Measurement of nuclear transparency ratios for protons and neutrons

The CLAS Collaboration

doi:10.1016/j.physletb.2019.07.039

Measurement of nuclear transparency ratios for protons and neutrons

The CLAS Collaboration

Tel Aviv University
Massachusetts Institute of Technology
Old Dominion University
Universidad Técnica Federico Santa Maria
Florida International University
George Washington University
Thomas Jefferson National Accelerator Facility
College of William and Mary
National Institute for Nuclear Physics
Alikhanov Institute for Theoretical and Experimental Physics
Carnegie Mellon University
Fairfield University
University of Connecticut
CNRS/IN2P3
Ohio University
University of Ferrara
Catholic University of America
Idaho State University
Lamar University
Florida State University
University of Rome Tor Vergata
A. Alikhanian Yerevan Institute of Physics
University of South Carolina
Temple University
Mississippi State University
University of Richmond

Research output: Contribution to journal › Article › peer-review

16 Scopus citations

Abstract

This paper presents, for the first time, measurements of neutron transparency ratios for nuclei relative to C measured using the (e,e^′n) reaction, spanning measured neutron momenta of 1.4 to 2.4 GeV/c. The transparency ratios were extracted in two kinematical regions, corresponding to knockout of mean-field nucleons and to the breakup of Short-Range Correlated nucleon pairs. The extracted neutron transparency ratios are consistent with each other for the two measured kinematical regions and agree with the proton transparencies extracted from new and previous (e,e^′p) measurements, including those from neutron-rich nuclei such as lead. The data also agree with and confirm the Glauber approximation that is commonly used to interpret experimental data. The nuclear-mass-dependence of the extracted transparencies scales as A^α with α=−0.289±0.007, which is consistent with nuclear-surface dominance of the reactions.

Original language	English
Article number	134792
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	797
DOIs	https://doi.org/10.1016/j.physletb.2019.07.039
State	Published - 10 Oct 2019

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10.1016/j.physletb.2019.07.039

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@article{125901bb5afd42da893391db5e52d261,

title = "Measurement of nuclear transparency ratios for protons and neutrons",

abstract = "This paper presents, for the first time, measurements of neutron transparency ratios for nuclei relative to C measured using the (e,e′n) reaction, spanning measured neutron momenta of 1.4 to 2.4 GeV/c. The transparency ratios were extracted in two kinematical regions, corresponding to knockout of mean-field nucleons and to the breakup of Short-Range Correlated nucleon pairs. The extracted neutron transparency ratios are consistent with each other for the two measured kinematical regions and agree with the proton transparencies extracted from new and previous (e,e′p) measurements, including those from neutron-rich nuclei such as lead. The data also agree with and confirm the Glauber approximation that is commonly used to interpret experimental data. The nuclear-mass-dependence of the extracted transparencies scales as Aα with α=−0.289±0.007, which is consistent with nuclear-surface dominance of the reactions.",

author = "\{The CLAS Collaboration\} and M. Duer and O. Hen and E. Piasetzky and Weinstein, \{L. B.\} and A. Schmidt and I. Korover and Cohen, \{E. O.\} and H. Hakobyan and S. Adhikari and G. Angelini and H. Avakian and \{Ayerbe Gayoso\}, C. and L. Barion and M. Battaglieri and A. Beck and I. Bedlinskiy and Biselli, \{A. S.\} and S. Boiarinov and Briscoe, \{W. J.\} and W. Brooks and Burkert, \{V. D.\} and F. Cao and Carman, \{D. S.\} and A. Celentano and P. Chatagnon and T. Chetry and G. Ciullo and Cole, \{P. L.\} and M. Contalbrigo and O. Cortes and V. Crede and \{Cruz Torres\}, R. and A. D'Angelo and N. Dashyan and \{De Vita\}, R. and \{De Sanctis\}, E. and A. Deur and S. Diehl and C. Djalali and R. Dupre and B. Duran and H. Egiyan and M. Ehrhart and \{El Alaoui\}, A. and \{El Fassi\}, L. and P. Eugenio and A. Filippi and Forest, \{T. A.\} and Gilfoyle, \{G. P.\} and Jo, \{H. S.\}",

note = "Publisher Copyright: {\textcopyright} 2019 The Author",

year = "2019",

month = oct,

day = "10",

doi = "10.1016/j.physletb.2019.07.039",

language = "English",

volume = "797",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

publisher = "Elsevier B.V.",

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TY - JOUR

T1 - Measurement of nuclear transparency ratios for protons and neutrons

AU - The CLAS Collaboration

AU - Duer, M.

