Results for "E. Lellouch"

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How small can the light quark masses be?Jul 30 1997We derive lower bounds for the combination of light quark masses m_s +m_u and m_d +m_u. The derivation is based on first principles: the analyticity properties of two-point functions of local current operators and the positivity of the corresponding hadronic ... More
An intense thermospheric jet on TitanMar 28 2019Winds in Titan's lower and middle atmosphere have been determined by a variety of techniques, including direct measurements from the Huygens Probe over 0-150 km, Doppler shifts of molecular spectral lines in the optical, thermal infrared and mm ranges, ... More
"TNOs are Cool": A survey of the trans-Neptunian region XIV. Size/albedo characterization of the Haumea family observed with Herschel and SpitzerApr 12 2019A group of trans-Neptunian objects (TNO) are dynamically related to the dwarf planet 136108 Haumea. Ten of them show strong indications of water ice on their surfaces, are assumed to have resulted from a collision, and are accepted as the only known TNO ... More
Parametric Instability Rates in Periodically-Driven Band SystemsOct 10 2016This work analyses the dynamical properties of periodically-driven band models. Focusing on the case of Bose-Einstein condensates, and using a meanfield approach to treat inter-particle collisions, we identify the origin of dynamical instabilities arising ... More
Wind mapping in Venus' upper mesosphere with the IRAM-Plateau de Bure interferometerFeb 23 2012The dynamics of the upper mesosphere of Venus (~85-115 km) have been characterized as a combination of a retrograde superrotating zonal wind (RSZ) with a subsolar-to-antisolar flow (SSAS). Numerous mm-wave single-dish observations have been obtained and ... More
Physical studies of Centaurs and Trans-Neptunian Objects with the Atacama Large Millimeter ArrayFeb 18 2011Feb 22 2011Once completed, the Atacama Large Millimeter Array (ALMA) will be the most powerful (sub)millimeter interferometer in terms of sensitivity, spatial resolution and imaging. This paper presents the capabilities of ALMA applied to the observation of Centaurs ... More
Semileptonic $B\to D$ and $B\to D^*$ Decays from the LatticeMay 30 1995We obtain form factors relevant for semileptonic $B\to D$ and $B\to D^*$ decays from a quenched lattice QCD calculation. Our results enable us to test Heavy-Quark Symmetry, determine the Isgur-Wise function as well as obtain the Cabibbo-Kobayashi-Maskawa ... More
CKM matrix elements from tree-level decays and b-hadron lifetimesOct 22 2003We give an updated summary of the topics covered in Working Group I of the 2nd Workshop on the CKM Unitarity Triangle, with emphasis on the results obtained since the 1st CKM Workshop. The topics covered include the measurement of |V_{ub}|, of |V_{cb}| ... More
Semi-Leptonic Decays of $B$-MesonsDec 13 1994Form factors relevant for semi-leptonic $B\to D,\ D^*$ decays are obtained in quenched lattice QCD. Tests of heavy-quark symmetry as well as determinations of the Isgur-Wise function and $|V_{cb}|$ are presented.
