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Tensor-polarized structure function b1 in the standard convolution description of the deuteron

Wim Cosyn UGent, Yu-Bing Dong, S Kumano and M Sargsian (2017) PHYSICAL REVIEW D. 95(7).
abstract
Tensor-polarized structure functions of a spin-1 hadron are additional observables, which do not exist for the spin-1/2 nucleon. They could probe novel aspects of the internal hadron structure. Twist-2 tensor-polarized structure functions are b1 and b2, and they are related by the Callan-Gross-like relation in the Bjorken scaling limit. In this work, we theoretically calculate b1 in the standard convolution description for the deuteron. Two different theoretical models, a basic convolution description and a virtual nucleon approximation, are used for calculating b1, and their results are compared with the HERMES measurement. We found large differences between our theoretical results and the data. Although there is still room to improve by considering higher-twist effects and in the experimental extraction of b1 from the spin asymmetry Azz, there is a possibility that the large differences require physics beyond the standard deuteron model for their interpretation. Future b1 studies could shed light on a new field of hadron physics. In particular, detailed experimental studies of b1 will start soon at the Thomas Jefferson National Accelerator Facility. In addition, there are possibilities to investigate tensor-polarized parton distribution functions and b1 at Fermi National Accelerator Laboratory and a future electron-ion collider. Therefore, further theoretical studies are needed for understanding the tensor structure of the spin-1 deuteron, including a new mechanism to explain the large differences between the current data and our theoretical results.
Please use this url to cite or link to this publication:
author
organization
alternative title
Tensor-polarized structure function b(1) in the standard convolution description of the deuteron
year
type
journalArticle (original)
publication status
published
subject
keyword
DEEP-INELASTIC-SCATTERING, GENERALIZED PARTON DISTRIBUTIONS, SPIN-ONE HADRONS, ELECTRON-SCATTERING, FLAVOR ASYMMETRY, NUCLEON, MESONS, QUARKS, SEA, QCD
journal title
PHYSICAL REVIEW D
Phys. Rev. D
volume
95
issue
7
article number
074036
pages
13 pages
Web of Science type
Article
Web of Science id
000400142000005
ISSN
2470-0010
DOI
10.1103/physrevd.95.074036
language
English
UGent publication?
yes
classification
A1
copyright statement
I have transferred the copyright for this publication to the publisher
id
8526054
handle
http://hdl.handle.net/1854/LU-8526054
date created
2017-06-30 17:37:02
date last changed
2017-07-05 13:47:43
@article{8526054,
  abstract     = {Tensor-polarized structure functions of a spin-1 hadron are additional observables, which do not exist for the spin-1/2 nucleon. They could probe novel aspects of the internal hadron structure. Twist-2 tensor-polarized structure functions are b1 and b2, and they are related by the Callan-Gross-like relation in the Bjorken scaling limit. In this work, we theoretically calculate b1 in the standard convolution description for the deuteron. Two different theoretical models, a basic convolution description and a virtual nucleon approximation, are used for calculating b1, and their results are compared with the HERMES measurement. We found large differences between our theoretical results and the data. Although there is still room to improve by considering higher-twist effects and in the experimental extraction of b1 from the spin asymmetry Azz, there is a possibility that the large differences require physics beyond the standard deuteron model for their interpretation. Future b1 studies could shed light on a new field of hadron physics. In particular, detailed experimental studies of b1 will start soon at the Thomas Jefferson National Accelerator Facility. In addition, there are possibilities to investigate tensor-polarized parton distribution functions and b1 at Fermi National Accelerator Laboratory and a future electron-ion collider. Therefore, further theoretical studies are needed for understanding the tensor structure of the spin-1 deuteron, including a new mechanism to explain the large differences between the current data and our theoretical results.},
  articleno    = {074036},
  author       = {Cosyn, Wim and Dong, Yu-Bing and Kumano, S and Sargsian, M},
  issn         = {2470-0010},
  journal      = {PHYSICAL REVIEW D},
  keyword      = {DEEP-INELASTIC-SCATTERING,GENERALIZED PARTON DISTRIBUTIONS,SPIN-ONE HADRONS,ELECTRON-SCATTERING,FLAVOR ASYMMETRY,NUCLEON,MESONS,QUARKS,SEA,QCD},
  language     = {eng},
  number       = {7},
  pages        = {13},
  title        = {Tensor-polarized structure function b1 in the standard convolution description of the deuteron},
  url          = {http://dx.doi.org/10.1103/physrevd.95.074036},
  volume       = {95},
  year         = {2017},
}

Chicago
Cosyn, Wim, Yu-Bing Dong, S Kumano, and M Sargsian. 2017. “Tensor-polarized Structure Function B1 in the Standard Convolution Description of the Deuteron.” Physical Review D 95 (7).
APA
Cosyn, W., Dong, Y.-B., Kumano, S., & Sargsian, M. (2017). Tensor-polarized structure function b1 in the standard convolution description of the deuteron. PHYSICAL REVIEW D, 95(7).
Vancouver
1.
Cosyn W, Dong Y-B, Kumano S, Sargsian M. Tensor-polarized structure function b1 in the standard convolution description of the deuteron. PHYSICAL REVIEW D. 2017;95(7).
MLA
Cosyn, Wim, Yu-Bing Dong, S Kumano, et al. “Tensor-polarized Structure Function B1 in the Standard Convolution Description of the Deuteron.” PHYSICAL REVIEW D 95.7 (2017): n. pag. Print.