publication . Article . Other literature type . Preprint . 2017

Final COMPASS results on the deuteron spin-dependent structure function $g_1^{\rm d}$ and the Bjorken sum rule

W. Dünnweber; C. Adolph; Miroslav Sulc; A. Maggiora; P. Schiavon; I. Konorov; I. Konorov; B. Marianski; Y. P. Kulinich; A. Efremov; ...
Open Access English
  • Published: 01 Jun 2017
  • Publisher: HAL CCSD
Abstract
Final results are presented from the inclusive measurement of deep-inelastic polarised-muon scattering on longitudinally polarised deuterons using a $^6$LiD target. The data were taken at $160~{\rm GeV}$ beam energy and the results are shown for the kinematic range $1~({\rm GeV}/c)^2 < Q^2 < 100~({\rm GeV}/c)^2$ in photon virtuality, $0.004<x<0.7$ in the Bjorken scaling variable and $W > 4~{\rm GeV}/c^2$ in the mass of the hadronic final state. The deuteron double-spin asymmetry $A_1^{\rm d}$ and the deuteron longitudinal-spin structure function $g_1^{\rm d}$ are presented in bins of $x$ and $Q^2$. Towards lowest accessible values of $x$, $g_1^{\rm d}$ decreases...
Subjects
arXiv: High Energy Physics::ExperimentNuclear ExperimentHigh Energy Physics::Phenomenology
free text keywords: experimental results, polarization: asymmetry, momentum transfer dependence, x-dependence, kinematics, strong coupling, renormalization, muon deuteron: deep inelastic scattering, cross section: ratio, statistical, coupling constant, quantum chromodynamics: perturbation theory, CERN SPS, quark: helicity, nucleon: spin, beam: energy, charge: axial, final state: hadronic, p: spin, deuteron: structure function, scaling: Bjorken, Deep inelastic scattering, muon: polarized beam, sum rule: Bjorken, polarized target, Parton helicity distributions, structure function: spin, Structure function, Spin, COMPASS, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Nuclear and High Energy Physics, COMPASS; Deep inelastic scattering; Parton helicity distributions; Spin; Structure function; Nuclear and High Energy Physics, hep-ex, Particle Physics - Experiment, QC1-999, High Energy Physics - Experiment, Physical Sciences, Fysik, [ PHYS.HEXP ] Physics [physics]/High Energy Physics - Experiment [hep-ex], Photon, Physics, Scattering, Quantum chromodynamics, Particle physics, Sum rule in quantum mechanics, Spin-½, Nuclear physics
Funded by
EC| HADRONPHYSICS3
Project
HADRONPHYSICS3
Study of Strongly Interacting Matter
  • Funder: European Commission (EC)
  • Project Code: 283286
  • Funding stream: FP7 | SP4 | INFRA
28 references, page 1 of 2

[1] EMC, J. Ashman, et al., Phys. Lett. B 206 (1988) 364, Nucl. Phys. B 328 (1989) 1.

[2] SMC, B. Adeva, et al., Phys. Rev. D 58 (1998) 112001.

[3] C. Alexandrou, Parton distribution functions from Lattice QCD, in: Proceedings of Light Cone 2015 Conference, Frascati, Italy, 2015, Few-Body Syst. 57 (2016) 621.

[4] C.A. Aidala, S.D. Bass, D. Hasch, G.K. Mallot, Rev. Mod. Phys. 85 (2013) 655.

[5] J. Blumlein, A. Vogt, Phys. Lett. B 370 (1996) 149, Phys. Lett. B 386 (1996) 350.

[6] J. Bartels, B.I. Ermolaev, M.G. Ryskin, Z. Phys. C 70 (1996) 273, Z. Phys. C 72 (1996) 627.

[7] COMPASS Collaboration, V.Yu. Alexakhin, et al., Phys. Lett. B 647 (2007) 8.

[8] COMPASS Collaboration, M.G. Alekseev, et al., Phys. Lett. B 690 (2010) 466.

[9] COMPASS Collaboration, C. Adolph, et al., Phys. Lett. B 753 (2016) 18.

[10] M. Wilfert, PhD thesis, Mainz University, 2017.

[11] COMPASS Collaboration, V.Yu. Alexakhin, et al., Phys. Lett. B 647 (2007) 330.

[12] COMPASS Collaboration, P. Abbon, et al., Nucl. Instrum. Methods A 577 (2007) 455.

[13] P. Hoodbhoy, R.L. Jaffe, A.V. Manohar, Nucl. Phys. B 312 (1989) 571.