Wind measurements in Mars' middle atmosphere at equinox and solstice: IRAM Plateau de Bure interferometric CO observationsJan 31 2007Characterizing the Martian atmosphere is an essential objective to understand its meteorology and its climate. The lower atmosphere (< 40 km) and middle atmosphere (40-80 km) of Mars appear dynamically coupled at much higher levels than in the case of ... More
Detection and characterization of Io's atmosphere from high-resolution 4-μm spectroscopyFeb 19 2015We report on high-resolution and spatially-resolved spectra of Io in the 4.0 {\mu}m region, recorded with the VLT/CRIRES instrument in 2008 and 2010, which provide the first detection of the {\nu}1 + {\nu}3 band of SO2 in Io's atmosphere. Data are analyzed ... More
The Thin Gap Chambers database experience in test beam and preparations for ATLASSep 26 2005Thin gap chambers (TGCs) are used for the muon trigger system in the forward region of the LHC experiment ATLAS. The TGCs are expected to provide a trigger signal within 25 ns of the bunch spacing. An extensive system test of the ATLAS muon spectrometer ... More
Interferometric mapping of the 3.3-mm continuum emission of comet 17P/Holmes after its 2007 outburstMay 02 2012Comet 17P/Holmes underwent a dramatic outburst in October 2007, caused by the sudden fragmentation of its nucleus and the production of a large quantity of grains scattering sunlight. We report on 90 GHz continuum observations carried out with the IRAM ... More
Exploring Io's atmospheric composition with APEX: first measurement of 34SO2 and tentative detection of KClAug 23 2013The composition of Io's tenuous atmosphere is poorly constrained. Only the major species SO2 and a handful of minor species have been positively identified, but a variety of other molecular species should be present, based on thermochemical equilibrium ... More
Coordinated thermal and optical observations of Trans-Neptunian object (20000) Varuna from Sierra NevadaJun 27 2002We report on coordinated thermal and optical measurements of trans-Neptunian object (20000) Varuna obtained in January-February 2002, respectively from the IRAM 30-m and IAA 1.5 m telescopes. The optical data show a lightcurve with a period of 3.176+/-0.010 ... More
Detection of CO in Triton's atmosphere and the nature of surface-atmosphere interactionsMar 15 2010Triton possesses a thin atmosphere, primarily composed of nitrogen, sustained by the sublimation of surface ices. The goal is to determine the composition of Triton's atmosphere and to constrain the nature of surface-atmosphere interactions. We perform ... More
Jupiter's hydrocarbons observed with ISO-SWS: vertical profiles of C2H6 and C2H2, detection of CH3C2HFeb 13 2000We have analysed the ISO-SWS spectrum of Jupiter in the 12-16 micron range, where several hydrocarbons exhibit rovibrational bands. Using temperature information from the methane and hydrogen emissions, we derive the mixing ratios (q) of acetylene and ... More
Pluto's lower atmosphere structure and methane abundance from high-resolution spectroscopy and stellar occultationsJan 30 2009Context: Pluto possesses a thin atmosphere, primarily composed of nitrogen, in which the detection of methane has been reported. Aims: The goal is to constrain essential but so far unknown parameters of Pluto's atmosphere such as the surface pressure, ... More
High resolution spectroscopy of Pluto's atmosphere: detection of the 2.3 $μ$m CH$_4$ bands and evidence for carbon monoxideApr 21 2011The goal is to determine the composition of Pluto's atmosphere and to constrain the nature of surface-atmosphere interactions. We perform high--resolution spectroscopic observations in the 2.33--2.36 $\mu$m range, using CRIRES at the VLT. We obtain (i) ... More
Exploring the spatial, temporal, and vertical distribution of methane in Pluto's atmosphereMar 13 2014High-resolution spectra of Pluto in the 1.66 um region, recorded with the VLT/CRIRES instrument in 2008 (2 spectra) and 2012 (5 spectra), are analyzed to constrain the spatial and vertical distribution of methane in Pluto's atmosphere and to search for ... More
Vapor pressure isotope fractionation effects in planetary atmospheres: application to deuteriumNov 15 1999The impact of the vapor pressure difference between deuterated and nondeuterated condensing molecules in planetary atmospheres is quantitatively assessed. This difference results in a loss of deuterium in the vapor phase above the condensation level. ... More
Parametric instabilities of interacting bosons in periodically-driven 1D optical latticesAug 22 2018Periodically-driven quantum systems are currently explored in view of realizing interacting topological phases. This Floquet-engineering approach is particularly promising in gases of ultracold atoms, where topological band structures can be engineered ... More
Search for signatures of dust in the Pluto-Charon system using Herschel/PACS observationsJun 25 2015In this letter we explore the environment of Pluto and Charon in the far infrared with the main aim to identify the signs of any possible dust ring, should it exist in the system. Our study is based on observations performed at 70 um with the PACS instrument ... More
