title: Improved Limits on Scattering of Weakly Interacting Massive Particles from Reanalysis of 2013 LUX Data.
abstract: We present constraints on weakly interacting massive particles (WIMP)-nucleus scattering from the 2013 data of the Large Underground Xenon dark matter experiment, including 1.4×10^{4}  kg day of search exposure. This new analysis incorporates several advances: single-photon calibration at the scintillation wavelength, improved event-reconstruction algorithms, a revised background model including events originating on the detector walls in an enlarged fiducial volume, and new calibrations from decays of an injected tritium β source and from kinematically constrained nuclear recoils down to 1.1 keV. Sensitivity, especially to low-mass WIMPs, is enhanced compared to our previous results which modeled the signal only above a 3 keV minimum energy. Under standard dark matter halo assumptions and in the mass range above 4  GeV c^{-2}, these new results give the most stringent direct limits on the spin-independent WIMP-nucleon cross section. The 90% C.L. upper limit has a minimum of 0.6 zb at 33  GeV c^{-2} WIMP mass.
authors.affiliation: Case Western Reserve University, Department of Physics, 10900 Euclid Ave, Cleveland, Ohio 44106, USA.|SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94205, USA.|Kavli Institute for Particle Astrophysics and Cosmology, Stanford University, 452 Lomita Mall, Stanford, California 94309, USA.
authors.forename: D S
authors.initials: DS
authors.lastname: Akerib
authors.affiliation: Imperial College London, High Energy Physics, Blackett Laboratory, London SW7 2BZ, United Kingdom.
authors.forename: H M
authors.initials: HM
authors.lastname: Araújo
authors.affiliation: South Dakota School of Mines and Technology, 501 East St Joseph St., Rapid City, South Dakota 57701, USA.
authors.forename: X
authors.initials: X
authors.lastname: Bai
authors.affiliation: Imperial College London, High Energy Physics, Blackett Laboratory, London SW7 2BZ, United Kingdom.
authors.forename: A J
authors.initials: AJ
authors.lastname: Bailey
authors.affiliation: University of Maryland, Department of Physics, College Park, Maryland 20742, USA.
authors.forename: J
authors.initials: J
authors.lastname: Balajthy
authors.affiliation: SUPA, School of Physics and Astronomy, University of Edinburgh, Edinburgh EH9 3FD, United Kingdom.
authors.forename: P
authors.initials: P
authors.lastname: Beltrame
authors.affiliation: Yale University, Department of Physics, 217 Prospect St., New Haven, Connecticut 06511, USA.
authors.forename: E P
authors.initials: EP
authors.lastname: Bernard
authors.affiliation: Lawrence Livermore National Laboratory, 7000 East Ave., Livermore, California 94551, USA.
authors.forename: A
authors.initials: A
authors.lastname: Bernstein
authors.affiliation: Case Western Reserve University, Department of Physics, 10900 Euclid Ave, Cleveland, Ohio 44106, USA.|SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94205, USA.|Kavli Institute for Particle Astrophysics and Cosmology, Stanford University, 452 Lomita Mall, Stanford, California 94309, USA.
authors.forename: T P
authors.initials: TP
authors.lastname: Biesiadzinski
authors.affiliation: Yale University, Department of Physics, 217 Prospect St., New Haven, Connecticut 06511, USA.
authors.forename: E M
authors.initials: EM
authors.lastname: Boulton
authors.affiliation: Case Western Reserve University, Department of Physics, 10900 Euclid Ave, Cleveland, Ohio 44106, USA.
authors.forename: A
authors.initials: A
authors.lastname: Bradley
authors.affiliation: Case Western Reserve University, Department of Physics, 10900 Euclid Ave, Cleveland, Ohio 44106, USA.|SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94205, USA.|Kavli Institute for Particle Astrophysics and Cosmology, Stanford University, 452 Lomita Mall, Stanford, California 94309, USA.
