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Evidence of a J/ψΛ structure and observation of excited Ξ- states in the Ξb-→J/ψΛK- decay. / The LHCb Collaboration ; Бондарь, Александр Евгеньевич; Эйдельман, Семен Исаакович et al.

In: Science Bulletin, Vol. 66, No. 13, 15.07.2021, p. 1278-1287.

Research output: Contribution to journal › Article › peer-review

Harvard

The LHCb Collaboration, Бондарь, АЕ, Эйдельман, СИ, Кроковный, ПП, Кудрявцев, ВН, Мальцев, ТВ, Шехтман, ЛИ & Воробьев, ВС 2021, 'Evidence of a J/ψΛ structure and observation of excited Ξ- states in the Ξb-→J/ψΛK- decay', Science Bulletin, vol. 66, no. 13, pp. 1278-1287. https://doi.org/10.1016/j.scib.2021.02.030

APA

The LHCb Collaboration, Бондарь, А. Е., Эйдельман, С. И., Кроковный, П. П., Кудрявцев, В. Н., Мальцев, Т. В., Шехтман, Л. И., & Воробьев, В. С. (2021). Evidence of a J/ψΛ structure and observation of excited Ξ- states in the Ξb-→J/ψΛK- decay. Science Bulletin, 66(13), 1278-1287. https://doi.org/10.1016/j.scib.2021.02.030

Vancouver

The LHCb Collaboration, Бондарь АЕ, Эйдельман СИ, Кроковный ПП, Кудрявцев ВН, Мальцев ТВ et al. Evidence of a J/ψΛ structure and observation of excited Ξ- states in the Ξb-→J/ψΛK- decay. Science Bulletin. 2021 Jul 15;66(13):1278-1287. doi: 10.1016/j.scib.2021.02.030

Author

The LHCb Collaboration ; Бондарь, Александр Евгеньевич ; Эйдельман, Семен Исаакович et al. / Evidence of a J/ψΛ structure and observation of excited Ξ- states in the Ξb-→J/ψΛK- decay. In: Science Bulletin. 2021 ; Vol. 66, No. 13. pp. 1278-1287.

BibTeX

@article{d00939dc2a774498ab3822579758a644,
title = "Evidence of a J/ψΛ structure and observation of excited Ξ- states in the Ξb-→J/ψΛK- decay",
abstract = "First evidence of a structure in the J/ψΛ invariant mass distribution is obtained from an amplitude analysis of Ξb-→J/ψΛK- decays. The observed structure is consistent with being due to a charmonium pentaquark with strangeness with a significance of 3.1σ including systematic uncertainties and look-elsewhere effect. Its mass and width are determined to be 4458.8±2.9-1.1+4.7MeV and 17.3±6.5-5.7+8.0MeV, respectively, where the quoted uncertainties are statistical and systematic. The structure is also consistent with being due to two resonances. In addition, the narrow excited Ξ- states, Ξ1690- and Ξ1820-, are seen for the first time in a Ξb- decay, and their masses and widths are measured with improved precision. The analysis is performed using pp collision data corresponding to a total integrated luminosity of 9 fb-1, collected with the LHCb experiment at centre-of-mass energies of 7, 8 and 13 TeV.",
keywords = "Exotics, Particle and resonance production, Pentaquark, QCD, Quarkonium, Spectroscopy",
author = "{The LHCb Collaboration} and Бондарь, {Александр Евгеньевич} and Эйдельман, {Семен Исаакович} and Кроковный, {Павел Петрович} and Кудрявцев, {Василий Николаевич} and Мальцев, {Тимофей Владимирович} and Шехтман, {Лев Исаевич} and Воробьев, {Виталий Сергеевич}",
note = "Funding Information: The numerical calculations for this paper have been supported by the Supercomputing Center of Wuhan University. 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?odowska-Curie Actions and ERC (European Union); A*MIDEX, ANR, Labex P2IO and OCEVU, and R?gion Auvergne-Rh?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 Science China Press",
year = "2021",
month = jul,
day = "15",
doi = "10.1016/j.scib.2021.02.030",
language = "English",
volume = "66",
pages = "1278--1287",
journal = "Science Bulletin",
issn = "2095-9273",
publisher = "Elsevier",
number = "13",

}

RIS

TY - JOUR

T1 - Evidence of a J/ψΛ structure and observation of excited Ξ- states in the Ξb-→J/ψΛK- decay

AU - The LHCb Collaboration

AU - Бондарь, Александр Евгеньевич

AU - Эйдельман, Семен Исаакович

AU - Кроковный, Павел Петрович

AU - Кудрявцев, Василий Николаевич

AU - Мальцев, Тимофей Владимирович

AU - Шехтман, Лев Исаевич

AU - Воробьев, Виталий Сергеевич

N1 - Funding Information: The numerical calculations for this paper have been supported by the Supercomputing Center of Wuhan University. 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?odowska-Curie Actions and ERC (European Union); A*MIDEX, ANR, Labex P2IO and OCEVU, and R?gion Auvergne-Rh?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: © 2021 Science China Press

PY - 2021/7/15

Y1 - 2021/7/15

N2 - First evidence of a structure in the J/ψΛ invariant mass distribution is obtained from an amplitude analysis of Ξb-→J/ψΛK- decays. The observed structure is consistent with being due to a charmonium pentaquark with strangeness with a significance of 3.1σ including systematic uncertainties and look-elsewhere effect. Its mass and width are determined to be 4458.8±2.9-1.1+4.7MeV and 17.3±6.5-5.7+8.0MeV, respectively, where the quoted uncertainties are statistical and systematic. The structure is also consistent with being due to two resonances. In addition, the narrow excited Ξ- states, Ξ1690- and Ξ1820-, are seen for the first time in a Ξb- decay, and their masses and widths are measured with improved precision. The analysis is performed using pp collision data corresponding to a total integrated luminosity of 9 fb-1, collected with the LHCb experiment at centre-of-mass energies of 7, 8 and 13 TeV.

AB - First evidence of a structure in the J/ψΛ invariant mass distribution is obtained from an amplitude analysis of Ξb-→J/ψΛK- decays. The observed structure is consistent with being due to a charmonium pentaquark with strangeness with a significance of 3.1σ including systematic uncertainties and look-elsewhere effect. Its mass and width are determined to be 4458.8±2.9-1.1+4.7MeV and 17.3±6.5-5.7+8.0MeV, respectively, where the quoted uncertainties are statistical and systematic. The structure is also consistent with being due to two resonances. In addition, the narrow excited Ξ- states, Ξ1690- and Ξ1820-, are seen for the first time in a Ξb- decay, and their masses and widths are measured with improved precision. The analysis is performed using pp collision data corresponding to a total integrated luminosity of 9 fb-1, collected with the LHCb experiment at centre-of-mass energies of 7, 8 and 13 TeV.

KW - Exotics

KW - Particle and resonance production

KW - Pentaquark

KW - QCD

KW - Quarkonium

KW - Spectroscopy

UR - http://www.scopus.com/inward/record.url?scp=85104149325&partnerID=8YFLogxK

U2 - 10.1016/j.scib.2021.02.030

DO - 10.1016/j.scib.2021.02.030

M3 - Article

C2 - 36654149

AN - SCOPUS:85104149325

VL - 66

SP - 1278

EP - 1287

JO - Science Bulletin

JF - Science Bulletin

SN - 2095-9273

IS - 13

ER -

ID: 34736010