Pluto's atmosphere from stellar occultations in 2012 and 2013Jun 26 2015Aug 14 2015We analyze two multi-chord stellar occultations by Pluto observed on July 18th, 2012 and May 4th, 2013, and monitored respectively from five and six sites. They provide a total of fifteen light-curves, twelve of them being used for a simultaneous fit ... More
The Isgur-Wise Function from the LatticeDec 07 1993Dec 08 1993We calculate the Isgur-Wise function by measuring the elastic scattering amplitude of a $D$ meson in the quenched approximation on a $24^3\times48$ lattice at $\beta=6.2$, using an $O(a)$-improved fermion action. We use this result, in conjunction with ... More
Matrix elements and diquark correlations in quenched QCD with overlap fermionsOct 12 2006We present results for B_K and selected matrix elements for beyond the standard model interactions obtained in quenched QCD with overlap fermions. We also illustrate results on baryon wave-functions and diquark correlations within baryons in the Coulomb ... More
Diquark correlations in baryons on the lattice with overlap quarksJan 26 2007Oct 19 2007We evaluate baryon wave functions in both the Coulomb and Landau gauge in lattice QCD. These are constructed from quark propagators calculated with the overlap Dirac operator on quenched gauge configurations at beta = 6. By comparing baryon states that ... More
Optimized Herschel/PACS photometer observing and data reduction strategies for moving solar system targetsSep 17 2013Sep 19 2013The "TNOs are Cool!: A survey of the trans-Neptunian region" is a Herschel Open Time Key Program that aims to characterize planetary bodies at the outskirts of the Solar System using PACS and SPIRE data, mostly taken as scan-maps. In this paper we summarize ... More
Haumea's thermal emission revisited in the light of the occultation resultsNov 23 2018A recent occultation measurement of the dwarf planet Haumea (Ortiz et al. 2017) revealed an elongated shape with the longest axis comparable to Pluto's mean diameter. The chords also indicate a ring around Haumea's equatorial plane, where its largest ... More
Optimization of OFDM radar waveforms using genetic algorithmsApr 25 2014In this paper, we present our investigations on the use of single objective and multiobjective genetic algorithms based optimisation algorithms to improve the design of OFDM pulses for radar. We discuss these optimization procedures in the scope of a ... More
The long-wavelength thermal emission of the Pluto-Charon system from Herschel observations. Evidence for emissivity effectsJan 21 2016Thermal observations of the Pluto-Charon system acquired by the Herschel Space Observatory in February 2012 are presented. They consist of photometric measurements with the PACS and SPIRE instruments (nine visits to the Pluto system each), covering six ... More
Localization transition in weakly-interacting Bose superfluids in one-dimensional quasiperdiodic latticesJul 19 2014Jan 12 2015We study the localization of collective pair excitations in weakly-interacting Bose superfluids in one-dimensional quasiperiodic lattices. The localization diagram is first determined numerically. For intermediate interaction and quasiperiodic amplitude ... More
The D/H ratio in the atmospheres of Uranus and Neptune from Herschel PACS observationsJan 24 2013Herschel-PACS measurements of the rotational R(0) and R(1) HD lines in the atmospheres of Uranus and Neptune are analyzed in order to derive a D/H ratio with improved precision for both planets. The derivation of the D/H ratio includes also previous measurements ... More
Leptonic decay-constant ratio $f_K/f_π$ from lattice QCD using 2+1 clover-improved fermion flavors with 2-HEX smearingJan 22 2016We present a calculation of the leptonic decay-constant ratio $f_K/f_\pi$ in 2+1 flavor QCD, performed via a series of lattice studies, which allows us to quantify all sources of systematic uncertainty. Our final result is $f_K/f_\pi=1.182(28)$, and with ... More
Earth-based detection of the millimetric thermal emission of the nucleus of comet 8P/TuttleJan 18 2011Little is known about the physical properties of cometary nuclei. Apart from space mission targets, measuring the thermal emission of a nucleus is one of the few means to derive its size, independently of its albedo, and to constrain some of its thermal ... More
Leptonic decay-constant ratio $f_K/f_π$ from lattice QCD using 2+1 clover-improved fermion flavors with 2-HEX smearingJan 22 2016Apr 04 2017We present a calculation of the leptonic decay-constant ratio $f_K/f_\pi$ in 2+1 flavor QCD. Our data set includes five lattice spacings and pion masses reaching down below the physical one. Special emphasis is placed on a careful study of all systematic ... More
First submillimeter observation of CO in the stratosphere of UranusNov 11 2013Context. Carbon monoxide (CO) has been detected in all Giant Planets and its origin is both internal and external in Jupiter and Neptune. Despite its first detection in Uranus a decade ago, the magnitude of its internal and external sources remains unconstrained. ... More
The thermal emission of Centaurs and Trans-Neptunian objects at millimeter wavelengths from ALMA observationsSep 20 2017The sensitivity of ALMA makes it possible to detect thermal mm/submm emission from small/distant Solar System bodies at the sub-mJy level. Measured fluxes are primarily sensitive to the objects' diameters, but deriving precise sizes is somewhat hampered ... More
