Measurement of the Q2 Dependence of the Deuteron Spin Structure Function g1 and its Moments at Low Q2 with CLAS

CLAS Collaboration

doi:10.1103/PhysRevLett.120.062501

Measurement of the Q2 Dependence of the Deuteron Spin Structure Function g1 and its Moments at Low Q2 with CLAS

CLAS Collaboration

Old Dominion University
Thomas Jefferson National Accelerator Facility
Mississippi State University
University of Virginia
Seoul National University
National Institute for Nuclear Physics
University of New Hampshire
Florida International University
Florida State University
Université Paris-Saclay
Alikhanov Institute for Theoretical and Experimental Physics
Fairfield University
College of William and Mary
George Washington University
University of Connecticut
Ohio University
University of Glasgow
Idaho State University
University of Rome Tor Vergata
A. Alikhanian Yerevan Institute of Physics
University of South Carolina
Lomonosov Moscow State University
CNRS/IN2P3
Universidad Técnica Federico Santa Maria

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

30 Scopus citations

Abstract

We measured the g1 spin structure function of the deuteron at low Q2, where QCD can be approximated with chiral perturbation theory (χPT). The data cover the resonance region, up to an invariant mass of W≈1.9 GeV. The generalized Gerasimov-Drell-Hearn sum, the moment Γ1d and the spin polarizability γ0d are precisely determined down to a minimum Q2 of 0.02 GeV2 for the first time, about 2.5 times lower than that of previous data. We compare them to several χPT calculations and models. These results are the first in a program of benchmark measurements of polarization observables in the χPT domain.

Original language	English
Article number	062501
Journal	Physical Review Letters
Volume	120
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevLett.120.062501
State	Published - 8 Feb 2018

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10.1103/PhysRevLett.120.062501

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@article{6163f1f8be0544e7ac4c8a4bdc4243f0,

title = "Measurement of the Q2 Dependence of the Deuteron Spin Structure Function g1 and its Moments at Low Q2 with CLAS",

abstract = "We measured the g1 spin structure function of the deuteron at low Q2, where QCD can be approximated with chiral perturbation theory (χPT). The data cover the resonance region, up to an invariant mass of W≈1.9 GeV. The generalized Gerasimov-Drell-Hearn sum, the moment Γ1d and the spin polarizability γ0d are precisely determined down to a minimum Q2 of 0.02 GeV2 for the first time, about 2.5 times lower than that of previous data. We compare them to several χPT calculations and models. These results are the first in a program of benchmark measurements of polarization observables in the χPT domain.",

author = "\{CLAS Collaboration\} and Adhikari, \{K. P.\} and A. Deur and \{El Fassi\}, L. and H. Kang and Kuhn, \{S. E.\} and M. Ripani and K. Slifer and X. Zheng and S. Adhikari and Z. Akbar and Amaryan, \{M. J.\} and H. Avakian and J. Ball and I. Balossino and L. Barion and M. Battaglieri and I. Bedlinskiy and Biselli, \{A. S.\} and P. Bosted and Briscoe, \{W. J.\} and J. Brock and S. B{\"u}ltmann and Burkert, \{V. D.\} and \{Thanh Cao\}, F. and C. Carlin and Carman, \{D. S.\} and A. Celentano and G. Charles and Chen, \{J. P.\} and T. Chetry and S. Choi and G. Ciullo and L. Clark and Cole, \{P. L.\} and M. Contalbrigo and V. Crede and A. D'Angelo and N. Dashyan and \{De Vita\}, R. and \{De Sanctis\}, E. and M. Defurne and C. Djalali and Dodge, \{G. E.\} and V. Drozdov and R. Dupre and H. Egiyan and \{El Alaoui\}, A. and L. Elouadrhiri and P. Eugenio and Jo, \{H. S.\}",

note = "Publisher Copyright: {\textcopyright} 2018 American Physical Society.",

year = "2018",

month = feb,

day = "8",

doi = "10.1103/PhysRevLett.120.062501",

language = "English",

volume = "120",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "6",

}

TY - JOUR

T1 - Measurement of the Q2 Dependence of the Deuteron Spin Structure Function g1 and its Moments at Low Q2 with CLAS

AU - CLAS Collaboration

AU - Adhikari, K. P.

AU - Deur, A.

AU - El Fassi, L.

AU - Kang, H.

AU - Kuhn, S. E.

AU - Ripani, M.

AU - Slifer, K.

AU - Zheng, X.

AU - Adhikari, S.

AU - Akbar, Z.

AU - Amaryan, M. J.

AU - Avakian, H.

AU - Ball, J.

AU - Balossino, I.

AU - Barion, L.

AU - Battaglieri, M.

AU - Bedlinskiy, I.

AU - Biselli, A. S.

AU - Bosted, P.

AU - Briscoe, W. J.

AU - Brock, J.

AU - Bültmann, S.

AU - Burkert, V. D.

AU - Thanh Cao, F.

AU - Carlin, C.

AU - Carman, D. S.

AU - Celentano, A.

AU - Charles, G.

AU - Chen, J. P.

AU - Chetry, T.

AU - Choi, S.

AU - Ciullo, G.

AU - Clark, L.

AU - Cole, P. L.

AU - Contalbrigo, M.

AU - Crede, V.

AU - D'Angelo, A.

AU - Dashyan, N.

AU - De Vita, R.

AU - De Sanctis, E.

AU - Defurne, M.

AU - Djalali, C.

AU - Dodge, G. E.

AU - Drozdov, V.

AU - Dupre, R.

AU - Egiyan, H.

AU - El Alaoui, A.

AU - Elouadrhiri, L.

AU - Eugenio, P.

AU - Jo, H. S.

PY - 2018/2/8

Y1 - 2018/2/8

N2 - We measured the g1 spin structure function of the deuteron at low Q2, where QCD can be approximated with chiral perturbation theory (χPT). The data cover the resonance region, up to an invariant mass of W≈1.9 GeV. The generalized Gerasimov-Drell-Hearn sum, the moment Γ1d and the spin polarizability γ0d are precisely determined down to a minimum Q2 of 0.02 GeV2 for the first time, about 2.5 times lower than that of previous data. We compare them to several χPT calculations and models. These results are the first in a program of benchmark measurements of polarization observables in the χPT domain.

AB - We measured the g1 spin structure function of the deuteron at low Q2, where QCD can be approximated with chiral perturbation theory (χPT). The data cover the resonance region, up to an invariant mass of W≈1.9 GeV. The generalized Gerasimov-Drell-Hearn sum, the moment Γ1d and the spin polarizability γ0d are precisely determined down to a minimum Q2 of 0.02 GeV2 for the first time, about 2.5 times lower than that of previous data. We compare them to several χPT calculations and models. These results are the first in a program of benchmark measurements of polarization observables in the χPT domain.

UR - https://www.scopus.com/pages/publications/85041807453

U2 - 10.1103/PhysRevLett.120.062501

DO - 10.1103/PhysRevLett.120.062501

M3 - Article

C2 - 29481214

AN - SCOPUS:85041807453

SN - 0031-9007

VL - 120

JO - Physical Review Letters

JF - Physical Review Letters

IS - 6

M1 - 062501

ER -

Measurement of the Q2 Dependence of the Deuteron Spin Structure Function g1 and its Moments at Low Q2 with CLAS

Abstract

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