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)

(Astro)-Particles Physics

Research output: Contribution to Journal › Article › Academic › peer-review

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
Pages (from-to)	1-14
Number of pages	14
Journal	Physical Review D
Volume	104
Issue number	9
DOIs	https://doi.org/10.1103/PhysRevD.104.L091102
Publication status	Published - 1 Nov 2021

Bibliographical note

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).

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© 2021 CERN.

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@article{c9d15056400f430caa92f37d50efa4ac,

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 = "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 M. Becker and F. Bedeschi and I. Bediaga and A. Beiter and V. Belavin and S. Belin and V. Bellee and K. Belous and I. Belov and I. Belyaev and G. Bencivenni and E. Ben-Haim and A. Berezhnoy and R. Bernet and D. Berninghoff and Bernstein, {H. C.} and C. Bertella and A. Bertolin and C. Betancourt and F. Betti and Ia Bezshyiko and S. Bhasin and J. Bhom and L. Bian and Bieker, {M. S.} and S. Bifani and P. Billoir and M. Birch and Bishop, {F. C.R.} and A. Bitadze and A. Bizzeti and M. Bj{\o}rn and Blago, {M. P.} and T. Blake and F. Blanc and S. Blusk and D. Bobulska and Boelhauve, {J. A.} and {Boente Garcia}, O. and T. Boettcher and A. Boldyrev and A. Bondar and N. Bondar and S. Borghi and M. Borisyak and M. Borsato and Borsuk, {J. T.} and Bouchiba, {S. A.} and Bowcock, {T. J.V.} and A. Boyer and C. Bozzi and Bradley, {M. J.} and S. Braun and {Brea Rodriguez}, A. and M. Brodski and J. Brodzicka and {Brossa Gonzalo}, A. and D. Brundu and A. Buonaura and C. Burr and A. Bursche and A. Butkevich and Butter, {J. S.} and J. Buytaert and W. Byczynski and S. Cadeddu and H. Cai and R. Calabrese and L. Calefice and {Calero Diaz}, L. and S. Cali and R. Calladine and M. Calvi and {Calvo Gomez}, M. and {Camargo Magalhaes}, P. and P. Campana and {Campoverde Quezada}, {A. F.} and S. Capelli and L. Capriotti and A. Carbone and G. Carboni and R. Cardinale and A. Cardini and I. Carli and P. Carniti and L. Carus and {Carvalho Akiba}, K. and {Casais Vidal}, A. and G. Casse and M. Cattaneo and G. Cavallero and S. Celani and J. Cerasoli and Chadwick, {A. J.} and Chapman, {M. G.} and M. Charles and Ph Charpentier and G. Chatzikonstantinidis and {Chavez Barajas}, {C. A.} and M. Chefdeville and C. Chen and S. Chen and A. Chernov and V. Chobanova and S. Cholak and M. Chrzaszcz and A. Chubykin and V. Chulikov and P. Ciambrone and Cicala, {M. F.} and {Cid Vidal}, X. and G. Ciezarek and Clarke, {P. E.L.} and M. Clemencic and Cliff, {H. V.} and J. Closier and Cobbledick, {J. L.} and V. Coco and Coelho, {J. A.B.} and J. Cogan and E. Cogneras and L. Cojocariu and P. Collins and T. Colombo and L. Congedo and A. Contu and N. Cooke and G. Coombs and I. Corredoira and G. 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note = "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 Sk{\l}odowska-Curie Actions and ERC (European Union); A*MIDEX, ANR, Labex P2IO and OCEVU, and R{\'e}gion Auvergne-Rh{\^o}ne-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: {\textcopyright} 2021 CERN.",

year = "2021",

month = nov,

day = "1",

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

language = "English",

volume = "104",

pages = "1--14",

journal = "Physical Review D",

issn = "2470-0010",

publisher = "American Physical Society",

number = "9",

}

TY - JOUR

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

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AU - (LHCb Collaboration)

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

UR - http://www.scopus.com/inward/citedby.url?scp=85120723284&partnerID=8YFLogxK

U2 - 10.1103/PhysRevD.104.L091102

DO - 10.1103/PhysRevD.104.L091102

M3 - Article

AN - SCOPUS:85120723284

SN - 2470-0010

VL - 104

SP - 1

EP - 14

JO - Physical Review D

JF - Physical Review D

IS - 9

M1 - L091102

ER -

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

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