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Articles 1 - 30 of 58
Full-Text Articles in Physics
Upsilon(1s)->Gamma+F2'(1525); F2'(1525)->K0sk0s Decays, Raymond Mountain, Marina Artuso, S. Blusk, T. Skwarnicki
Upsilon(1s)->Gamma+F2'(1525); F2'(1525)->K0sk0s Decays, Raymond Mountain, Marina Artuso, S. Blusk, T. Skwarnicki
Physics - All Scholarship
We report on a study of exclusive radiative decays of the Upsilon(1S) resonance into a final state consisting of a photon and two K0s candidates. We find evidence for a signal for Upsilon(1S)->gamma f_2'(1525); f_2'(1525)->K0sK0s, at a rate (4.0+/-1.3+/-0.6)x10^{-5}, consistent with previous observations of Upsilon(1S)->gamma f_2'(1525); f_2'(1525)->K+K-, and isospin. Combining this branching fraction with existing branching fraction measurements of Upsilon(1S)->gamma f_2'(1525) and J/psi->gamma f_2'(1525), we obtain the ratio of branching fractions: B(Upsilon(1S)->gamma f_2'(1525))/B(J/psi->gamma f_2'(1525))=0.09+/-0.02, approximately consistent with expectations based on soft collinear effective theory.
ϒ(1s)→Γf'2(1525); F'2(1525)->K0sk0s Decays, Raymond Mountain, Marina Artuso, T. Skwarnicki, S. Stone
ϒ(1s)→Γf'2(1525); F'2(1525)->K0sk0s Decays, Raymond Mountain, Marina Artuso, T. Skwarnicki, S. Stone
Physics - All Scholarship
We report on a study of exclusive radiative decays of the Upsilon(1S) resonance into a final state consisting of a photon and two K0s candidates. We find evidence for a signal for Upsilon(1S)->gamma f_2'(1525); f_2'(1525)->K0sK0s, at a rate (4.0+/-1.3+/-0.6)x10^{-5}, consistent with previous observations of Upsilon(1S)->gamma f_2'(1525); f_2'(1525)->K+K-, and isospin. Combining this branching fraction with existing branching fraction measurements of Upsilon(1S)->gamma f_2'(1525) and J/psi->gamma f_2'(1525), we obtain the ratio of branching fractions: B(Upsilon(1S)->gamma f_2'(1525))/B(J/psi->gamma f_2'(1525))=0.09+/-0.02, approximately consistent with expectations based on soft collinear effective theory.
Crystalline Order On Catenoidal Capillary Bridges, Mark Bowick, Zhenwei Yao
Crystalline Order On Catenoidal Capillary Bridges, Mark Bowick, Zhenwei Yao
Physics - All Scholarship
We study the defect structure of crystalline particle arrays on negative Gaussian curvature capillary bridges with vanishing mean curvature (catenoids). The threshold aspect ratio for the appearance of isolated disclinations is found and the optimal positions for dislocations determined. We also discuss the transition from isolated disclinations to scars as particle number and aspect ratio are varied.
Crystalline Order On Catenoidal Capillary Bridges, Mark Bowick, Zhenwei Yao
Crystalline Order On Catenoidal Capillary Bridges, Mark Bowick, Zhenwei Yao
Physics - All Scholarship
We study the defect structure of crystalline particle arrays on negative Gaussian curvature capillary bridges with vanishing mean curvature (catenoids). The threshold aspect ratio for the appearance of isolated disclinations is found and the optimal positions for dislocations determined. We also discuss the transition from isolated disclinations to scars as particle number and aspect ratio are varied.
Chaos And Universality In Two-Dimensional Ising Spin Glasses, Alan Middleton, Creighton K. Thomas, David A. Huse
Chaos And Universality In Two-Dimensional Ising Spin Glasses, Alan Middleton, Creighton K. Thomas, David A. Huse
Physics - All Scholarship
Recently extended precise numerical methods and droplet scaling arguments allow for a coherent picture of the glassy states of two-dimensional Ising spin glasses to be assembled. The length scale at which entropy becomes important and produces "chaos", the extreme sensitivity of the state to temperature, is found to depend on the type of randomness. For the $\pm J$ model this length scale dominates the low-temperature specific heat. Although there is a type of universality, some critical exponents do depend on the distribution of disorder.
