title: Probing the repulsive core of the nucleon-nucleon interaction via the (4)He(e,e'pN) triple-coincidence reaction.
abstract: We studied simultaneously the (4)He(e,e'p), (4)He(e,e'pp), and (4)He(e,e'pn) reactions at Q(2)=2(GeV/c)(2) and x(B)>1, for an (e,e'p) missing-momentum range of 400 to 830  MeV/c. The knocked-out proton was detected in coincidence with a proton or neutron recoiling almost back to back to the missing momentum, leaving the residual A=2 system at low excitation energy. These data were used to identify two-nucleon short-range correlated pairs and to deduce their isospin structure as a function of missing momentum, in a region where the nucleon-nucleon (NN) force is expected to change from predominantly tensor to repulsive. The abundance of neutron-proton pairs is reduced as the nucleon momentum increases beyond ∼500  MeV/c. The extracted fraction of proton-proton pairs is small and almost independent of the missing momentum. Our data are compared with calculations of two-nucleon momentum distributions in (4)He and discussed in the context of probing the elusive repulsive component of the NN force.
authors: Tel Aviv University, Tel Aviv 69978, Israel.
authors: I
authors: I
authors: Korover
authors: Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
authors: N
authors: N
authors: Muangma
authors: Tel Aviv University, Tel Aviv 69978, Israel.
authors: O
authors: O
authors: Hen
authors: Tel Aviv University, Tel Aviv 69978, Israel.
authors: R
authors: R
authors: Shneor
authors: Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA and Longwood University, Farmville, Virginia 23909, USA.
authors: V
authors: V
authors: Sulkosky
authors: Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
authors: A
authors: A
authors: Kelleher
authors: Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
authors: S
authors: S
authors: Gilad
authors: Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
authors: D W
authors: DW
authors: Higinbotham
authors: Tel Aviv University, Tel Aviv 69978, Israel.
authors: E
authors: E
authors: Piasetzky
authors: Kent State University, Kent, Ohio 44242, USA.
authors: J W
authors: JW
authors: Watson
authors: Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
authors: S A
authors: SA
authors: Wood
authors: Institut de Physique Nucléaire (UMR 8608), CNRS/IN2P3-Université Paris-Sud, F-91406 Orsay Cedex, France.
authors: P
authors: P
authors: Aguilera
authors: Syracuse University, Syracuse, New York 13244, USA.
authors: Z
authors: Z
authors: Ahmed
authors: Old Dominion University, Norfolk, Virginia 23529, USA.
authors: H
authors: H
authors: Albataineh
authors: University of Kentucky, Lexington, Kentucky 40506, USA.
authors: K
authors: K
authors: Allada
authors: Kent State University, Kent, Ohio 44242, USA.
authors: B
authors: B
authors: Anderson
authors: Saint Mary's University, Halifax, Nova Scotia, Canada.
authors: D
authors: D
authors: Anez
authors: California State University, Los Angeles, Los Angeles, California 90032, USA.
authors: K
authors: K
authors: Aniol
authors: University of Glasgow, Glasgow G12 8QQ, Scotland, United Kingdom.
authors: J
authors: J
authors: Annand
authors: Temple University, Philadelphia, Pennsylvania 19122, USA.
authors: W
authors: W
authors: Armstrong
authors: Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA.
authors: J
authors: J
authors: Arrington
authors: College of William and Mary, Williamsburg, Virginia 23187, USA.
authors: T
authors: T
authors: Averett
authors: University of New Hampshire, Durham, New Hampshire 03824, USA.
authors: T
authors: T
authors: Badman
authors: University of Virginia, Charlottesville, Virginia 22904, USA.
authors: H
authors: H
authors: Baghdasaryan
authors: China Institute of Atomic Energy, Beijing, China.
authors: X
authors: X
authors: Bai
authors: Nuclear Research Center Negev, Beer-Sheva, Israel.
authors: A
authors: A
authors: Beck
authors: Nuclear Research Center Negev, Beer-Sheva, Israel.
authors: S
authors: S
authors: Beck
authors: Universita di Catania, Catania, Italy.
authors: V
authors: V
authors: Bellini
authors: Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA.
authors: F
authors: F
authors: Benmokhtar
authors: Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
authors: W
authors: W
authors: Bertozzi
authors: Longwood University, Farmville, Virginia 23909, USA.
authors: J
authors: J
authors: Bittner
authors: Florida International University, Miami, Florida 33199, USA.
authors: W
authors: W
authors: Boeglin
authors: Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
authors: A
authors: A
authors: Camsonne
authors: Hampton University, Hampton, Virginia 23668, USA.
authors: C
authors: C
authors: Chen
authors: Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
authors: J-P
authors: JP
authors: Chen
authors: University of Virginia, Charlottesville, Virginia 22904, USA.