Titan's atmosphere as observed by Cassini/VIMS solar occultations: CH$_4$, CO and evidence for C$_2$H$_6$ absorptionMay 24 2014Nov 20 2014We present an analysis of the VIMS solar occultations dataset, which allows us to extract vertically resolved information on the characteristics of Titan's atmosphere between 100-700 km with a characteristic vertical resolution of 10 km. After a series ... More
Comparison of absolute gain photometric calibration between Planck/HFI and Herschel/SPIRE at 545 and 857 GHzSep 06 2015Apr 07 2016We compare the absolute gain photometric calibration of the Planck/HFI and Herschel/SPIRE instruments on diffuse emission. The absolute calibration of HFI and SPIRE each relies on planet flux measurements and comparison with theoretical far-infrared emission ... More
TNOs are Cool: A Survey of the Transneptunian Region XI: A Herschel-PACS view of 16 CentaursSep 04 2013Mar 05 2014Centaurs are the transitional population between trans-Neptunian objects (TNOs) and Jupiter-family comets. For this reason it is possible to access the smaller ones, which is more difficult to do with the TNO population. The goal of this work is to characterize ... More
Detection of CO and HCN in Pluto's atmosphere with ALMAJun 10 2016Oct 13 2016Observations of the Pluto-Charon system, acquired with the ALMA interferometer on June 12-13, 2015, have yielded a detection of the CO(3-2) and HCN(4-3) rotational transitions from Pluto, providing a strong confirmation of the presence of CO, and the ... More
From enemies to friends: chiral symmetry on the latticeMar 28 2002The physics of strong interactions is invariant under the exchange of left-handed and right-handed quarks, at least in the massless limit. This invariance is reflected in the chiral symmetry of quantum chromodynamics. Surprisingly, it has become clear ... More
TNOs are Cool: a survey of the Transneptunian Region XII. Thermal light curves of Haumea, 2003 VS2 and 2003 AZ84 with Herschel Space Observatory-PACSMay 25 2017Time series observations of the dwarf planet Haumea and the Plutinos 2003VS2 and 2003AZ84 with Herschel/PACS are presented in this work. Thermal emission of these trans-Neptunian objects were acquired as part of the TNOs are Cool Herschel Space Observatory ... More
"TNOs are Cool": A survey of the trans-Neptunian region X. Analysis of classical Kuiper belt objects from Herschel and Spitzer observationsMar 25 2014The classical Kuiper belt contains objects both from a low-inclination, presumably primordial, distribution and from a high-inclination dynamically excited population. Based on a sample of classical TNOs with observations at thermal wavelengths we determine ... More
Finite size scaling of meson propagators with isospin chemical potentialApr 24 2008We determine the volume and mass dependence of scalar and pseudoscalar two-point functions in N_f-flavour QCD, in the presence of an isospin chemical potential and at fixed gauge-field topology. We obtain these results at second order in the \epsilon-expansion ... More
Neutral B Meson Mixing and Decay Constants from Lattice QCDDec 13 1999Mar 02 2000We present updates of our results for neutral $B$-meson mixing and leptonic decay constants obtained in the quenched approximation from a mean-field-improved Sheikholeslami-Wohlert action at two values of lattice spacing. We consider quantities such as ... More
Unique Spectroscopy and Imaging of Mars with JWSTOct 15 2015In this document, we summarize the main capabilities of the James Webb Space Telescope (JWST) for performing observations of Mars. The distinctive vantage point of JWST at the Sun-Earth Lagrange point (L2) will allow sampling the full observable disk, ... More
Dispersive Bounds on the Shape of B -> D^(*) l nu Form FactorsDec 17 1997Dispersive constraints on the shape of the form factors which describe the exclusive decays B -> D^(*) l nu are derived by fully exploiting spin symmetry in the ground-state doublet of heavy-light mesons. The analysis includes all twenty B^(*) -> D^(*) ... More
A numerical treatment of Neuberger's lattice Dirac operatorJan 11 2000We describe in some detail our numerical treatment of Neuberger's lattice Dirac operator as implemented in a practical application. We discuss the improvements we have found to accelerate the numerical computations and give an estimate of the expense ... More
Chiral symmetry breaking from Ginsparg-Wilson fermionsSep 03 1999Sep 24 1999We calculate the large-volume and small-mass dependences of the quark condensate in quenched QCD using Neuberger's operator. We find good agreement with the predictions of quenched chiral perturbation theory, enabling a determination of the chiral lagrangian ... More
Model-independent description of $B\to πlν$ decays and a determination of $|V_{ub}|$Jul 17 2008Oct 04 2010We propose a new parametrization of the $B\to\pi$ vector form factor, $f_+(q^2)$, as an expansion in powers of a conformal mapping variable, which satisfies unitarity, analyticity and perturbative QCD scaling. The unitarity constraint is used also for ... More
The CKM Lattice Working Group initiativeSep 30 2002We present the CKM-LWG, a collection of working groups whose aim is to compile world averages of lattice results relevant for high-energy phenomenology.