Do Cosmological Perturbations Have Zero Mean?, Christian Armendariz-Picon
Do Cosmological Perturbations Have Zero Mean?, Christian Armendariz-Picon
Physics - All Scholarship
A central assumption in our analysis of cosmic structure is that cosmological perturbations have zero ensemble mean. This property is one of the consequences of statistically homogeneity, the invariance of correlation functions under spatial translations. In this article we explore whether cosmological perturbations indeed have zero mean, and thus test one aspect of statistical homogeneity. We carry out a classical test of the zero mean hypothesis against a class of alternatives in which perturbations have non-vanishing means, but homogeneous and isotropic covariances. Apart from Gaussianity, our test does not make any additional assumptions about the nature of the perturbations and …
Model-Independent Determination Of The Strong-Phase Difference Between D0 And D0 → K0s,L H+H- (H=Π,K) And Its Impact On The Measurement Of The Ckm Angle Γ/Φ3, Raymond Mountain, Marina Artuso, S. Blusk, N. Horwitz
Model-Independent Determination Of The Strong-Phase Difference Between D0 And D0 → K0s,L H+H- (H=Π,K) And Its Impact On The Measurement Of The Ckm Angle Γ/Φ3, Raymond Mountain, Marina Artuso, S. Blusk, N. Horwitz
Physics - All Scholarship
We report the first determination of the relative strong-phase difference between D^0 -> K^0_S,L K^+ K^- and D^0-bar -> K^0_S,L K^+ K^-. In addition, we present updated measurements of the relative strong-phase difference between D^0 -> K^0_S,L pi^+ pi^- and D^0-bar -> K^0_S,L pi^+ pi^-. Both measurements exploit the quantum coherence between a pair of D^0 and D^0-bar mesons produced from psi(3770) decays. The strong-phase differences measured are important for determining the Cabibbo-Kobayashi-Maskawa angle gamma/phi_3 in B^- -> K^- D^0-tilde decays, where D^0-tilde is a D^0 or D^0-bar meson decaying to K^0_S h^+ h^- (h=pi,K), in a manner independent of …
Model-Independent Determination Of The Strong-Phase Difference Between D^0 And D^0-Bar-> K^0_S,L H^+ H^- (H=Pi,K) And Its Impact On The Measurement Of The Ckm Angle Gamma/Phi_3, Raymond Mountain, Marina Artuso, S. Blusk, N. Horwitz
Model-Independent Determination Of The Strong-Phase Difference Between D^0 And D^0-Bar-> K^0_S,L H^+ H^- (H=Pi,K) And Its Impact On The Measurement Of The Ckm Angle Gamma/Phi_3, Raymond Mountain, Marina Artuso, S. Blusk, N. Horwitz
Physics - All Scholarship
We report the first determination of the relative strong-phase difference between D^0 -> K^0_S,L K^+ K^- and D^0-bar -> K^0_S,L K^+ K^-. In addition, we present updated measurements of the relative strong-phase difference between D^0 -> K^0_S,L pi^+ pi^- and D^0-bar -> K^0_S,L pi^+ pi^-. Both measurements exploit the quantum coherence between a pair of D^0 and D^0-bar mesons produced from psi(3770) decays. The strong-phase differences measured are important for determining the Cabibbo-Kobayashi-Maskawa angle gamma/phi_3 in B^- -> K^- D^0-tilde decays, where D^0-tilde is a D^0 or D^0-bar meson decaying to K^0_S h^+ h^- (h=pi,K), in a manner independent of …
Search For Rare And Forbidden Decays Of Charm And Charmed-Strange Mesons To Final States H+- E-+ E+, Raymond Mountain, Marina Artuso, S. Blusk, T. Skwarnicki
Search For Rare And Forbidden Decays Of Charm And Charmed-Strange Mesons To Final States H+- E-+ E+, Raymond Mountain, Marina Artuso, S. Blusk, T. Skwarnicki
Physics - All Scholarship
We have searched for flavor-changing neutral current decays and lepton-number-violating decays of D^+ and D^+_s mesons to final states of the form h^+- e^-+ e^+, where h is either \pi or K. We use the complete samples of CLEO-c open-charm data, corresponding to integrated luminosities of 818 pb^-1 at the center-of-mass energy E_CM = 3.774 GeV containing 2.4 x 10^6 D^+D^- pairs and 602 pb^-1 at E_CM = 4.170 GeV containing 0.6 x 10^6 D^*+-_s D^-+_s pairs. No signal is observed in any channel, and we obtain 90% confidence level upper limits on branching fractions B(D^+ --> \pi^+ e^+ e^-) …
A Search For Gravitational Waves Associated With The August 2006 Timing Glitch Of The Vela Pulsar, Duncan Brown, J. Abadie
A Search For Gravitational Waves Associated With The August 2006 Timing Glitch Of The Vela Pulsar, Duncan Brown, J. Abadie
