Observation of a new Ξb baryon

S Chatrchyan; Petar Adžić; Miloš Đorđević; M Ekmedzic; D Krpic; Jovan Milošević; Predrag Milenović; V Rekovic; CMS Collaboration

doi:10.1103/physrevlett.108.252002

Back

Journal article

Open access

Peer reviewed

Observation of a new Ξb baryon

S Chatrchyan, Petar Adžić, Miloš Đorđević, M Ekmedzic, D Krpic, Jovan Milošević, Predrag Milenović, V Rekovic and CMS Collaboration

Physical review letters, Vol.108(25), 252002

06/01/2012

DOI: 10.1103/physrevlett.108.252002

PMID: 23004588

Files and links (1)

url

https://doi.org/10.1103/physrevlett.108.252002View

Published (Version of record) Open Access

Abstract

Artículo escrito por un elevado número de autores, solo se referencian el que aparece en primer lugar, el nombre del grupo de colaboración, si le hubiere, y los autores pertenecientes a la UAM The observation of a new b baryon via its strong decay into Ξ−bπ+ (plus charge conjugates) is reported. The measurement uses a data sample of pp collisions at s√=7 TeV collected by the CMS experiment at the LHC, corresponding to an integrated luminosity of 5.3 fb−1. The known Ξ−b baryon is reconstructed via the decay chain Ξ−b→J/ψΞ−→μ+μ−Λ0π−, with Λ0→pπ−. A peak is observed in the distribution of the difference between the mass of the Ξ−bπ+ system and the sum of the masses of the Ξ−b and π+, with a significance exceeding 5 standard deviations. The mass difference of the peak is 14.84±0.74(stat)±0.28(syst) MeV. The new state most likely corresponds to the JP=3/2+ companion of the Ξb We thank the technical and administrative staff at CERN and other CMS institutes, and acknowledge support from: FMSR (Austria); FNRS and FWO (Belgium); CNPq, CAPES, FAPERJ, and FAPESP (Brazil); MES (Bulgaria); CERN; CAS, MoST, and NSFC (China); COLCIENCIAS (Colombia); MSES (Croatia); RPF (Cyprus); MoER, SF0690030s09 and ERDF (Estonia); Academy of Finland, MEC, and HIP (Finland); CEA and CNRS/IN2P3 (France); BMBF, DFG, and HGF (Germany); GSRT (Greece); OTKA and NKTH (Hungary); DAE and DST (India); IPM (Iran); SFI (Ireland); INFN (Italy); NRF and WCU (Korea); LAS (Lithuania); CINVESTAV, CONACYT, SEP, and UASLP-FAI (Mexico); MSI (New Zealand); PAEC (Pakistan); MSHE and NSC (Poland); FCT (Portugal); JINR (Armenia, Belarus, Georgia, Ukraine, Uzbekistan); MON, RosAtom, RAS and RFBR (Russia); MSTD (Serbia); MICINN and CPAN (Spain); Swiss Funding Agencies (Switzerland); NSC (Taipei); TUBITAK and TAEK (Turkey); STFC (United Kingdom); DOE and NSF (USA)

Physics

Astronomy (all)

Física

Physique des particules élémentaires

Details

Title: Subtitle: Observation of a new Ξb baryon
Creators: S Chatrchyan
Petar Adžić
Miloš Đorđević
M Ekmedzic
D Krpic
Jovan Milošević
Predrag Milenović
V Rekovic
CMS Collaboration
Contributors: Y Onel (Contributor) - University of Iowa, Physics and Astronomy
Resource Type: Journal article
Publication Details: Physical review letters, Vol.108(25), 252002
DOI: 10.1103/physrevlett.108.252002
PMID: 23004588
NLM abbreviation: Phys Rev Lett
ISSN: 0031-9007
eISSN: 1079-7114
Publisher: American Physical Society
Grant note: 098-0982887-2878 / Ministry of Science, Education and Sports of the Republic of Croatia (MSES) (irb_hr______::MZOS)
Language: English
Date published: 06/01/2012
Academic Unit: Physics and Astronomy
Record Identifier: 9984199800502771

Metrics

12 Record Views

74 Times Cited - Web of Science