title: New Results from the Search for Low-Mass Weakly Interacting Massive Particles with the CDMS Low Ionization Threshold Experiment.
abstract: The CDMS low ionization threshold experiment (CDMSlite) uses cryogenic germanium detectors operated at a relatively high bias voltage to amplify the phonon signal in the search for weakly interacting massive particles (WIMPs). Results are presented from the second CDMSlite run with an exposure of 70 kg day, which reached an energy threshold for electron recoils as low as 56 eV. A fiducialization cut reduces backgrounds below those previously reported by CDMSlite. New parameter space for the WIMP-nucleon spin-independent cross section is excluded for WIMP masses between 1.6 and 5.5  GeV/c^{2}.
authors.affiliation: Department of Physics, University of Florida, Gainesville, Florida 32611, USA.
authors.forename: R
authors.initials: R
authors.lastname: Agnese
authors.affiliation: Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA.
authors.forename: A J
authors.initials: AJ
authors.lastname: Anderson
authors.affiliation: SLAC National Accelerator Laboratory/Kavli Institute for Particle Astrophysics and Cosmology, 2575 Sand Hill Road, Menlo Park, California 94025, USA.
authors.forename: T
authors.initials: T
authors.lastname: Aramaki
authors.affiliation: SLAC National Accelerator Laboratory/Kavli Institute for Particle Astrophysics and Cosmology, 2575 Sand Hill Road, Menlo Park, California 94025, USA.
authors.forename: M
authors.initials: M
authors.lastname: Asai
authors.affiliation: Department of Physics and Astronomy, and the Mitchell Institute for Fundamental Physics and Astronomy, Texas A&M University, College Station, Texas 77843, USA.
authors.forename: W
authors.initials: W
authors.lastname: Baker
authors.affiliation: Department of Physics, University of Florida, Gainesville, Florida 32611, USA.
authors.forename: D
authors.initials: D
authors.lastname: Balakishiyeva
authors.affiliation: School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA.
authors.forename: D
authors.initials: D
authors.lastname: Barker
authors.affiliation: Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA.|Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA.
authors.forename: R
authors.initials: R
authors.lastname: Basu Thakur
authors.affiliation: Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA.
authors.forename: D A
authors.initials: DA
authors.lastname: Bauer
authors.affiliation: Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
authors.forename: J
authors.initials: J
authors.lastname: Billard
authors.affiliation: SLAC National Accelerator Laboratory/Kavli Institute for Particle Astrophysics and Cosmology, 2575 Sand Hill Road, Menlo Park, California 94025, USA.
authors.forename: A
authors.initials: A
authors.lastname: Borgland
authors.affiliation: Department of Physics, Syracuse University, Syracuse, New York 13244, USA.
authors.forename: M A
authors.initials: MA
authors.lastname: Bowles
authors.affiliation: SLAC National Accelerator Laboratory/Kavli Institute for Particle Astrophysics and Cosmology, 2575 Sand Hill Road, Menlo Park, California 94025, USA.
authors.forename: P L
authors.initials: PL
authors.lastname: Brink
authors.affiliation: Department of Physics, South Dakota School of Mines and Technology, Rapid City, South Dakota 57701, USA.
authors.forename: R
authors.initials: R
authors.lastname: Bunker
authors.affiliation: Department of Physics, Stanford University, Stanford, California 94305, USA.
authors.forename: B
authors.initials: B
authors.lastname: Cabrera
authors.affiliation: Department of Physics, University of California, Santa Barbara, California 93106, USA.
authors.forename: D O
authors.initials: DO
authors.lastname: Caldwell
authors.affiliation: Department of Physics, Southern Methodist University, Dallas, Texas 75275, USA.
authors.forename: R
authors.initials: R
authors.lastname: Calkins
authors.affiliation: Institute for Particle Physics Phenomenology, Department of Physics, Durham University, Durham DH1 3LE, United Kingdom.
authors.forename: D G
authors.initials: DG
authors.lastname: Cerdeno
authors.affiliation: School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA.
