Separated kaon electroproduction cross section and the kaon form factor from 6 GeV JLab data
The 1H(e,e'K+)Λ reaction was studied as a function of the Mandelstam variable -t using data from the E01-004 (FPI-2) and E93-018 experiments that were carried out in Hall C at the 6 GeV Jefferson Laboratory. The cross section was fully separated into longitudinal and transverse components, and two interference terms at four-momentum transfers Q2 of 1.00, 1.36, and 2.07 GeV2. The kaon form factor was extracted from the longitudinal cross section using the Regge model by Vanderhaeghen et al. [Phys. Rev. C 57, 1454 (1998)]. Here, the results establish the method, previously used successfully for pion analyses, for extracting the kaon form factor. Data from 12 GeV Jefferson Laboratory experiments are expected to have sufficient precision to distinguish between theoretical predictions, for example, recent perturbative QCD calculations with modern parton distribution amplitudes. The leading-twist behavior for light mesons is predicted to set in for values of Q2 between 5 and 10 GeV2, which makes data in the few-GeV regime particularly interesting. Finally, the Q2 dependence at fixed x and -t of the longitudinal cross section that we extracted seems consistent with the QCD factorization prediction within the experimental uncertainty.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States); Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Nuclear Physics (NP)
- Contributing Organization:
- JLAB FPI-2 and E93-018 Collaboration
- Grant/Contract Number:
- AC02-06CH11357; AC05-06OR23177; AC02-05CH11231; PHY1714133; PHY1306227; PHY1306418
- OSTI ID:
- 1427724
- Alternate ID(s):
- OSTI ID: 1423158; OSTI ID: 1431084; OSTI ID: 1830322
- Report Number(s):
- JLAB-PHY-18-2645; DOE/OR/23177-4348; arXiv:1801.01536; PRVCAN; 141230; TRN: US1802466
- Journal Information:
- Physical Review. C, Vol. 97, Issue 2; ISSN 2469-9985
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Kaon form factor in holographic QCD
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journal | September 2019 |
Kaon-box contribution to the anomalous magnetic moment of the muon | text | January 2019 |
Kaon form factor in holographic QCD | text | January 2019 |
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