g7a: Search for medium modification of light vector mesons off nuclei
- Spokespersons
- D. Weygand, C. Djalali, M. Kossov
- Year
- 2010
- Abstract
- Due to their long lifetimes, the ω and φ mesons are the ideal candidates for the study of possible modifications of the in-medium meson-nucleon interaction through their absorption inside the nucleus. During the E01-112 experiment at the Thomas Jefferson National Accelerator Facility, the mesons were photoproduced from 2H, C, Ti, Fe, and Pb targets. This paper reports the first measurement of the ratio of nuclear transparencies for the e+e− channel. The ratios indicate larger in-medium widths compared with what have been reported in other reaction channels.
- Publication
-
- M. H. Wood, R. Nasseripour, M. Paolone, C. Djalali, D. P. Weygand, the CLAS Collaboration Absorption of the ω and φ Mesons in Nuclei // PRL 105, 112301 (2010)
- Quantities
- TA(2H,ω) TA(2H,φ) TA(12C,ω) TA(12C,φ)
Measurements
◀ prev
1
next ▶
| ID | Quantity | Beam | Target | Final state |
Q2min, GeV2 |
Q2max, GeV2 |
Wmin, GeV |
Wmax, GeV |
|---|---|---|---|---|---|---|---|---|
| E48M1 | TA(2H,ω) | e | 208Pb | semi-inclusive | 0.0 | 0.0 | 2.8 | 2.8 |
| E48M2 | TA(2H,φ) | e | 208Pb | semi-inclusive | 0.0 | 0.0 | 2.8 | 2.8 |
| E48M3 | TA(12C,ω) | e | 208Pb | semi-inclusive | 0.0 | 0.0 | 2.8 | 2.8 |
| E48M4 | TA(12C,φ) | e | 208Pb | semi-inclusive | 0.0 | 0.0 | 2.8 | 2.8 |
◀ prev
1
next ▶