Physics - All Scholarship
The physical mechanisms responsible for pulsar timing glitches are thought to excite quasi-normal mode oscillations in their parent neutron star that couple to gravitational wave emission. In August 2006, a timing glitch was observed in the radio emission of PSR B0833-45, the Vela pulsar. At the time of the glitch, the two co-located Hanford gravitational wave detectors of the Laser Interferometer Gravitational-wave observatory (LIGO) were operational and taking data as part of the fifth LIGO science run (S5). We present the first direct search for the gravitational wave emission associated with oscillations of the fundamental quadrupole mode excited by a …
Search For Rare And Forbidden Decays Of Charm And Charmed-Strange Mesons To Final States H^+- E^-+ E^+, Raymond Mountain, Marina Artuso, S. Blusk, T. Skwarnicki
Search For Rare And Forbidden Decays Of Charm And Charmed-Strange Mesons To Final States H^+- E^-+ E^+, Raymond Mountain, Marina Artuso, S. Blusk, T. Skwarnicki
Physics - All Scholarship
We have searched for flavor-changing neutral current decays and lepton-number-violating decays of D^+ and D^+_s mesons to final states of the form h^+- e^-+ e^+, where h is either \pi or K. We use the complete samples of CLEO-c open-charm data, corresponding to integrated luminosities of 818 pb^-1 at the center-of-mass energy E_CM = 3.774 GeV containing 2.4 x 10^6 D^+D^- pairs and 602 pb^-1 at E_CM = 4.170 GeV containing 0.6 x 10^6 D^*+-_s D^-+_s pairs. No signal is observed in any channel, and we obtain 90% confidence level upper limits on branching fractions B(D^+ --> \pi^+ e^+ e^-) …
Roadmap For Selected Key Measurements Of Lhcb, Raymond Mountain, Marina Artuso, S. Blusk, Alessandra Borgia
Roadmap For Selected Key Measurements Of Lhcb, Raymond Mountain, Marina Artuso, S. Blusk, Alessandra Borgia
Physics - All Scholarship
Six of the key physics measurements that will be made by the LHCb experiment, concerning CP asymmetries and rare B decays, are discussed in detail. The "road map" towards the precision measurements is presented, including the use of control channels and other techniques to understand the performance of the detector with the first data from the LHC.
Twisted Lattice Supersymmetry And Applications To Ads/Cft, Simon Catterall
Twisted Lattice Supersymmetry And Applications To Ads/Cft, Simon Catterall
Physics - All Scholarship
Review recent approaches to constructing supersymmetric lattice theories focusing in particular on the concept of topological twisting. The latter technique is shown to expose a nilpotent, scalar supersymmetry which can be implemented exactly in the lattice theory. Using these ideas a lattice action for \cN=4 super Yang-Mills in four dimensions can be written down which is gauge invariant, free of fermion doublers and respects one out of a total of 16 continuum supersymmetries. It is shown how these exact symmetries together with the large point group symmetry of the lattice strongly constrain the possible counterterms needed to renormalize the theory …
Mcrg Minimal Walking Technicolor, Simon Catterall, Luigi Del Debbio, Joel Giedt, Liam Keegan
Mcrg Minimal Walking Technicolor, Simon Catterall, Luigi Del Debbio, Joel Giedt, Liam Keegan
Physics - All Scholarship
We present a Monte Carlo renormalisation group study of the SU(2) gauge theory with two Dirac fermions in the adjoint representation. Using the two lattice matching technique recently advocated and exploited in [arXiv:0907.0919], we measure the running of the coupling and the anomalous mass dimension.
Three Dimensional Lattice Gravity As Supersymmetric Yang-Mills Theory, Simon Catterall
Three Dimensional Lattice Gravity As Supersymmetric Yang-Mills Theory, Simon Catterall
Physics - All Scholarship
We argue that a certain twisted supersymmetric Yang-Mills theory in three dimensions with gauge group SU(2) possesses a set of topological observables whose expectation values can be computed in a related Chern Simons theory. This Chern Simons theory has been proposed as a definition of three dimensional Euclidean quantum gravity. Since the YM theory admits a discretization which preserves the values of topological observables we conjecture that it can be used as a non-perturbative definition of the quantum gravity theory.
