Neutron spin structure from polarized deuteron DIS with proton tagging

doi:10.1016/j.physletb.2019.135035

Title: Neutron spin structure from polarized deuteron DIS with proton tagging

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Abstract

Polarized electron-deuteron deep-inelastic scattering (DIS) with detection of the spectator proton ("tagged DIS") enables measurements of neutron spin structure with maximal control of nuclear effects. We calculate the longitudinal spin asymmetries in polarized tagged DIS using methods of light-front nuclear structure and study their dependence on the measured proton momentum. Asymmetries can be formed with all three deuteron spin states (± 1, 0) or the two maximum-spin states only (± 1, involving tensor polarization). The proton momentum dependence can be used to select pure S-wave configurations in the deuteron and eliminate D-wave depolarization (transverse momenta p_pT ≲ 100 MeV). Free neutron spin structure can be extracted model-independently through pole extrapolation of the tagged asymmetries. Such measurements could be performed at a future electron-ion collider (EIC) with polarized deuteron beams and forward proton detectors.

Authors:: Cosyn, W.; Weiss, C.

Publication Date:: 2019-12-01

Research Org.:: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Nuclear Physics (NP)

OSTI Identifier:: 1571529

Alternate Identifier(s):: OSTI ID: 1573908

Report Number(s):: JLAB-THY-19-2967; DOE/OR/23177-4714
Journal ID: ISSN 0370-2693; S0370269319307579; 135035; PII: S0370269319307579

Grant/Contract Number:: AC05-06OR23177

Resource Type:: Published Article

Journal Name:: Physics Letters B

Additional Journal Information:: Journal Name: Physics Letters B Journal Volume: 799 Journal Issue: C; Journal ID: ISSN 0370-2693

Publisher:: Elsevier

Country of Publication:: Netherlands

Language:: English

Subject:: 74 ATOMIC AND MOLECULAR PHYSICS; Polarized deep-inelastic scattering; Neutron; Nuclear fragmentation; Electron-ion collider; Light-front quantization

Citation Formats


                    Cosyn, W., and Weiss, C. Neutron spin structure from polarized deuteron DIS with proton tagging.  Netherlands: N. p., 2019. 
        Web.  doi:10.1016/j.physletb.2019.135035.

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                    Cosyn, W., & Weiss, C. Neutron spin structure from polarized deuteron DIS with proton tagging.  Netherlands.  doi:10.1016/j.physletb.2019.135035.

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                    Cosyn, W., and Weiss, C. Sun .  
        "Neutron spin structure from polarized deuteron DIS with proton tagging".  Netherlands.  doi:10.1016/j.physletb.2019.135035.

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@article{osti_1571529,

  title        = {Neutron spin structure from polarized deuteron DIS with proton tagging},

  author       = {Cosyn, W. and Weiss, C.},

  abstractNote = {Polarized electron-deuteron deep-inelastic scattering (DIS) with detection of the spectator proton ("tagged DIS") enables measurements of neutron spin structure with maximal control of nuclear effects. We calculate the longitudinal spin asymmetries in polarized tagged DIS using methods of light-front nuclear structure and study their dependence on the measured proton momentum. Asymmetries can be formed with all three deuteron spin states (± 1, 0) or the two maximum-spin states only (± 1, involving tensor polarization). The proton momentum dependence can be used to select pure S-wave configurations in the deuteron and eliminate D-wave depolarization (transverse momenta ppT ≲ 100 MeV). Free neutron spin structure can be extracted model-independently through pole extrapolation of the tagged asymmetries. Such measurements could be performed at a future electron-ion collider (EIC) with polarized deuteron beams and forward proton detectors.},

  doi          = {10.1016/j.physletb.2019.135035},

  journal      = {Physics Letters B},

  number       = C,

  volume       = 799,

  place        = {Netherlands},

  year         = {2019},

  month        = {12}

}

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