authors.forename: H
authors.initials: H
authors.lastname: Chagani
authors.affiliation: Department of Physics, Syracuse University, Syracuse, New York 13244, USA.
authors.forename: Y
authors.initials: Y
authors.lastname: Chen
authors.affiliation: Department of Physics, Southern Methodist University, Dallas, Texas 75275, USA.
authors.forename: J
authors.initials: J
authors.lastname: Cooley
authors.affiliation: Division of Physics, Mathematics and Astronomy, California Institute of Technology, Pasadena, California 91125, USA.
authors.forename: B
authors.initials: B
authors.lastname: Cornell
authors.affiliation: School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA.
authors.forename: P
authors.initials: P
authors.lastname: Cushman
authors.affiliation: Department of Physics, University of California, Berkeley, California 94720, USA.
authors.forename: M
authors.initials: M
authors.lastname: Daal
authors.affiliation: Department of Physics, Queen's University, Kingston, Ontario K7L 3N6, Canada.
authors.forename: P C F
authors.initials: PC
authors.lastname: Di Stefano
authors.affiliation: Department of Physics, University of California, Berkeley, California 94720, USA.
authors.forename: T
authors.initials: T
authors.lastname: Doughty
authors.affiliation: Departamento de Física Teórica and Instituto de Física Teórica UAM/CSIC, Universidad Autónoma de Madrid, 28049 Madrid, Spain.
authors.forename: L
authors.initials: L
authors.lastname: Esteban
authors.affiliation: School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA.
authors.forename: S
authors.initials: S
authors.lastname: Fallows
authors.affiliation: Department of Physics & Astronomy, Northwestern University, Evanston, Illinois 60208-3112, USA.
authors.forename: E
authors.initials: E
authors.lastname: Figueroa-Feliciano
authors.affiliation: Department of Physics, Queen's University, Kingston, Ontario K7L 3N6, Canada.
authors.forename: M
authors.initials: M
authors.lastname: Ghaith
authors.affiliation: SLAC National Accelerator Laboratory/Kavli Institute for Particle Astrophysics and Cosmology, 2575 Sand Hill Road, Menlo Park, California 94025, USA.
authors.forename: G L
authors.initials: GL
authors.lastname: Godfrey
authors.affiliation: Division of Physics, Mathematics and Astronomy, California Institute of Technology, Pasadena, California 91125, USA.
authors.forename: S R
authors.initials: SR
authors.lastname: Golwala
authors.affiliation: Pacific Northwest National Laboratory, Richland, Washington 99352, USA.
authors.forename: J
authors.initials: J
authors.lastname: Hall
authors.affiliation: Department of Physics and Astronomy, and the Mitchell Institute for Fundamental Physics and Astronomy, Texas A&M University, College Station, Texas 77843, USA.
authors.forename: H R
authors.initials: HR
authors.lastname: Harris
authors.affiliation: School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA.
authors.forename: T
authors.initials: T
authors.lastname: Hofer
authors.affiliation: Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA.
authors.forename: D
authors.initials: D
authors.lastname: Holmgren
authors.affiliation: Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA.
authors.forename: L
authors.initials: L
authors.lastname: Hsu
authors.affiliation: Department of Physics, University of Colorado Denver, Denver, Colorado 80217, USA.
authors.forename: M E
authors.initials: ME
authors.lastname: Huber
authors.affiliation: Department of Physics, Southern Methodist University, Dallas, Texas 75275, USA.
authors.forename: D
authors.initials: D
authors.lastname: Jardin
authors.affiliation: Department of Physics and Astronomy, and the Mitchell Institute for Fundamental Physics and Astronomy, Texas A&M University, College Station, Texas 77843, USA.
authors.forename: A
authors.initials: A
authors.lastname: Jastram
authors.affiliation: Department of Physics, Queen's University, Kingston, Ontario K7L 3N6, Canada.
authors.forename: O
authors.initials: O
authors.lastname: Kamaev
authors.affiliation: Department of Physics, Southern Methodist University, Dallas, Texas 75275, USA.