authors: K
authors: K
authors: Chirapatpimol
authors: INFN, Sezione Sanità and Istituto Superiore di Sanità, 00161 Rome, Italy.
authors: E
authors: E
authors: Cisbani
authors: University of Virginia, Charlottesville, Virginia 22904, USA.
authors: M M
authors: MM
authors: Dalton
authors: Ohio University, Athens, Ohio 45701, USA.
authors: A
authors: A
authors: Daniel
authors: University of Virginia, Charlottesville, Virginia 22904, USA.
authors: D
authors: D
authors: Day
authors: Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA and University of Virginia, Charlottesville, Virginia 22904, USA.
authors: C W
authors: CW
authors: de Jager
authors: INFN, Sezione di Bari and University of Bari, I-70126 Bari, Italy.
authors: R
authors: R
authors: De Leo
authors: Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
authors: W
authors: W
authors: Deconinck
authors: CEA Saclay, F-91191 Gif-sur-Yvette, France.
authors: M
authors: M
authors: Defurne
authors: Temple University, Philadelphia, Pennsylvania 19122, USA.
authors: D
authors: D
authors: Flay
authors: University of Tennessee, Knoxville, Tennessee 37996, USA.
authors: N
authors: N
authors: Fomin
authors: Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA.
authors: M
authors: M
authors: Friend
authors: INFN, Sezione Sanità and Istituto Superiore di Sanità, 00161 Rome, Italy.
authors: S
authors: S
authors: Frullani
authors: Temple University, Philadelphia, Pennsylvania 19122, USA.
authors: E
authors: E
authors: Fuchey
authors: INFN, Sezione Sanità and Istituto Superiore di Sanità, 00161 Rome, Italy.
authors: F
authors: F
authors: Garibaldi
authors: Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
authors: D
authors: D
authors: Gaskell
authors: Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA and Rutgers, The State University of New Jersey, Piscataway, New Jersey 08855, USA.
authors: R
authors: R
authors: Gilman
authors: Kharkov Institute of Physics and Technology, Kharkov 61108, Ukraine.
authors: O
authors: O
authors: Glamazdin
authors: Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
authors: C
authors: C
authors: Gu
authors: Hampton University, Hampton, Virginia 23668, USA.
authors: P
authors: P
authors: Gueye
authors: University of Glasgow, Glasgow G12 8QQ, Scotland, United Kingdom.
authors: D
authors: D
authors: Hamilton
authors: Florida State University, Tallahassee, Florida 32306, USA.
authors: C
authors: C
authors: Hanretty
authors: Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
authors: J-O
authors: JO
authors: Hansen
authors: University of Virginia, Charlottesville, Virginia 22904, USA.
authors: M
authors: M
authors: Hashemi Shabestari
authors: Longwood University, Farmville, Virginia 23909, USA.
authors: T
authors: T
authors: Holmstrom
authors: Duke University, Durham, North Carolina 27708, USA.
authors: M
authors: M
authors: Huang
authors: California State University, Los Angeles, Los Angeles, California 90032, USA.
authors: S
authors: S
authors: Iqbal
authors: University of Virginia, Charlottesville, Virginia 22904, USA.
authors: G
authors: G
authors: Jin
authors: University of Texas, Houston, Texas 77030, USA.
authors: N
authors: N
authors: Kalantarians
authors: Seoul National University, Seoul, Korea.
authors: H
authors: H
authors: Kang
authors: Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
authors: M
authors: M
authors: Khandaker
authors: Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
authors: J
authors: J
authors: LeRose
authors: Indiana University, Bloomington, Indiana 47405, USA.
authors: J
authors: J
authors: Leckey
authors: University of Virginia, Charlottesville, Virginia 22904, USA.
authors: R
authors: R
authors: Lindgren
authors: University of New Hampshire, Durham, New Hampshire 03824, USA.
authors: E
authors: E
authors: Long
authors: Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, USA.
authors: J
authors: J
authors: Mammei
authors: California State University, Los Angeles, Los Angeles, California 90032, USA.
authors: D J
authors: DJ
authors: Margaziotis
authors: Florida International University, Miami, Florida 33199, USA.
authors: P
authors: P
authors: Markowitz
authors: Université Blaise Pascal/IN2P3, F-63177 Aubière, France.
authors: A
authors: A
authors: Marti Jimenez-Arguello
authors: Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
authors: D
authors: D
authors: Meekins
authors: Temple University, Philadelphia, Pennsylvania 19122, USA.
authors: Z
authors: Z
authors: Meziani
authors: Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
authors: R
authors: R
authors: Michaels
authors: Jozef Stefan Institute, Ljubljana, Slovenia.