AU - Hen, O.

AU - Piasetzky, E.

AU - Weinstein, L. B.

AU - Schmidt, A.

AU - Korover, I.

AU - Cohen, E. O.

AU - Hakobyan, H.

AU - Adhikari, S.

AU - Angelini, G.

AU - Avakian, H.

AU - Ayerbe Gayoso, C.

AU - Barion, L.

AU - Battaglieri, M.

AU - Beck, A.

AU - Bedlinskiy, I.

AU - Biselli, A. S.

AU - Boiarinov, S.

AU - Briscoe, W. J.

AU - Brooks, W.

AU - Burkert, V. D.

AU - Cao, F.

AU - Carman, D. S.

AU - Celentano, A.

AU - Chatagnon, P.

AU - Chetry, T.

AU - Ciullo, G.

AU - Cole, P. L.

AU - Contalbrigo, M.

AU - Cortes, O.

AU - Crede, V.

AU - Cruz Torres, R.

AU - D'Angelo, A.

AU - Dashyan, N.

AU - De Vita, R.

AU - De Sanctis, E.

AU - Deur, A.

AU - Diehl, S.

AU - Djalali, C.

AU - Dupre, R.

AU - Duran, B.

AU - Egiyan, H.

AU - Ehrhart, M.

AU - El Alaoui, A.

AU - El Fassi, L.

AU - Eugenio, P.

AU - Filippi, A.

AU - Forest, T. A.

AU - Gilfoyle, G. P.

AU - Jo, H. S.

PY - 2019/10/10

Y1 - 2019/10/10

N2 - This paper presents, for the first time, measurements of neutron transparency ratios for nuclei relative to C measured using the (e,e′n) reaction, spanning measured neutron momenta of 1.4 to 2.4 GeV/c. The transparency ratios were extracted in two kinematical regions, corresponding to knockout of mean-field nucleons and to the breakup of Short-Range Correlated nucleon pairs. The extracted neutron transparency ratios are consistent with each other for the two measured kinematical regions and agree with the proton transparencies extracted from new and previous (e,e′p) measurements, including those from neutron-rich nuclei such as lead. The data also agree with and confirm the Glauber approximation that is commonly used to interpret experimental data. The nuclear-mass-dependence of the extracted transparencies scales as Aα with α=−0.289±0.007, which is consistent with nuclear-surface dominance of the reactions.

AB - This paper presents, for the first time, measurements of neutron transparency ratios for nuclei relative to C measured using the (e,e′n) reaction, spanning measured neutron momenta of 1.4 to 2.4 GeV/c. The transparency ratios were extracted in two kinematical regions, corresponding to knockout of mean-field nucleons and to the breakup of Short-Range Correlated nucleon pairs. The extracted neutron transparency ratios are consistent with each other for the two measured kinematical regions and agree with the proton transparencies extracted from new and previous (e,e′p) measurements, including those from neutron-rich nuclei such as lead. The data also agree with and confirm the Glauber approximation that is commonly used to interpret experimental data. The nuclear-mass-dependence of the extracted transparencies scales as Aα with α=−0.289±0.007, which is consistent with nuclear-surface dominance of the reactions.

UR - https://www.scopus.com/pages/publications/85069846244

U2 - 10.1016/j.physletb.2019.07.039

DO - 10.1016/j.physletb.2019.07.039

M3 - Article

AN - SCOPUS:85069846244

SN - 0370-2693

VL - 797

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

M1 - 134792

ER -

Measurement of nuclear transparency ratios for protons and neutrons

Abstract

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