authors.forename: R
authors.initials: R
authors.lastname: Bramante
authors.affiliation: Yale University, Department of Physics, 217 Prospect St., New Haven, Connecticut 06511, USA.
authors.forename: S B
authors.initials: SB
authors.lastname: Cahn
authors.affiliation: University of California Santa Barbara, Department of Physics, Santa Barbara, California 93106, USA.
authors.forename: M C
authors.initials: MC
authors.lastname: Carmona-Benitez
authors.affiliation: Brown University, Department of Physics, 182 Hope St., Providence, Rhode Island 02912, USA.
authors.forename: C
authors.initials: C
authors.lastname: Chan
authors.affiliation: Brown University, Department of Physics, 182 Hope St., Providence, Rhode Island 02912, USA.
authors.forename: J J
authors.initials: JJ
authors.lastname: Chapman
authors.affiliation: University of South Dakota, Department of Physics, 414E Clark St., Vermillion, South Dakota 57069, USA.
authors.forename: A A
authors.initials: AA
authors.lastname: Chiller
authors.affiliation: University of South Dakota, Department of Physics, 414E Clark St., Vermillion, South Dakota 57069, USA.
authors.forename: C
authors.initials: C
authors.lastname: Chiller
authors.affiliation: Imperial College London, High Energy Physics, Blackett Laboratory, London SW7 2BZ, United Kingdom.
authors.forename: A
authors.initials: A
authors.lastname: Currie
authors.affiliation: University of California Davis, Department of Physics, One Shields Ave., Davis, California 95616, USA.
authors.forename: J E
authors.initials: JE
authors.lastname: Cutter
authors.affiliation: SUPA, School of Physics and Astronomy, University of Edinburgh, Edinburgh EH9 3FD, United Kingdom.
authors.forename: T J R
authors.initials: TJ
authors.lastname: Davison
authors.affiliation: LIP-Coimbra, Department of Physics, University of Coimbra, Rua Larga, 3004-516 Coimbra, Portugal.
authors.forename: L
authors.initials: L
authors.lastname: de Viveiros
authors.affiliation: Lawrence Berkeley National Laboratory, 1 Cyclotron Rd., Berkeley, California 94720, USA.
authors.forename: A
authors.initials: A
authors.lastname: Dobi
authors.affiliation: Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, United Kingdom.
authors.forename: J E Y
authors.initials: JE
authors.lastname: Dobson
authors.affiliation: University of Rochester, Department of Physics and Astronomy, Rochester, New York 14627, USA.
authors.forename: E
authors.initials: E
authors.lastname: Druszkiewicz
authors.affiliation: Yale University, Department of Physics, 217 Prospect St., New Haven, Connecticut 06511, USA.
authors.forename: B N
authors.initials: BN
authors.lastname: Edwards
authors.affiliation: Lawrence Berkeley National Laboratory, 1 Cyclotron Rd., Berkeley, California 94720, USA.
authors.forename: C H
authors.initials: CH
authors.lastname: Faham
authors.affiliation: Lawrence Berkeley National Laboratory, 1 Cyclotron Rd., Berkeley, California 94720, USA.
authors.forename: S
authors.initials: S
authors.lastname: Fiorucci
authors.affiliation: Brown University, Department of Physics, 182 Hope St., Providence, Rhode Island 02912, USA.
authors.forename: R J
authors.initials: RJ
authors.lastname: Gaitskell
authors.affiliation: Lawrence Berkeley National Laboratory, 1 Cyclotron Rd., Berkeley, California 94720, USA.
authors.forename: V M
authors.initials: VM
authors.lastname: Gehman
authors.affiliation: Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, United Kingdom.
authors.forename: C
authors.initials: C
authors.lastname: Ghag
authors.affiliation: Case Western Reserve University, Department of Physics, 10900 Euclid Ave, Cleveland, Ohio 44106, USA.
authors.forename: K R
authors.initials: KR
authors.lastname: Gibson
authors.affiliation: Lawrence Berkeley National Laboratory, 1 Cyclotron Rd., Berkeley, California 94720, USA.