authors: M
authors: M
authors: Mihovilovic
authors: Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA and Hampton University, Hampton, Virginia 23668, USA.
authors: P
authors: P
authors: Monaghan
authors: Université Blaise Pascal/IN2P3, F-63177 Aubière, France.
authors: C
authors: C
authors: Munoz Camacho
authors: University of Virginia, Charlottesville, Virginia 22904, USA.
authors: B
authors: B
authors: Norum
authors: Mississippi State University, Mississippi State, Mississippi 39762, USA.
authors: Nuruzzaman
authors: Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
authors: K
authors: K
authors: Pan
authors: University of New Hampshire, Durham, New Hampshire 03824, USA.
authors: S
authors: S
authors: Phillips
authors: Tel Aviv University, Tel Aviv 69978, Israel and The University of Texas at Austin, Austin, Texas 78712, USA.
authors: I
authors: I
authors: Pomerantz
authors: Temple University, Philadelphia, Pennsylvania 19122, USA.
authors: M
authors: M
authors: Posik
authors: Norfolk State University, Norfolk, Virginia 23504, USA.
authors: V
authors: V
authors: Punjabi
authors: Duke University, Durham, North Carolina 27708, USA.
authors: X
authors: X
authors: Qian
authors: Duke University, Durham, North Carolina 27708, USA.
authors: Y
authors: Y
authors: Qiang
authors: Lanzhou University, Lanzhou, China.
authors: X
authors: X
authors: Qiu
authors: Syracuse University, Syracuse, New York 13244, USA.
authors: A
authors: A
authors: Rakhman
authors: Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA.
authors: P E
authors: PE
authors: Reimer
authors: University of Virginia, Charlottesville, Virginia 22904, USA and University of Massachusetts, Amherst, Massachusetts 01006, USA.
authors: S
authors: S
authors: Riordan
authors: Racah Institute of Physics, Hebrew University of Jerusalem, Jerusalem, Israel.
authors: G
authors: G
authors: Ron
authors: Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
authors: O
authors: O
authors: Rondon-Aramayo
authors: Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
authors: A
authors: A
authors: Saha
authors: Rutgers, The State University of New Jersey, Piscataway, New Jersey 08855, USA.
authors: E
authors: E
authors: Schulte
authors: Kent State University, Kent, Ohio 44242, USA.
authors: L
authors: L
authors: Selvy
authors: Yerevan Physics Institute, Yerevan 375036, Armenia.
authors: A
authors: A
authors: Shahinyan
authors: University of Ljubljana, Ljubljana, Slovenia.
authors: S
authors: S
authors: Sirca
authors: University of Glasgow, Glasgow G12 8QQ, Scotland, United Kingdom.
authors: J
authors: J
authors: Sjoegren
authors: University of New Hampshire, Durham, New Hampshire 03824, USA.
authors: K
authors: K
authors: Slifer
authors: Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
authors: P
authors: P
authors: Solvignon
authors: Temple University, Philadelphia, Pennsylvania 19122, USA.
authors: N
authors: N
authors: Sparveris
authors: University of Virginia, Charlottesville, Virginia 22904, USA.
authors: R
authors: R
authors: Subedi
authors: Northern Michigan University, Marquette, Michigan 49855, USA.
authors: W
authors: W
authors: Tireman
authors: University of Virginia, Charlottesville, Virginia 22904, USA.
authors: D
authors: D
authors: Wang
authors: Old Dominion University, Norfolk, Virginia 23529, USA.
authors: L B
authors: LB
authors: Weinstein
authors: Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
authors: B
authors: B
authors: Wojtsekhowski
authors: University of Science and Technology, Hefei, China.
authors: W
authors: W
authors: Yan
authors: Tel Aviv University, Tel Aviv 69978, Israel.
authors: I
authors: I
authors: Yaron
authors: University of Virginia, Charlottesville, Virginia 22904, USA.
authors: Z
authors: Z
authors: Ye
authors: Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
authors: X
authors: X
authors: Zhan
authors: Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
authors: J
authors: J
authors: Zhang
authors: Rutgers, The State University of New Jersey, Piscataway, New Jersey 08855, USA.
authors: Y
authors: Y
authors: Zhang
authors: College of William and Mary, Williamsburg, Virginia 23187, USA.
authors: B
authors: B
authors: Zhao
authors: University of Virginia, Charlottesville, Virginia 22904, USA.
authors: Z
authors: Z
authors: Zhao
authors: University of Virginia, Charlottesville, Virginia 22904, USA.
authors: X
authors: X
authors: Zheng
authors: University of Science and Technology, Hefei, China.
authors: P
authors: P
authors: Zhu
authors: University of New Hampshire, Durham, New Hampshire 03824, USA.
authors: R
authors: R
authors: Zielinski