Study Of Ψ(2s) Decays To Γpp, Π0pp And Η Pp And Search For Pp Threshold Enhancements, Raymond Mountain, Marina Artuso, S. Blusk, T. Skwarnicki
Study Of Ψ(2s) Decays To Γpp, Π0pp And Η Pp And Search For Pp Threshold Enhancements, Raymond Mountain, Marina Artuso, S. Blusk, T. Skwarnicki
Physics - All Scholarship
The decays of psi(2S) into gamma p bar{p}, pi^0 p bar{p} and eta p bar{p} have been studied with the CLEO-c detector using a sample of 24.5 million psi(2S) events obtained from e^+e^- annihilations at sqrt{s} = 3686 MeV. The data show evidence for the excitation of several N^* resonances in p pi^0 and p eta channels in pi^0 p bar{p} and eta p bar{p} decays, and f_2 states in gamma p bar{p} decay. Branching fractions for decays of psi(2S) to gamma p bar{p}, pi^0 p bar{p} and eta p bar{p} have been determined. No evidence for p bar{p} threshold …
Study Of Psi(2s) Decays To Gamma P Bar{P}, Pi^0 P Bar{P} And Eta P Bar{P} And Search For P Bar{P} Threshold Enhancements, Raymond Mountain, Marina Artuso, S. Blusk, T. Skwarnicki
Study Of Psi(2s) Decays To Gamma P Bar{P}, Pi^0 P Bar{P} And Eta P Bar{P} And Search For P Bar{P} Threshold Enhancements, Raymond Mountain, Marina Artuso, S. Blusk, T. Skwarnicki
Physics - All Scholarship
The decays of psi(2S) into gamma p bar{p}, pi^0 p bar{p} and eta p bar{p} have been studied with the CLEO-c detector using a sample of 24.5 million psi(2S) events obtained from e^+e^- annihilations at sqrt{s} = 3686 MeV. The data show evidence for the excitation of several N^* resonances in p pi^0 and p eta channels in pi^0 p bar{p} and eta p bar{p} decays, and f_2 states in gamma p bar{p} decay. Branching fractions for decays of psi(2S) to gamma p bar{p}, pi^0 p bar{p} and eta p bar{p} have been determined. No evidence for p bar{p} threshold …
Interaction Of Atomic And Molecular Hydrogen With Tholin Surfaces At Low Temperatures, Gianfranco Vidali, Ling Li, Hui Zhao
Interaction Of Atomic And Molecular Hydrogen With Tholin Surfaces At Low Temperatures, Gianfranco Vidali, Ling Li, Hui Zhao
Physics - All Scholarship
We study the interaction of atomic and molecular hydrogen with a surface of tholin, a man-made polymer considered to be an analogue of aerosol particles present in Titan's atmosphere, using thermal programmed desorption at low temperatures below 30 K. The results are fitted and analyzed using a fine-grained rate equation model that describes the diffusion, reaction and desorption processes. We obtain the energy barriers for diffusion and desorption of atomic and molecular hydrogen. These barriers are found to be in the range of 30 to 60 meV, indicating that atom/molecule-surface interactions in this temperature range are dominated by weak adsorption …
Measurement Of Σ(Pp -> Bb-X) At √S=7 Tev In The Forward Region, Raymond Mountain, Marina Artuso, S. Blusk, Alessandra Borgia
Measurement Of Σ(Pp -> Bb-X) At √S=7 Tev In The Forward Region, Raymond Mountain, Marina Artuso, S. Blusk, Alessandra Borgia
Physics - All Scholarship
Decays of b hadrons into final states containing a D0 meson and a muon are used to measure the b anti-b production cross-section in proton-proton collisions at a centre-of-mass energy of 7 TeV at the LHC. In the pseudorapidity interval 2 < eta < 6 and integrated over all transverse momenta we find that the average cross-section to produce b-flavoured or anti-b-flavoured hadrons is (75.3 +/- 5.4 +/- 13.0) microbarns.