authors.forename: M G D
authors.initials: MG
authors.lastname: Gilchriese
authors.affiliation: University of Maryland, Department of Physics, College Park, Maryland 20742, USA.
authors.forename: C R
authors.initials: CR
authors.lastname: Hall
authors.affiliation: South Dakota School of Mines and Technology, 501 East St Joseph St., Rapid City, South Dakota 57701, USA.|South Dakota Science and Technology Authority, Sanford Underground Research Facility, Lead, South Dakota 57754, USA.
authors.forename: M
authors.initials: M
authors.lastname: Hanhardt
authors.affiliation: University of California Santa Barbara, Department of Physics, Santa Barbara, California 93106, USA.
authors.forename: S J
authors.initials: SJ
authors.lastname: Haselschwardt
authors.affiliation: Yale University, Department of Physics, 217 Prospect St., New Haven, Connecticut 06511, USA.|Lawrence Berkeley National Laboratory, 1 Cyclotron Rd., Berkeley, California 94720, USA.|University of California Berkeley, Department of Physics, Berkeley, California 94720, USA.
authors.forename: S A
authors.initials: SA
authors.lastname: Hertel
authors.affiliation: University of California Berkeley, Department of Physics, Berkeley, California 94720, USA.
authors.forename: D P
authors.initials: DP
authors.lastname: Hogan
authors.affiliation: Yale University, Department of Physics, 217 Prospect St., New Haven, Connecticut 06511, USA.|Lawrence Berkeley National Laboratory, 1 Cyclotron Rd., Berkeley, California 94720, USA.|University of California Berkeley, Department of Physics, Berkeley, California 94720, USA.
authors.forename: M
authors.initials: M
authors.lastname: Horn
authors.affiliation: Brown University, Department of Physics, 182 Hope St., Providence, Rhode Island 02912, USA.
authors.forename: D Q
authors.initials: DQ
authors.lastname: Huang
authors.affiliation: SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94205, USA.|Kavli Institute for Particle Astrophysics and Cosmology, Stanford University, 452 Lomita Mall, Stanford, California 94309, USA.
authors.forename: C M
authors.initials: CM
authors.lastname: Ignarra
authors.affiliation: Lawrence Berkeley National Laboratory, 1 Cyclotron Rd., Berkeley, California 94720, USA.|University of California Berkeley, Department of Physics, Berkeley, California 94720, USA.
authors.forename: M
authors.initials: M
authors.lastname: Ihm
authors.affiliation: Lawrence Berkeley National Laboratory, 1 Cyclotron Rd., Berkeley, California 94720, USA.|University of California Berkeley, Department of Physics, Berkeley, California 94720, USA.
authors.forename: R G
authors.initials: RG
authors.lastname: Jacobsen
authors.affiliation: Case Western Reserve University, Department of Physics, 10900 Euclid Ave, Cleveland, Ohio 44106, USA.|SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94205, USA.|Kavli Institute for Particle Astrophysics and Cosmology, Stanford University, 452 Lomita Mall, Stanford, California 94309, USA.
authors.forename: W
authors.initials: W
authors.lastname: Ji
authors.affiliation: Lawrence Livermore National Laboratory, 7000 East Ave., Livermore, California 94551, USA.
authors.forename: K
authors.initials: K
authors.lastname: Kazkaz
authors.affiliation: University of Rochester, Department of Physics and Astronomy, Rochester, New York 14627, USA.
authors.forename: D
authors.initials: D
authors.lastname: Khaitan
authors.affiliation: University of Maryland, Department of Physics, College Park, Maryland 20742, USA.
authors.forename: R
authors.initials: R
authors.lastname: Knoche
authors.affiliation: Yale University, Department of Physics, 217 Prospect St., New Haven, Connecticut 06511, USA.
authors.forename: N A
authors.initials: NA
authors.lastname: Larsen
authors.affiliation: Case Western Reserve University, Department of Physics, 10900 Euclid Ave, Cleveland, Ohio 44106, USA.|SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94205, USA.|Kavli Institute for Particle Astrophysics and Cosmology, Stanford University, 452 Lomita Mall, Stanford, California 94309, USA.
