Publications
Publication Information
| Title | Antibaryon Photoproduction using CLAS at Jefferson Lab |
| Authors | William Phelps |
| JLAB number | JLAB-PHY-17-2662 |
| LANL number | (None) |
| Other number | DOE/OR/23177-4547 |
| Document Type(s) | (Thesis) |
| Associated with EIC: | No |
| Supported by Jefferson Lab LDRD Funding: | No |
| Funding Source: | Nuclear Physics (NP) |
|
Thesis A PHD thesis Advisor(s) : Lei Guo (Florida International University) Stepan Stepanyan (Jlab) | |
| Publication Abstract: | Antibaryon production has been investigated since the advent of nuclear physics, largely motivated by the potential for baryon-antibaryon bound states. Due to the recent availability of high statistics experiments there has been a renewed interest in how antibaryons are created in photoproduction. The g12 (E04-005) experiment conducted at Thomas Jefferson National Accelerator Facility used the CEBAF Large Acceptance Spectrometer to provide the worlds largest dataset for baryon-antibaryon photoproduction on a liquid hydrogen target. The focus of this work is to investigate the photoproduction mechanism of gp --> pp¯p through detailed differential cross section measurements from 3.95 to 5.45 GeV. These first time results as well as the resulting total cross section measurement are reported. In particular the energy dependence (s(Eg)) and the angular dependence (ds/d cos(qCM ¯ p )) have interesting features that have never been seen before. On the other hand, the mass distributions (ds/dM(pp) and ds/dM(p ¯ p) do not show evidence for previously reported narrow resonances. In addition, the first time total cross section mesurement of an antineutron in photoproduction using the reaction gp --> pp ¯np- is reported. The significance and implications of these results will be discussed as well. |
| Experiment Numbers: | E04-005 |
| Group: | Hall B |
| Document: | |
| DOI: | |
| Accepted Manuscript: | |
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