Research output: Contribution to journal › Article › peer-review
Observation of excited ωc0 baryons in ωb- → Ξc+ K-π- decays. / The LHCb Collaboration.
In: Physical Review D, Vol. 104, No. 9, L091102, 01.11.2021.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Observation of excited ωc0 baryons in ωb- → Ξc+ K-π- decays
AU - The LHCb Collaboration
AU - Aaij, R.
AU - Abellán Beteta, C.
AU - Ackernley, T.
AU - Adeva, B.
AU - Adinolfi, M.
AU - Afsharnia, H.
AU - Aidala, C. A.
AU - Aiola, S.
AU - Ajaltouni, Z.
AU - Akar, S.
AU - Albrecht, J.
AU - Alessio, F.
AU - Alexander, M.
AU - Alfonso Albero, A.
AU - Aliouche, Z.
AU - Alkhazov, G.
AU - Alvarez Cartelle, P.
AU - Amato, S.
AU - Amhis, Y.
AU - An, L.
AU - Anderlini, L.
AU - Andreianov, A.
AU - Andreotti, M.
AU - Archilli, F.
AU - Artamonov, A.
AU - Artuso, M.
AU - Arzymatov, K.
AU - Aslanides, E.
AU - Atzeni, M.
AU - Audurier, B.
AU - Bachmann, S.
AU - Bachmayer, M.
AU - Back, J. J.
AU - Baladron Rodriguez, P.
AU - Balagura, V.
AU - Baldini, W.
AU - Baptista Leite, J.
AU - Barlow, R. J.
AU - Barsuk, S.
AU - Barter, W.
AU - Bartolini, M.
AU - Baryshnikov, F.
AU - Basels, J. M.
AU - Bondar, A.
AU - Eidelman, S.
AU - Krokovny, P.
AU - Kudryavtsev, V.
AU - Maltsev, T.
AU - Shekhtman, L.
AU - Vorobyev, V.
N1 - Funding Information: We express our gratitude to our colleagues in the CERN accelerator departments for the excellent performance of the LHC. We thank the technical and administrative staff at the LHCb institutes. We acknowledge support from CERN and from the national agencies: CAPES, CNPq, FAPERJ and FINEP (Brazil); MOST and NSFC (China); CNRS/IN2P3 (France); BMBF, DFG and MPG (Germany); INFN (Italy); NWO (Netherlands); MNiSW and NCN (Poland); MEN/IFA (Romania); MSHE (Russia); MICINN (Spain); SNSF and SER (Switzerland); NASU (Ukraine); STFC (United Kingdom); DOE NP and NSF (USA). We acknowledge the computing resources that are provided by CERN, IN2P3 (France), KIT and DESY (Germany), INFN (Italy), SURF (Netherlands), PIC (Spain), GridPP (United Kingdom), RRCKI and Yandex LLC (Russia), CSCS (Switzerland), IFIN-HH (Romania), CBPF (Brazil), PL-GRID (Poland) and OSC (USA). We are indebted to the communities behind the multiple open-source software packages on which we depend. Individual groups or members have received support from AvH Foundation (Germany); EPLANET, Marie Skłodowska-Curie Actions and ERC (European Union); A*MIDEX, ANR, Labex P2IO and OCEVU, and Région Auvergne-Rhône-Alpes (France); Key Research Program of Frontier Sciences of CAS, CAS PIFI, CAS CCEPP, Fundamental Research Funds for the Central Universities, and Sci. & Tech. Program of Guangzhou (China); RFBR, RSF and Yandex LLC (Russia); GVA, XuntaGal and GENCAT (Spain); the Royal Society and the Leverhulme Trust (United Kingdom). Publisher Copyright: © 2021 CERN.
PY - 2021/11/1
Y1 - 2021/11/1
N2 - The first observation of the ωb-→Ξc+K-π- decay is reported using p p collision data at center of mass energies of 7, 8, and 13 TeV collected by the LHCb experiment, corresponding to an integrated luminosity of 9 fb-1. Four excited ωc0 baryons are observed in the Ξc+ K- mass projection of the ωb-→Ξc+K-π- decays with the significance of each exceeding five standard deviations. They coincide with the states previously observed in prompt pp and e+e- production. Relative production rates, masses, and natural widths of the states are measured, and a test of spin hypotheses is performed. Moreover, the branching ratio of ωb-→Ξc+K-π- is measured relative to the ωb-→ωc0π- decay mode and a precise measurement of the ωb- mass of 6044.3±1.2±1.1-0.22+0.19 MeV is obtained.
AB - The first observation of the ωb-→Ξc+K-π- decay is reported using p p collision data at center of mass energies of 7, 8, and 13 TeV collected by the LHCb experiment, corresponding to an integrated luminosity of 9 fb-1. Four excited ωc0 baryons are observed in the Ξc+ K- mass projection of the ωb-→Ξc+K-π- decays with the significance of each exceeding five standard deviations. They coincide with the states previously observed in prompt pp and e+e- production. Relative production rates, masses, and natural widths of the states are measured, and a test of spin hypotheses is performed. Moreover, the branching ratio of ωb-→Ξc+K-π- is measured relative to the ωb-→ωc0π- decay mode and a precise measurement of the ωb- mass of 6044.3±1.2±1.1-0.22+0.19 MeV is obtained.
UR - http://www.scopus.com/inward/record.url?scp=85120723284&partnerID=8YFLogxK
U2 - 10.1103/PhysRevD.104.L091102
DO - 10.1103/PhysRevD.104.L091102
M3 - Article
AN - SCOPUS:85120723284
VL - 104
JO - Physical Review D
JF - Physical Review D
SN - 2470-0010
IS - 9
M1 - L091102
ER -
ID: 35027176