authors.forename: B
authors.initials: B
authors.lastname: Kara
authors.affiliation: SLAC National Accelerator Laboratory/Kavli Institute for Particle Astrophysics and Cosmology, 2575 Sand Hill Road, Menlo Park, California 94025, USA.
authors.forename: M H
authors.initials: MH
authors.lastname: Kelsey
authors.affiliation: School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA.
authors.forename: A
authors.initials: A
authors.lastname: Kennedy
authors.affiliation: Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
authors.forename: A
authors.initials: A
authors.lastname: Leder
authors.affiliation: Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA.
authors.forename: B
authors.initials: B
authors.lastname: Loer
authors.affiliation: Departamento de Física Teórica and Instituto de Física Teórica UAM/CSIC, Universidad Autónoma de Madrid, 28049 Madrid, Spain.
authors.forename: E
authors.initials: E
authors.lastname: Lopez Asamar
authors.affiliation: Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA.
authors.forename: P
authors.initials: P
authors.lastname: Lukens
authors.affiliation: Department of Physics and Astronomy, and the Mitchell Institute for Fundamental Physics and Astronomy, Texas A&M University, College Station, Texas 77843, USA.
authors.forename: R
authors.initials: R
authors.lastname: Mahapatra
authors.affiliation: School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA.
authors.forename: V
authors.initials: V
authors.lastname: Mandic
authors.affiliation: School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA.
authors.forename: N
authors.initials: N
authors.lastname: Mast
authors.affiliation: Department of Physics, University of California, Berkeley, California 94720, USA.
authors.forename: N
authors.initials: N
authors.lastname: Mirabolfathi
authors.affiliation: Department of Physics, Stanford University, Stanford, California 94305, USA.
authors.forename: R A
authors.initials: RA
authors.lastname: Moffatt
authors.affiliation: Department of Physics and Astronomy, and the Mitchell Institute for Fundamental Physics and Astronomy, Texas A&M University, College Station, Texas 77843, USA.
authors.forename: J D
authors.initials: JD
authors.lastname: Morales Mendoza
authors.affiliation: Department of Physics & Astronomy, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada.
authors.forename: S M
authors.initials: SM
authors.lastname: Oser
authors.affiliation: Department of Physics, Queen's University, Kingston, Ontario K7L 3N6, Canada.
authors.forename: K
authors.initials: K
authors.lastname: Page
authors.affiliation: Department of Physics & Astronomy, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada.
authors.forename: W A
authors.initials: WA
authors.lastname: Page
authors.affiliation: SLAC National Accelerator Laboratory/Kavli Institute for Particle Astrophysics and Cosmology, 2575 Sand Hill Road, Menlo Park, California 94025, USA.
authors.forename: R
authors.initials: R
authors.lastname: Partridge
authors.affiliation: School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA.
authors.forename: M
authors.initials: M
authors.lastname: Pepin
authors.affiliation: Department of Physics, University of California, Berkeley, California 94720, USA.
authors.forename: A
authors.initials: A
authors.lastname: Phipps
authors.affiliation: Department of Physics and Astronomy, and the Mitchell Institute for Fundamental Physics and Astronomy, Texas A&M University, College Station, Texas 77843, USA.
authors.forename: K
authors.initials: K
authors.lastname: Prasad
authors.affiliation: Department of Physics, University of California, Berkeley, California 94720, USA.
authors.forename: M
authors.initials: M
authors.lastname: Pyle
authors.affiliation: Department of Physics, Southern Methodist University, Dallas, Texas 75275, USA.
authors.forename: H
authors.initials: H
authors.lastname: Qiu
authors.affiliation: Department of Physics, Queen's University, Kingston, Ontario K7L 3N6, Canada.
authors.forename: W
authors.initials: W
authors.lastname: Rau
authors.affiliation: Department of Physics, Stanford University, Stanford, California 94305, USA.
authors.forename: P
authors.initials: P
authors.lastname: Redl
authors.affiliation: Department of Physics, University of Evansville, Evansville, Indiana 47722, USA.
authors.forename: A
authors.initials: A
authors.lastname: Reisetter
authors.affiliation: Department of Physics, Queen's University, Kingston, Ontario K7L 3N6, Canada.