authors.forename: C
authors.initials: C
authors.lastname: Lee
authors.affiliation: Lawrence Livermore National Laboratory, 7000 East Ave., Livermore, California 94551, USA.|University of California Davis, Department of Physics, One Shields Ave., Davis, California 95616, USA.
authors.forename: B G
authors.initials: BG
authors.lastname: Lenardo
authors.affiliation: Lawrence Berkeley National Laboratory, 1 Cyclotron Rd., Berkeley, California 94720, USA.
authors.forename: K T
authors.initials: KT
authors.lastname: Lesko
authors.affiliation: LIP-Coimbra, Department of Physics, University of Coimbra, Rua Larga, 3004-516 Coimbra, Portugal.
authors.forename: A
authors.initials: A
authors.lastname: Lindote
authors.affiliation: LIP-Coimbra, Department of Physics, University of Coimbra, Rua Larga, 3004-516 Coimbra, Portugal.
authors.forename: M I
authors.initials: MI
authors.lastname: Lopes
authors.affiliation: Brown University, Department of Physics, 182 Hope St., Providence, Rhode Island 02912, USA.
authors.forename: D C
authors.initials: DC
authors.lastname: Malling
authors.affiliation: University of California Davis, Department of Physics, One Shields Ave., Davis, California 95616, USA.
authors.forename: A
authors.initials: A
authors.lastname: Manalaysay
authors.affiliation: Texas A&M University, Department of Physics, College Station, Texas 77843, USA.
authors.forename: R L
authors.initials: RL
authors.lastname: Mannino
authors.affiliation: SUPA, School of Physics and Astronomy, University of Edinburgh, Edinburgh EH9 3FD, United Kingdom.
authors.forename: M F
authors.initials: MF
authors.lastname: Marzioni
authors.affiliation: Yale University, Department of Physics, 217 Prospect St., New Haven, Connecticut 06511, USA.|Lawrence Berkeley National Laboratory, 1 Cyclotron Rd., Berkeley, California 94720, USA.|University of California Berkeley, Department of Physics, Berkeley, California 94720, USA.
authors.forename: D N
authors.initials: DN
authors.lastname: McKinsey
authors.affiliation: University of South Dakota, Department of Physics, 414E Clark St., Vermillion, South Dakota 57069, USA.
authors.forename: D-M
authors.initials: DM
authors.lastname: Mei
authors.affiliation: University at Albany, State University of New York, Department of Physics, 1400 Washington Avenue, Albany, New York 12222, USA.
authors.forename: J
authors.initials: J
authors.lastname: Mock
authors.affiliation: University of Rochester, Department of Physics and Astronomy, Rochester, New York 14627, USA.
authors.forename: M
authors.initials: M
authors.lastname: Moongweluwan
authors.affiliation: University of California Davis, Department of Physics, One Shields Ave., Davis, California 95616, USA.
authors.forename: J A
authors.initials: JA
authors.lastname: Morad
authors.affiliation: SUPA, School of Physics and Astronomy, University of Edinburgh, Edinburgh EH9 3FD, United Kingdom.
authors.forename: A St J
authors.initials: AS
authors.lastname: Murphy
authors.affiliation: University of California Santa Barbara, Department of Physics, Santa Barbara, California 93106, USA.
authors.forename: C
authors.initials: C
authors.lastname: Nehrkorn
authors.affiliation: University of California Santa Barbara, Department of Physics, Santa Barbara, California 93106, USA.
authors.forename: H N
authors.initials: HN
authors.lastname: Nelson
authors.affiliation: LIP-Coimbra, Department of Physics, University of Coimbra, Rua Larga, 3004-516 Coimbra, Portugal.