The Rate for $e^+e^-\to B B^\pm π^\mp$ and its Implications for the Study of CP Violation, $B_s$ Identification, and the Study of $B$ Meson Chiral Perturbation TheoryJan 08 1993H.~Yamamoto has proposed employing $B$ mesons produced in conjunction with a single charged pion at an $\Upsilon$ resonance for studies of CP violation in the neutral $B$ meson system at a symmetric $e^+$-$e^-$ collider. The sign of the charged pion would ... More
Finite-size scaling of the quark condensate in quenched lattice QCDJul 28 1999We confront the finite volume and small quark mass behaviour of the scalar condensate, determined numerically in quenched lattice QCD using Neuberger fermions, with predictions of quenched chiral perturbation theory. We find that quenched chiral perturbation ... More
Design of OFDM radar pulses using genetic algorithm based techniquesJun 19 2015The merit of evolutionary algorithms (EA) to solve convex optimization problems is widely acknowledged. In this paper, a genetic algorithm (GA) optimization based waveform design framework is used to improve the features of radar pulses relying on the ... More
Delta S=2 and Delta I=3/2 Matrix Elements in Quenched QCDSep 18 1998Sep 29 1998We present preliminary results for B_K, B_7^{3/2} and B_8^{3/2} from two high-statistics lattice computations. These calculations are performed at beta=6.0 and 6.2 in the quenched approximation, using mean-field-improved Sheikholeslami-Wohlert fermionic ... More
B_K from quenched overlap QCDDec 10 2002We present an exploratory calculation of the standard model Delta S=2 matrix element relevant for indirect CP violation in K -> pi pi decays. The computation is performed with overlap fermions in the quenched approximation at beta=6.0 on a 16^3x32 lattice. ... More
Standard Model Matrix Elements for Neutral B-Meson Mixing and Associated Decay ConstantsNov 07 2000Feb 28 2002We present results of quenched lattice calculations of the matrix elements relevant for B_d-\bar B_d and B_s-\bar B_s mixing in the Standard Model. Results for the corresponding SU(3)-breaking ratios, which can be used to constrain or determine |V_{td}|, ... More
"TNOs are Cool": A survey of the trans-Neptunian region -- VII. Size and surface characteristics of (90377) Sedna and 2010 EK139Apr 04 2012We present estimates of the basic physical properties (size and albedo) of (90377) Sedna, a prominent member of the detached trans-Neptunian object population and the recently discovered scattered disk object 2010 EK139, based on the recent observations ... More
A portrait of the extreme Solar System object 2012 DR30Apr 26 20132012 DR30 is a recently discovered Solar System object on a unique orbit, with a high eccentricity of 0.9867, a perihelion distance of 14.54 AU and a semi-major axis of 1109 AU, in this respect outscoring the vast majority of trans-Neptunian objects. ... More
Non-perturbative renormalization of the quark condensate in Ginsparg-Wilson regularizationsJun 17 2001We present a method to compute non-perturbatively the renormalization constant of the scalar density for Ginsparg-Wilson fermions. It relies on chiral symmetry and is based on a matching of renormalization group invariant masses at fixed pseudoscalar ... More
"TNOs are Cool": A survey of the trans-Neptunian region VI. Herschel/PACS observations and thermal modeling of 19 classical Kuiper belt objectsApr 03 2012Trans-Neptunian objects (TNO) represent the leftovers of the formation of the Solar System. Their physical properties provide constraints to the models of formation and evolution of the various dynamical classes of objects in the outer Solar System. Based ... More
An upper limit for the water outgassing rate of the main-belt comet 176P/LINEAR observed with Herschel/HIFIAug 27 2012Sep 25 2012176P/LINEAR is a member of the new cometary class known as main-belt comets (MBCs). It displayed cometary activity shortly during its 2005 perihelion passage that may be driven by the sublimation of sub-surface ices. We have therefore searched for emission ... More
Neutral B Meson Mixing and Heavy-light Decay Constants from Quenched Lattice QCDSep 03 1998Mar 02 2000We present high-statistics results for neutral $B$-meson mixing and heavy-light-meson leptonic decays in the quenched approximation from tadpole-improved clover actions at $\beta = 6.0$ and $\beta = 6.2$. We consider quantities such as $B_{B_{d(s)}}$, ... More