Measurement Of Sigma(Pp -> B Anti-B X) At \Sqrt(S)=7 Tev In The Forward Region, Raymond Mountain, Marina Artuso, S. Blusk, Alessandra Borgia
Measurement Of Sigma(Pp -> B Anti-B X) At \Sqrt(S)=7 Tev In The Forward Region, Raymond Mountain, Marina Artuso, S. Blusk, Alessandra Borgia
Physics - All Scholarship
Decays of b hadrons into final states containing a D0 meson and a muon are used to measure the b anti-b production cross-section in proton-proton collisions at a centre-of-mass energy of 7 TeV at the LHC. In the pseudorapidity interval 2 < eta < 6 and integrated over all transverse momenta we find that the average cross-section to produce b-flavoured or anti-b-flavoured hadrons is (75.3 +/- 5.4 +/- 13.0) microbarns.
Instabilities And Oscillations In Isotropic Active Gels, Shiladitya Banerjee, M. Cristina Marchetti
Instabilities And Oscillations In Isotropic Active Gels, Shiladitya Banerjee, M. Cristina Marchetti
Physics - All Scholarship
We present a generic formulation of the continuum elasticity of an isotropic crosslinked active gel. The gel is described by a two-component model consisting of an elastic network coupled frictionally to a permeating fluid. Activity is induced by active crosslinkers that undergo an ATP-activated cycle and transmit forces to the network. The on/off dynamics of the active crosslinkers is described via rate equations for unbound and bound motors. For large activity motors yield a contractile instability of the network. At smaller values of activity, the on/off motor dynamics provides an effective inertial drag on the network that opposes elastic restoring …
Gauge Theory Duals Of Black Hole - Black String Transitions Of Gravitational Theories On A Circle, Simon Catterall, Anosh Joseph, Toby Wiseman
Gauge Theory Duals Of Black Hole - Black String Transitions Of Gravitational Theories On A Circle, Simon Catterall, Anosh Joseph, Toby Wiseman
Physics - All Scholarship
We study the black hole - black string phase transitions of gravitational theories compactified on a circle using the holographic duality conjecture. The gauge theory duals of these theories are maximally supersymmetric and strongly coupled 1 + 1 dimensional SU(N) Yang-Mills theories compactified on a circle, in the large N limit. We perform the strongly coupled finite temperature gauge theory calculations on a lattice, using the recently developed exact lattice supersymmetry methods based on topological twisting and orbifolding. The spatial Polyakov line serves as relevant order parameter of the confinement - deconfinement phase transitions in the gauge theory duals.
Thermal Phases Of D1-Branes On A Circle From Lattice Super Yang-Mills, Simon Catterall, Anosh Joseph, Toby Wiseman
Thermal Phases Of D1-Branes On A Circle From Lattice Super Yang-Mills, Simon Catterall, Anosh Joseph, Toby Wiseman
Physics - All Scholarship
We report on the results of numerical simulations of 1+1 dimensional SU(N) Yang-Mills theory with maximal supersymmetry at finite temperature and compactified on a circle. For large N this system is thought to provide a dual description of the decoupling limit of N coincident D1-branes on a circle. It has been proposed that at large N there is a phase transition at strong coupling related to the Gregory-Laflamme (GL) phase transition in the holographic gravity dual. In a high temperature limit there was argued to be a deconfinement transition associated to the spatial Polyakov loop, and it has been proposed …
Prompt K0s Production In Pp Collisions At √S=0.9 Tev, Raymond Mountain, Marina Artuso, S. Blusk, Alessandra Borgia
Prompt K0s Production In Pp Collisions At √S=0.9 Tev, Raymond Mountain, Marina Artuso, S. Blusk, Alessandra Borgia
Physics - All Scholarship
The production of K_short mesons in pp collisions at a centre-of-mass energy of 0.9 TeV is studied with the LHCb detector at the Large Hadron Collider. The luminosity of the analysed sample is determined using a novel technique, involving measurements of the beam currents, sizes and positions, and is found to be 6.8 +/- 1.0 microbarn^-1. The differential prompt K_short production cross-section is measured as a function of the K_short transverse momentum and rapidity in the region 0 < pT < 1.6 GeV/c and 2.5 < y < 4.0. The data are found to be in reasonable agreement with previous measurements and generator expectations.
Prompt K_Short Production In Pp Collisions At Sqrt(S)=0.9 Tev, Raymond Mountain, Marina Artuso, S. Blusk, Alessandra Borgia
Prompt K_Short Production In Pp Collisions At Sqrt(S)=0.9 Tev, Raymond Mountain, Marina Artuso, S. Blusk, Alessandra Borgia
Physics - All Scholarship
The production of K_short mesons in pp collisions at a centre-of-mass energy of 0.9 TeV is studied with the LHCb detector at the Large Hadron Collider. The luminosity of the analysed sample is determined using a novel technique, involving measurements of the beam currents, sizes and positions, and is found to be 6.8 +/- 1.0 microbarn^-1. The differential prompt K_short production cross-section is measured as a function of the K_short transverse momentum and rapidity in the region 0 < pT < 1.6 GeV/c and 2.5 < y < 4.0. The data are found to be in reasonable agreement with previous measurements and generator expectations.
