literature

Near Threshold Neutral Pion Electroproduction at High Momentum Transfers and Generalized Form Factors

Collaboration
Nov, 2012
16 pages
Published in:
  • Phys.Rev.C 87 (2013) 4, 045205
  • Published: Apr 15, 2013
e-Print:
Report number:
  • JLAB-PHY-12-1636

Citations per year

2013201620192022202410
Abstract: (APS)
We report the measurement of near-threshold neutral pion electroproduction cross sections and the extraction of the associated structure functions on the proton in the kinematic range Q2 from 2 to 4.5 GeV2 and W from 1.08 to 1.16 GeV. These measurements allow us to access the dominant pion-nucleon s-wave multipoles E0+ and S0+ in the near-threshold region. In the light-cone sum-rule framework (LCSR), these multipoles are related to the generalized form factors G1π0p(Q2) and G2π0p(Q2). The data are compared to these generalized form factors and the results for G1π0p(Q2) are found to be in good agreement with the LCSR predictions, but the level of agreement with G2π0p(Q2) is poor.
Note:
  • 17 pages, 18 figures, Journal article (Physical Review C)
  • 13.40.Gp
  • 25.30.Rw
  • 14.20.Dh
  • electron p: exclusive reaction
  • pi0: electroproduction
  • momentum transfer: high
  • threshold
  • sum rule: light cone
  • form factor
  • partial wave