Scalar condensate and light quark masses from overlap fermionsOct 25 2001We have studied pseudoscalar correlation functions computed using the overlap operator. Within the accuracy of our calculation we find that the quark mass dependence agrees with the prediction of lowest-order Chiral Perturbation Theory (ChPT) for quark ... More
Propagation of collective pair excitations in disordered Bose superfluidsApr 23 2015We study the effect of disorder on the propagation of collective excitations in a disordered Bose superfluid. We incorporate local density depletion induced by strong disorder at the meanfield level, and formulate the transport of the excitations in terms ... More
B_K from quenched QCD with exact chiral symmetryJun 30 2003We present a calculation of the standard model \Delta S=2 matrix element relevant to indirect CP violation in K->\pi\pi decays which uses Neuberger's chiral formulation of lattice fermions. The computation is performed in the quenched approximation on ... More
Two-component Bose gases with one-body and two-body couplingsJul 01 2013Jan 01 2014We study the competition between one-body and two-body couplings in weakly-interacting two-component Bose gases, in particular as regards field correlations. We derive the meanfield theory for both ground state and low-energy pair excitations in the general ... More
TNOs are Cool: A survey of the trans-Neptunian region V. Physical characterization of 18 Plutinos using Herschel PACS observationsFeb 16 2012We present Herschel PACS photometry of 18 Plutinos and determine sizes and albedos for these objects using thermal modeling. We analyze our results for correlations, draw conclusions on the Plutino size distribution, and compare to earlier results. Flux ... More
JWST observations of stellar occultations by solar system bodies and ringsOct 22 2015Nov 24 2015In this paper we investigate the opportunities provided by the James Webb Space Telescope (JWST) for significant scientific advances in the study of solar system bodies and rings using stellar occultations. The strengths and weaknesses of the stellar ... More
THERMAP: a mid-infrared spectro-imager for space missions to small bodies in the inner solar systemSep 09 2015We present THERMAP, a mid-infrared (8-16 {\mu}m) spectro-imager for space missions to small bodies in the inner solar system, developed in the framework of the MarcoPolo-R asteroid sample return mission. THERMAP is very well suited to characterize the ... More
TNOs are Cool: A survey of the trans-Neptunian region. VIII. Combined Herschel PACS and SPIRE observations of 9 bright targets at 70--500 micronMay 02 2013May 03 2013Transneptunian objects (TNOs) are bodies populating the Kuiper Belt and they are believed to retain the most pristine and least altered material of the solar system. The Herschel Open Time Key Program entitled "TNOs are Cool: A survey of the trans-Neptunian ... More
"TNOs are Cool": A Survey of the Transneptunian Region IV. Size/albedo characterization of 15 scattered disk and detached objects observed with Herschel Space Observatory-PACSFeb 07 2012Physical characterization of Trans-Neptunian objects, a primitive population of the outer solar system, may provide constraints on their formation and evolution. The goal of this work is to characterize a set of 15 scattered disk (SDOs) and detached objects, ... More
The XENON1T Dark Matter ExperimentAug 23 2017The XENON1T experiment at the Laboratori Nazionali del Gran Sasso (LNGS) is the first WIMP dark matter detector operating with a liquid xenon target mass above the ton-scale. Out of its 3.2t liquid xenon inventory, 2.0t constitute the active target of ... More
Herschel measurements of the D/H and 16O/18O ratios in water in the Oort-cloud comet C/2009 P1 (Garradd)Jul 31 2012The D/H ratio in cometary water is believed to be an important indicator of the conditions under which icy planetesimals formed and can provide clues to the contribution of comets to the delivery of water and other volatiles to Earth. Available measurements ... More