First Search For Gravitational Waves From The Youngest Known Neutron Star, Duncan Brown, J. Abadie
First Search For Gravitational Waves From The Youngest Known Neutron Star, Duncan Brown, J. Abadie
Physics - All Scholarship
We present a search for periodic gravitational waves from the neutron star in the supernova remnant Cassiopeia A. The search coherently analyzes data in a 12-day interval taken from the fifth science run of the Laser Interferometer Gravitational-Wave Observatory. It searches gravitational wave frequencies from 100 to 300 Hz, and covers a wide range of first and second frequency derivatives appropriate for the age of the remnant and for different spin-down mechanisms. No gravitational wave signal was detected. Within the range of search frequencies, we set 95% confidence upper limits of 0.7--1.2e-24 on the intrinsic gravitational wave strain, 0.4--4e-4 on …
Nonperturbative Results For Yang-Mills Theories, Joseph Schechter, Francesco Sannino
Nonperturbative Results For Yang-Mills Theories, Joseph Schechter, Francesco Sannino
Physics - All Scholarship
Some non perturbative aspects of the pure SU(3) Yang-Mills theory are investigated assuming a specific form of the beta function, based on a recent modification by Ryttov and Sannino of the known one for supersymmetric gauge theories. The characteristic feature is a pole at a particular value of the coupling constant, g. First it is noted, using dimensional analysis, that physical quantities behave smoothly as one travels from one side of the pole to the other. Then it is argued that the form of the integrated beta function g(m), where m is the mass scale, determines the mass gap of …
Microstrip Superconducting Quantum Interference Device Amplifiers With Submicron Josephson Junctions: Enhanced Gain At Gigahertz Frequencies, Britton Plourde, M. P. Defeo, P. Bhupathi, Kang Yu, T. W. Heitmann
Microstrip Superconducting Quantum Interference Device Amplifiers With Submicron Josephson Junctions: Enhanced Gain At Gigahertz Frequencies, Britton Plourde, M. P. Defeo, P. Bhupathi, Kang Yu, T. W. Heitmann
Physics - All Scholarship
We present measurements of an amplifier based on a dc superconducting quantum interference device (SQUID) with submicron Al-AlOx-Al Josephson junctions. The small junction size reduces their self-capacitance and allows for the use of relatively large resistive shunts while maintaining nonhysteretic operation. This leads to an enhancement of the SQUID transfer function compared to SQUIDs with micron-scale junctions. The device layout is modified from that of a conventional SQUID to allow for coupling signals into the amplifier with a substantial mutual inductance for a relatively short microstrip coil. Measurements at 310 mK exhibit gain of 32 dB at 1.55 GHz.
First Results From Lattice Simulation Of The Pwmm, Simon Catterall, Greg Van Anders
First Results From Lattice Simulation Of The Pwmm, Simon Catterall, Greg Van Anders
Physics - All Scholarship
We present results of lattice simulations of the Plane Wave Matrix Model (PWMM). The PWMM is a theory of supersymmetric quantum mechanics that has a well-defined canonical ensemble. We simulate this theory by applying rational hybrid Monte Carlo techniques to a naive lattice action. We examine the strong coupling behaviour of the model focussing on the deconfinement transition.
Calibration Of The Ligo Gravitational Wave Detectors In The Fifth Science Run, Duncan Brown, J. Abadie
Calibration Of The Ligo Gravitational Wave Detectors In The Fifth Science Run, Duncan Brown, J. Abadie
Physics - All Scholarship
The Laser Interferometer Gravitational Wave Observatory (LIGO) is a network of three detectors built to detect local perturbations in the space-time metric from astrophysical sources. These detectors, two in Hanford, WA and one in Livingston, LA, are power-recycled Fabry-Perot Michelson interferometers. In their fifth science run (S5), between November 2005 and October 2007, these detectors accumulated one year of triple coincident data while operating at their designed sensitivity. In this paper, we describe the calibration of the instruments in the S5 data set, including measurement techniques and uncertainty estimation.