authors.forename: Y
authors.initials: Y
authors.lastname: Ricci
authors.affiliation: Department of Physics, University of South Dakota, Vermillion, South Dakota 57069, USA.
authors.forename: A
authors.initials: A
authors.lastname: Roberts
authors.affiliation: School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA.
authors.forename: H E
authors.initials: HE
authors.lastname: Rogers
authors.affiliation: Department of Physics, University of Florida, Gainesville, Florida 32611, USA.
authors.forename: T
authors.initials: T
authors.lastname: Saab
authors.affiliation: Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.|Department of Physics, University of California, Berkeley, California 94720, USA.
authors.forename: B
authors.initials: B
authors.lastname: Sadoulet
authors.affiliation: Department of Physics, University of South Dakota, Vermillion, South Dakota 57069, USA.
authors.forename: J
authors.initials: J
authors.lastname: Sander
authors.affiliation: SLAC National Accelerator Laboratory/Kavli Institute for Particle Astrophysics and Cosmology, 2575 Sand Hill Road, Menlo Park, California 94025, USA.
authors.forename: K
authors.initials: K
authors.lastname: Schneck
authors.affiliation: Department of Physics, South Dakota School of Mines and Technology, Rapid City, South Dakota 57701, USA.
authors.forename: R W
authors.initials: RW
authors.lastname: Schnee
authors.affiliation: Department of Physics, Southern Methodist University, Dallas, Texas 75275, USA.
authors.forename: S
authors.initials: S
authors.lastname: Scorza
authors.affiliation: Department of Physics, University of California, Berkeley, California 94720, USA.
authors.forename: B
authors.initials: B
authors.lastname: Serfass
authors.affiliation: Department of Physics, Stanford University, Stanford, California 94305, USA.
authors.forename: B
authors.initials: B
authors.lastname: Shank
authors.affiliation: Department of Physics, University of California, Berkeley, California 94720, USA.
authors.forename: D
authors.initials: D
authors.lastname: Speller
authors.affiliation: Department of Physics and Astronomy, and the Mitchell Institute for Fundamental Physics and Astronomy, Texas A&M University, College Station, Texas 77843, USA.
authors.forename: D
authors.initials: D
authors.lastname: Toback
authors.affiliation: Department of Physics, Queen's University, Kingston, Ontario K7L 3N6, Canada.
authors.forename: R
authors.initials: R
authors.lastname: Underwood
authors.affiliation: Department of Physics and Astronomy, and the Mitchell Institute for Fundamental Physics and Astronomy, Texas A&M University, College Station, Texas 77843, USA.
authors.forename: S
authors.initials: S
authors.lastname: Upadhyayula
authors.affiliation: School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA.
authors.forename: A N
authors.initials: AN
authors.lastname: Villano
authors.affiliation: Department of Physics, University of Florida, Gainesville, Florida 32611, USA.
authors.forename: B
authors.initials: B
authors.lastname: Welliver
authors.affiliation: Department of Physics and Astronomy, and the Mitchell Institute for Fundamental Physics and Astronomy, Texas A&M University, College Station, Texas 77843, USA.
authors.forename: J S
authors.initials: JS
authors.lastname: Wilson
authors.affiliation: SLAC National Accelerator Laboratory/Kavli Institute for Particle Astrophysics and Cosmology, 2575 Sand Hill Road, Menlo Park, California 94025, USA.
authors.forename: D H
authors.initials: DH
authors.lastname: Wright
authors.affiliation: Department of Physics, Stanford University, Stanford, California 94305, USA.
authors.forename: S
authors.initials: S
authors.lastname: Yellin
authors.affiliation: Department of Physics, Stanford University, Stanford, California 94305, USA.
authors.forename: J J
authors.initials: JJ
authors.lastname: Yen
authors.affiliation: Department of Physics, Santa Clara University, Santa Clara, California 95053, USA.
authors.forename: B A
authors.initials: BA
authors.lastname: Young
authors.affiliation: School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA.
authors.forename: J
authors.initials: J
authors.lastname: Zhang