Observation of a Charmed Baryon Decaying to D0 p at a Mass Near 2.94 GeV/c2 | |
Aubert, B. | |
Stanford Linear Accelerator Center | |
关键词: Experiment-Hep,Hepex; Decay Experiment-Hep,Hepex; Annihilation; 72 Physics Of Elementary Particles And Fields; Baryons; | |
DOI : 10.2172/878345 RP-ID : SLAC-PUB-11786 RP-ID : AC02-76SF00515 RP-ID : 878345 |
|
美国|英语 | |
来源: UNT Digital Library | |
【 摘 要 】
A search for charmed baryons decaying to D{sup 0}p reveals two states: the {Lambda}{sub c}(2880){sup +} baryon and a previously unobserved state at a mass of [2939.8 {+-} 1.3 (stat.) {+-} 1.0 (syst.)] MeV/c{sup 2} and with an intrinsic width of [17.5 {+-} 5.2 (stat.) {+-} 5.9 (syst.)] MeV. Consistent and significant signals are observed for the K{sup -}{pi}{sup +} and K{sup -}{pi}{sup +}{pi}{sup -}{pi}{sup +} decay modes of the D{sup 0} in 287 fb{sup -1} annihilation data recorded by the BABAR detector at a center-of-mass energy of 10.58 GeV. There is no evidence in the D{sup +}p spectrum of doubly-charged partners. The mass and intrinsic width of the {Lambda}{sub c}(2880){sup +} baryon and relative yield of the two baryons are also measured.
【 预 览 】
Files | Size | Format | View |
---|---|---|---|
878345.pdf | 228KB | download |