Observation of excited ωc0 baryons in ωb- → Ξc+ K-π- decays

(LHCb Collaboration)

doi:10.1103/PhysRevD.104.L091102

Observation of excited ωc0 baryons in ωb- → Ξc+ K-π- decays

(LHCb Collaboration)

Science Park 105
University of Zurich
University of Liverpool
Universidade de Santiago de Compostela
University of Bristol
Clermont-Auvergne University
University of Michigan, Ann Arbor
Sezione INFN di Milano
University of Cincinnati
Fakultät Physik
University of Dortmund
European Organization for Nuclear Research
SUPA
University of Glasgow
University of Barcelona
Department of Physics and Astronomy
University of Manchester
Petersburg Nuclear Physics Institute (PNPI)
University of Cambridge
Instituto de Biofisica da UFRJ
Université Paris-Saclay
Istituto Nazionale di Fisica Nucleare, Sezione di Firenze
Sezione INFN di Ferrara
University of Heidelberg
Kurchatov Institute
Syracuse University
Yandex School of Data Analysis
Aix-Marseille Université
Institute of Physics
ENAC-IIC-GEL
University of Warwick
Centro Brasileiro de Pesquisas Fisicas
Imperial College London
Sezione di Genova
National University of Science and Technology “MISIS”
RWTH Aachen University
Istituto Nazionale di Fisica Nucleare, Sezione di Pisa

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Abstract

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.

Original language	English
Article number	L091102
Journal	Physical Review D
Volume	104
Issue number	9
DOIs	https://doi.org/10.1103/PhysRevD.104.L091102
Publication status	Published - 1 Nov 2021

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10.1103/PhysRevD.104.L091102

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@article{1e50b3df0f4b4abcb98e20a8b5f4198c,

title = "Observation of excited ωc0 baryons in ωb- → Ξc+ K-π- decays",

abstract = "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.",

author = "\{(LHCb Collaboration)\} and R. Aaij and \{Abell{\'a}n Beteta\}, C. and T. Ackernley and B. Adeva and M. Adinolfi and H. Afsharnia and Aidala, \{C. A.\} and S. Aiola and Z. Ajaltouni and S. Akar and J. Albrecht and F. Alessio and M. Alexander and \{Alfonso Albero\}, A. and Z. Aliouche and G. Alkhazov and \{Alvarez Cartelle\}, P. and S. Amato and Y. Amhis and L. An and L. Anderlini and A. Andreianov and M. Andreotti and F. Archilli and A. Artamonov and M. Artuso and K. Arzymatov and E. Aslanides and M. Atzeni and B. Audurier and S. Bachmann and M. Bachmayer and Back, \{J. J.\} and \{Baladron Rodriguez\}, P. and V. Balagura and W. Baldini and \{Baptista Leite\}, J. and Barlow, \{R. J.\} and S. Barsuk and W. Barter and M. Bartolini and F. Baryshnikov and Basels, \{J. M.\} and G. Bassi and B. Batsukh and A. Battig and A. Bay and F. Fleuret and E. Maurice and Niel, \{E. M.\}",

note = "Publisher Copyright: {\textcopyright} 2021 CERN.",

year = "2021",

month = nov,

day = "1",

doi = "10.1103/PhysRevD.104.L091102",

language = "English",

volume = "104",

journal = "Physical Review D",

issn = "2470-0010",

publisher = "American Physical Society",

number = "9",

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TY - JOUR

T1 - Observation of excited ωc0 baryons in ωb- → Ξc+ K-π- decays

AU - (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 - Bassi, G.

AU - Batsukh, B.

AU - Battig, A.

AU - Bay, A.

AU - Fleuret, F.

AU - Maurice, E.

AU - Niel, E. M.

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.

U2 - 10.1103/PhysRevD.104.L091102

DO - 10.1103/PhysRevD.104.L091102

M3 - Article

AN - SCOPUS:85120723284

SN - 2470-0010

VL - 104

JO - Physical Review D

JF - Physical Review D

IS - 9

M1 - L091102

ER -

Observation of excited ωc0 baryons in ωb- → Ξc+ K-π- decays

Abstract

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