dc.contributor.author |
CMS Collaboration |
en_US |
dc.contributor.author |
Sirunyan, A. M. |
en_US |
dc.contributor.author |
DUBE, SOURABH |
en_US |
dc.contributor.author |
KANSAL, B. |
en_US |
dc.contributor.author |
PANDEY, S. |
en_US |
dc.contributor.author |
RANE, A. |
en_US |
dc.contributor.author |
RASTOGI, A. |
en_US |
dc.contributor.author |
SHARMA, SEEMA et al. |
en_US |
dc.date.accessioned |
2021-07-23T11:33:16Z |
|
dc.date.available |
2021-07-23T11:33:16Z |
|
dc.date.issued |
2021-06 |
en_US |
dc.identifier.citation |
Physical Review Letters, 126(25), 252003. |
en_US |
dc.identifier.issn |
1079-7114 |
en_US |
dc.identifier.issn |
0031-9007 |
en_US |
dc.identifier.uri |
http://dr.iiserpune.ac.in:8080/xmlui/handle/123456789/6095 |
|
dc.identifier.uri |
https://doi.org/10.1103/PhysRevLett.126.252003 |
en_US |
dc.description.abstract |
The Ξ−bπ+π− invariant mass spectrum is investigated with an event sample of proton proton collisions at √s=13 TeV, collected by the CMS experiment at the LHC in 2016–2018 and corresponding to an integrated luminosity of 140fb−1. The ground state Ξ−b is reconstructed via its decays to J/ψΞ−and J/ψΛK−. A narrow resonance, labeled Ξb(6100)−, is observed at a Ξ −bπ+π−invariant mass of 6100.3±0.2(stat)±0.1(syst)±0.6(Ξ−b)MeV, where the last uncertainty reflects the precision of the Ξ−b baryon mass. The upper limit on the Ξb(6100)−natural width is determined to be 1.9 MeV at 95% confidence level. The low Ξb(6100)− signal yield observed in data does not allow a measurement of the quantum numbers of the new state. However, following analogies with the established excited Ξc baryon states, the new Ξb(6100)−resonance and its decay sequence are consistent with the orbitally excited Ξ−b baryon, with spin and parity quantum numbers JP=3/2−. |
en_US |
dc.language.iso |
en |
en_US |
dc.publisher |
American Physical Society |
en_US |
dc.subject |
Physics |
en_US |
dc.subject |
2021-JUL-WEEK3 |
en_US |
dc.subject |
TOC-JUL-2021 |
en_US |
dc.subject |
2021 |
en_US |
dc.title |
Observation of a New Excited Beauty Strange Baryon Decaying to Ξb−π+π− |
en_US |
dc.type |
Article |
en_US |
dc.contributor.department |
Dept. of Physics |
en_US |
dc.identifier.sourcetitle |
Physical Review Letters |
en_US |
dc.publication.originofpublisher |
Foreign |
en_US |