First Dark Matter Search Results from the XENON1T ExperimentMay 18 2017Nov 23 2017We report the first dark matter search results from XENON1T, a $\sim$2000-kg-target-mass dual-phase (liquid-gas) xenon time projection chamber in operation at the Laboratori Nazionali del Gran Sasso in Italy and the first ton-scale detector of this kind. ... More
"TNOs are Cool": A survey of the trans-Neptunian region I. Results from the Herschel Science Demonstration Phase (SDP)May 17 2010The goal of the Herschel Open Time Key programme "TNOs are Cool!" is to derive the physical and thermal properties for a large sample of Centaurs and trans-Neptunian objects (TNOs), including resonant, classical, detached and scattered disk objects. We ... More
"TNOs are cool": A survey of the trans-neptunian region. II. The thermal lightcurve of (136108) HaumeaJun 01 2010Thermal emission from Kuiper Belt object (136108) Haumea was measured with Herschel-PACS at 100 and 160 micrometers for almost a full rotation period. Observations clearly indicate a 100-micrometer thermal lightcurve with an amplitude of a factor of ~ ... More
Size and shape of Chariklo from multi-epoch stellar occultationsAug 29 2017We use data from five stellar occultations observed between 2013 and 2016 to constrain Chariklo's size and shape, and the ring reflectivity. We consider four possible models for Chariklo (sphere, Maclaurin spheroid, tri-axial ellipsoid and Jacobi ellipsoid) ... More
Vector and Axial-Vector Propagators in the ε-Regime of QCDSep 04 2003Using quenched and unquenched chiral perturbation theory we compute vector and axial current two-point functions at finite volume and fixed gauge field topology, in the so-called \epsilon-regime of QCD. A comparison of these results with finite volume ... More
Electroweak penguins and SUSY K^0-\bar K^0 mixing with Neuberger quarksSep 21 2004We present results for Delta I=3/2 and Delta S=2 matrix elements relevant for CP violation in K->Pi Pi decays and for the K_S-K_L mass difference in the standard model and beyond. They were obtained with Neuberger fermions on quenched gauge configurations ... More
The Herschel-SPIRE instrument and its in-flight performanceMay 27 2010The Spectral and Photometric Imaging Receiver (SPIRE), is the Herschel Space Observatory`s submillimetre camera and spectrometer. It contains a three-band imaging photometer operating at 250, 350 and 500 microns, and an imaging Fourier Transform Spectrometer ... More
Review of lattice results concerning low-energy particle physicsJul 01 2016We review lattice results related to pion, kaon, D- and B-meson physics with the aim of making them easily accessible to the particle physics community. More specifically, we report on the determination of the light-quark masses, the form factor f+(0), ... More
Light hadron and diquark spectroscopy in quenched QCD with overlap quarks on a large latticeSep 12 2005Jul 18 2006A simulation of quenched QCD with the overlap Dirac operator has been completed using 100 Wilson gauge configurations at beta = 6 on an 18^3 x 64 lattice and at beta = 5.85 on a 14^3 x 48 lattice, both in Landau gauge. We present results for light meson ... More
Light hadron spectra and wave functions in quenched QCD with overlap quarks on a large latticeSep 21 2004A simulation of quenched QCD with the overlap Dirac operator has been completed using 100 Wilson gauge configurations at beta=6 on an 18^3x64 lattice. We present results for meson and baryon masses, meson final state "wave functions'' and other observables. ... More
Preliminary results from a simulation of quenched QCD with overlap fermions on a large latticeOct 02 2003Oct 10 2003We simulate quenched QCD with the overlap Dirac operator. We work with the Wilson gauge action at beta=6 on an 18^3x64 lattice. We calculate quark propagators for a single source point and quark mass ranging from am_q=0.03 to 0.75. We present here preliminary ... More
Finite-volume corrections to the leading-order hadronic contribution to $g_μ-2$Feb 07 2015We present preliminary results of a 2+1-flavor study of finite-volume effects in the lattice QCD computation of the leading-order hadronic contribution to the muon anomalous magnetic moment. We also present methods for obtaining directly the invariant ... More