[14] HERMES Collaboration, A. Airapetian, et al., Phys. Rev. Lett. 95 (2005) 242001.

[15] COMPASS Collaboration, E.S. Ageev, et al., Nucl. Phys. B 765 (2007) 31.

28 references, page 1 of 2
Abstract
Final results are presented from the inclusive measurement of deep-inelastic polarised-muon scattering on longitudinally polarised deuterons using a $^6$LiD target. The data were taken at $160~{\rm GeV}$ beam energy and the results are shown for the kinematic range $1~({\rm GeV}/c)^2 < Q^2 < 100~({\rm GeV}/c)^2$ in photon virtuality, $0.004<x<0.7$ in the Bjorken scaling variable and $W > 4~{\rm GeV}/c^2$ in the mass of the hadronic final state. The deuteron double-spin asymmetry $A_1^{\rm d}$ and the deuteron longitudinal-spin structure function $g_1^{\rm d}$ are presented in bins of $x$ and $Q^2$. Towards lowest accessible values of $x$, $g_1^{\rm d}$ decreases...
Subjects
arXiv: High Energy Physics::ExperimentNuclear ExperimentHigh Energy Physics::Phenomenology
free text keywords: experimental results, polarization: asymmetry, momentum transfer dependence, x-dependence, kinematics, strong coupling, renormalization, muon deuteron: deep inelastic scattering, cross section: ratio, statistical, coupling constant, quantum chromodynamics: perturbation theory, CERN SPS, quark: helicity, nucleon: spin, beam: energy, charge: axial, final state: hadronic, p: spin, deuteron: structure function, scaling: Bjorken, Deep inelastic scattering, muon: polarized beam, sum rule: Bjorken, polarized target, Parton helicity distributions, structure function: spin, Structure function, Spin, COMPASS, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Nuclear and High Energy Physics, COMPASS; Deep inelastic scattering; Parton helicity distributions; Spin; Structure function; Nuclear and High Energy Physics, hep-ex, Particle Physics - Experiment, QC1-999, High Energy Physics - Experiment, Physical Sciences, Fysik, [ PHYS.HEXP ] Physics [physics]/High Energy Physics - Experiment [hep-ex], Photon, Physics, Scattering, Quantum chromodynamics, Particle physics, Sum rule in quantum mechanics, Spin-½, Nuclear physics
Funded by
EC| HADRONPHYSICS3
Project
HADRONPHYSICS3
Study of Strongly Interacting Matter
  • Funder: European Commission (EC)
  • Project Code: 283286
  • Funding stream: FP7 | SP4 | INFRA
28 references, page 1 of 2

[1] EMC, J. Ashman, et al., Phys. Lett. B 206 (1988) 364, Nucl. Phys. B 328 (1989) 1.

[2] SMC, B. Adeva, et al., Phys. Rev. D 58 (1998) 112001.

[3] C. Alexandrou, Parton distribution functions from Lattice QCD, in: Proceedings of Light Cone 2015 Conference, Frascati, Italy, 2015, Few-Body Syst. 57 (2016) 621.

[4] C.A. Aidala, S.D. Bass, D. Hasch, G.K. Mallot, Rev. Mod. Phys. 85 (2013) 655.

[5] J. Blumlein, A. Vogt, Phys. Lett. B 370 (1996) 149, Phys. Lett. B 386 (1996) 350.

[6] J. Bartels, B.I. Ermolaev, M.G. Ryskin, Z. Phys. C 70 (1996) 273, Z. Phys. C 72 (1996) 627.

[7] COMPASS Collaboration, V.Yu. Alexakhin, et al., Phys. Lett. B 647 (2007) 8.

[8] COMPASS Collaboration, M.G. Alekseev, et al., Phys. Lett. B 690 (2010) 466.

[9] COMPASS Collaboration, C. Adolph, et al., Phys. Lett. B 753 (2016) 18.

[10] M. Wilfert, PhD thesis, Mainz University, 2017.

[11] COMPASS Collaboration, V.Yu. Alexakhin, et al., Phys. Lett. B 647 (2007) 330.

[12] COMPASS Collaboration, P. Abbon, et al., Nucl. Instrum. Methods A 577 (2007) 455.

[13] P. Hoodbhoy, R.L. Jaffe, A.V. Manohar, Nucl. Phys. B 312 (1989) 571.

[14] HERMES Collaboration, A. Airapetian, et al., Phys. Rev. Lett. 95 (2005) 242001.

[15] COMPASS Collaboration, E.S. Ageev, et al., Nucl. Phys. B 765 (2007) 31.

28 references, page 1 of 2
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