authors.forename: F
authors.initials: F
authors.lastname: Neves
authors.affiliation: Yale University, Department of Physics, 217 Prospect St., New Haven, Connecticut 06511, USA.|Lawrence Berkeley National Laboratory, 1 Cyclotron Rd., Berkeley, California 94720, USA.|University of California Berkeley, Department of Physics, Berkeley, California 94720, USA.
authors.forename: K
authors.initials: K
authors.lastname: O'Sullivan
authors.affiliation: Lawrence Berkeley National Laboratory, 1 Cyclotron Rd., Berkeley, California 94720, USA.|University of California Berkeley, Department of Physics, Berkeley, California 94720, USA.
authors.forename: K C
authors.initials: KC
authors.lastname: Oliver-Mallory
authors.affiliation: University of California Davis, Department of Physics, One Shields Ave., Davis, California 95616, USA.
authors.forename: R A
authors.initials: RA
authors.lastname: Ott
authors.affiliation: SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94205, USA.|Kavli Institute for Particle Astrophysics and Cosmology, Stanford University, 452 Lomita Mall, Stanford, California 94309, USA.|University of Wisconsin-Madison, Department of Physics, 1150 University Avenue, Madison, Wisconsin 53706, USA.
authors.forename: K J
authors.initials: KJ
authors.lastname: Palladino
authors.affiliation: Brown University, Department of Physics, 182 Hope St., Providence, Rhode Island 02912, USA.
authors.forename: M
authors.initials: M
authors.lastname: Pangilinan
authors.affiliation: Yale University, Department of Physics, 217 Prospect St., New Haven, Connecticut 06511, USA.|Lawrence Berkeley National Laboratory, 1 Cyclotron Rd., Berkeley, California 94720, USA.|University of California Berkeley, Department of Physics, Berkeley, California 94720, USA.
authors.forename: E K
authors.initials: EK
authors.lastname: Pease
authors.affiliation: Case Western Reserve University, Department of Physics, 10900 Euclid Ave, Cleveland, Ohio 44106, USA.
authors.forename: P
authors.initials: P
authors.lastname: Phelps
authors.affiliation: Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, United Kingdom.
authors.forename: L
authors.initials: L
authors.lastname: Reichhart
authors.affiliation: Brown University, Department of Physics, 182 Hope St., Providence, Rhode Island 02912, USA.
authors.forename: C
authors.initials: C
authors.lastname: Rhyne
authors.affiliation: Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, United Kingdom.
authors.forename: S
authors.initials: S
authors.lastname: Shaw
authors.affiliation: Case Western Reserve University, Department of Physics, 10900 Euclid Ave, Cleveland, Ohio 44106, USA.|SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94205, USA.|Kavli Institute for Particle Astrophysics and Cosmology, Stanford University, 452 Lomita Mall, Stanford, California 94309, USA.
authors.forename: T A
authors.initials: TA
authors.lastname: Shutt
authors.affiliation: LIP-Coimbra, Department of Physics, University of Coimbra, Rua Larga, 3004-516 Coimbra, Portugal.
authors.forename: C
authors.initials: C
authors.lastname: Silva
authors.affiliation: LIP-Coimbra, Department of Physics, University of Coimbra, Rua Larga, 3004-516 Coimbra, Portugal.
authors.forename: V N
authors.initials: VN
authors.lastname: Solovov
authors.affiliation: Lawrence Berkeley National Laboratory, 1 Cyclotron Rd., Berkeley, California 94720, USA.
authors.forename: P
authors.initials: P
authors.lastname: Sorensen
authors.affiliation: University of California Davis, Department of Physics, One Shields Ave., Davis, California 95616, USA.
authors.forename: S
authors.initials: S
authors.lastname: Stephenson
authors.affiliation: Imperial College London, High Energy Physics, Blackett Laboratory, London SW7 2BZ, United Kingdom.
authors.forename: T J
authors.initials: TJ
authors.lastname: Sumner
authors.affiliation: University at Albany, State University of New York, Department of Physics, 1400 Washington Avenue, Albany, New York 12222, USA.