Light hadron spectroscopy in quenched QCD with overlap fermionsSep 30 2005A simulation of quenched QCD with the overlap Dirac operator has been carried out using 100 Wilson gauge configurations at beta = 6 on an 18^3 x 64 lattice and at beta = 5.85 on a 14^3 x 48 lattice. Here we present results for meson masses, meson final ... More
Finite-Size Scaling of Vector and Axial Current CorrelatorsNov 11 2002Feb 13 2003Using quenched chiral perturbation theory, we compute the long-distance behaviour of two-point functions of flavour non-singlet axial and vector currents in a finite volume, for small quark masses, and at a fixed gauge-field topology. We also present ... More
Lattice-Constrained Parametrizations of Form Factors for Semileptonic and Rare Radiative B DecaysAug 28 1997We describe the form factors for semileptonic B to rho l nu and radiative B to K* gamma decays with just two parameters and the two form factors for semileptonic B to pi l nu decays with three parameters. The parametrizations are constrained by lattice ... More
Lattice-Constrained Parametrizations of Form Factors for Semileptonic and Rare Radiative B DecaysAug 13 1997Oct 22 1997We describe the form factors for B to rho lepton neutrino and B to K* gamma decays with just two parameters and the two form factors for B to pi lepton neutrino with a further two or three parameters. The parametrizations are consistent with heavy quark ... More
ISO-SWS observations of Jupiter: measurement of the ammonia tropospheric profile and of the 15N/14N isotopic ratioNov 15 1999We present the results of the Infrared Space Observatory Short Wavelength Spectrometer (ISO-SWS) observations of Jupiter related to ammonia. We focus on two spectral regions; the first one (the 10-micron region), probes atmospheric levels between 1 and ... More
K^0-\bar K^0 mixing beyond the standard model and CP-violating electroweak penguins in quenched QCD with exact chiral symmetryMay 18 2006We present results for the \Delta S=2 matrix elements which are required to study neutral kaon mixing in the standard model (SM) and beyond (BSM). We also provide leading chiral order results for the matrix elements of the electroweak penguin operators ... More
The Herschel-SPIRE submillimetre spectrum of MarsMay 25 2010We have obtained the first continuous disk averaged spectrum of Mars from 450 to 1550 Ghz using the Herschel-SPIRE Fourier Transform Spectrometer. The spectrum was obtained at a constant resolution of 1.4 GHz across the whole band. The flux from the planet ... More
HIFI Observations of Water in the Atmosphere of Comet C/2008 Q3 (Garradd)May 17 2010May 18 2010High-resolution far-infrared and sub-millimetre spectroscopy of water lines is an important tool to understand the physical and chemical properties of cometary atmospheres. We present observations of several rotational ortho- and para-water transitions ... More
A study of the distant activity of comet C/2006 W3 (Christensen) using Herschel and ground-based radio telescopesMay 10 2010Comet C/2006 W3 (Christensen) was observed in November 2009 at 3.3 AU from the Sun with Herschel. The PACS instrument acquired images of the dust coma in 70- and 160-micrometers filters, and spectra covering several H2O rotational lines. Spectra in the ... More
Water production in comet 81P/Wild 2 as determined by Herschel/HIFIJul 01 2010The high spectral resolution and sensitivity of Herschel/HIFI allows for the detection of multiple rotational water lines and accurate determinations of water production rates in comets. In this letter we present HIFI observations of the fundamental 110-101 ... More
Up and down quark masses and corrections to Dashen's theorem from lattice QCD and quenched QEDApr 25 2016In a previous letter (arXiv:1306.2287) we determined the isospin mass splittings of the baryon octet from a lattice calculation based on quenched QED and $N_f{=}2{+}1$ QCD simulations with 5 lattice spacings down to $0.054~\mathrm{fm}$, lattice sizes ... More
Leading-order hadronic contributions to $g_μ-2$Nov 18 2013Nov 25 2013We present preliminary lattice results for the leading-order hadronic contribution to the muon anomalous magnetic moment, calculated with HEX-smeared clover fermions. In our calculation we include 2+1-flavor ensembles with pions at the physical mass.