authors.forename: M
authors.initials: M
authors.lastname: Szydagis
authors.affiliation: South Dakota Science and Technology Authority, Sanford Underground Research Facility, Lead, South Dakota 57754, USA.
authors.forename: D J
authors.initials: DJ
authors.lastname: Taylor
authors.affiliation: Brown University, Department of Physics, 182 Hope St., Providence, Rhode Island 02912, USA.
authors.forename: W
authors.initials: W
authors.lastname: Taylor
authors.affiliation: Yale University, Department of Physics, 217 Prospect St., New Haven, Connecticut 06511, USA.
authors.forename: B P
authors.initials: BP
authors.lastname: Tennyson
authors.affiliation: Texas A&M University, Department of Physics, College Station, Texas 77843, USA.
authors.forename: P A
authors.initials: PA
authors.lastname: Terman
authors.affiliation: South Dakota School of Mines and Technology, 501 East St Joseph St., Rapid City, South Dakota 57701, USA.
authors.forename: D R
authors.initials: DR
authors.lastname: Tiedt
authors.affiliation: Case Western Reserve University, Department of Physics, 10900 Euclid Ave, Cleveland, Ohio 44106, USA.|SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94205, USA.|Kavli Institute for Particle Astrophysics and Cosmology, Stanford University, 452 Lomita Mall, Stanford, California 94309, USA.
authors.forename: W H
authors.initials: WH
authors.lastname: To
authors.affiliation: University of California Davis, Department of Physics, One Shields Ave., Davis, California 95616, USA.
authors.forename: M
authors.initials: M
authors.lastname: Tripathi
authors.affiliation: Yale University, Department of Physics, 217 Prospect St., New Haven, Connecticut 06511, USA.|Lawrence Berkeley National Laboratory, 1 Cyclotron Rd., Berkeley, California 94720, USA.|University of California Berkeley, Department of Physics, Berkeley, California 94720, USA.
authors.forename: L
authors.initials: L
authors.lastname: Tvrznikova
authors.affiliation: University of California Davis, Department of Physics, One Shields Ave., Davis, California 95616, USA.
authors.forename: S
authors.initials: S
authors.lastname: Uvarov
authors.affiliation: Brown University, Department of Physics, 182 Hope St., Providence, Rhode Island 02912, USA.
authors.forename: J R
authors.initials: JR
authors.lastname: Verbus
authors.affiliation: Texas A&M University, Department of Physics, College Station, Texas 77843, USA.
authors.forename: R C
authors.initials: RC
authors.lastname: Webb
authors.affiliation: Texas A&M University, Department of Physics, College Station, Texas 77843, USA.
authors.forename: J T
authors.initials: JT
authors.lastname: White
authors.affiliation: Case Western Reserve University, Department of Physics, 10900 Euclid Ave, Cleveland, Ohio 44106, USA.|SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94205, USA.|Kavli Institute for Particle Astrophysics and Cosmology, Stanford University, 452 Lomita Mall, Stanford, California 94309, USA.
authors.forename: T J
authors.initials: TJ
authors.lastname: Whitis
authors.affiliation: University of California Santa Barbara, Department of Physics, Santa Barbara, California 93106, USA.
authors.forename: M S
authors.initials: MS
authors.lastname: Witherell
authors.affiliation: University of Rochester, Department of Physics and Astronomy, Rochester, New York 14627, USA.
authors.forename: F L H
authors.initials: FL
authors.lastname: Wolfs
authors.affiliation: Imperial College London, High Energy Physics, Blackett Laboratory, London SW7 2BZ, United Kingdom.
authors.forename: K
authors.initials: K
authors.lastname: Yazdani
authors.affiliation: University at Albany, State University of New York, Department of Physics, 1400 Washington Avenue, Albany, New York 12222, USA.
authors.forename: S K
authors.initials: SK
authors.lastname: Young
authors.affiliation: University of South Dakota, Department of Physics, 414E Clark St., Vermillion, South Dakota 57069, USA.
authors.forename: C
authors.initials: C
authors.lastname: Zhang