Study of Bs0 → J/ψπ+π−K+K− decays

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Aaij, R, Abellán Beteta, C, Ackernley, T, Adeva, B, Adinolfi, M, Afsharnia, H, Aidala, CA, Aiola, S, Ajaltouni, Z, Akar, S et al (show 90 more authors) , Albrecht, J, Alessio, F, Alexander, M, Alfonso Albero, A, Aliouche, Z, Alkhazov, G, Alvarez Cartelle, P, Amato, S, Amhis, Y, An, L, Anderlini, L, Andreianov, A, Andreotti, M, Archilli, F, Artamonov, A, Artuso, M, Arzymatov, K, Aslanides, E, Atzeni, M, Audurier, B, Bachmann, S, Bachmayer, M, Back, JJ, Baker, S, Baladron Rodriguez, P, Balagura, V, Baldini, W, Baptista Leite, J, Barlow, RJ, Barsuk, S, Barter, W, Bartolini, M, Baryshnikov, F, Basels, JM, Bassi, G, Batsukh, B, Battig, A, Bay, A, Becker, M, Bedeschi, F, Bediaga, I, Beiter, A, Belavin, V, Belin, S, Bellee, V, Belous, K, Belov, I, Belyaev, I, Bencivenni, G, Ben-Haim, E, Berezhnoy, A, Bernet, R, Berninghoff, D, Bernstein, HC, Bertella, C, Bertholet, E, Bertolin, A, Betancourt, C, Betti, F, Bettler, MO, Bezshyiko, I, Bhasin, S, Bhom, J, Bian, L, Bieker, MS, Bifani, S, Billoir, P, Birch, M, Bishop, FCR, Bizzeti, A, Bjørn, M, Blago, MP, Blake, T, Blanc, F, Blusk, S, Bobulska, D, Boelhauve, JA, Boente Garcia, O, Boettcher, T, Boldyrev, A, Bondar, A, Bondar, N, Borghi, S, Borisyak, M, Borsato, M, Borsuk, JT, Bouchiba, SA, Bowcock, TJV ORCID: 0000-0002-3505-6915, Boyer, A and Bozzi, C (2021) Study of Bs0 → J/ψπ+π−K+K− decays Journal of High Energy Physics, 2021 (2). 024-. ISSN 1029-8479, 1029-8479

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Abstract

The decays Bs0 → J/ψπ⁺π⁻K⁺K⁻ are studied using a data set corresponding to an integrated luminosity of 9 fb⁻¹, collected with the LHCb detector in proton-proton collisions at centre-of-mass energies of 7, 8 and 13 TeV. The decays Bs0 → J / ψK^{∗ 0}K ¯ ^{∗ 0} and Bs0 → χ<inf>c1</inf>(3872)K⁺K⁻, where the K⁺K⁻pair does not originate from a ϕ meson, are observed for the first time. Precise measurements of the ratios of branching fractions between intermediate χ<inf>c1</inf>(3872)ϕ, J / ψK^{∗ 0}K ¯ ^{∗ 0}, ψ(2S)ϕ and χ<inf>c1</inf>(3872)K⁺K⁻ states are reported. A structure, denoted as X(4740), is observed in the J/ψϕ mass spectrum and, assuming a Breit-Wigner parameterisation, its mass and width are determined to be mX(4740)=4741±6±6MeV/c2,ΓX(4740)=53±15±11MeV, where the first uncertainty is statistical and the second is systematic. In addition, the most precise single measurement of the mass of the Bs0 meson is performed and gives a value of mBs0=5366.98±0.07±0.13MeV/c2. [Figure not available: see fulltext.]

Item Type:	Article
Additional Information:	32 pages, 10 figures; All figures and tables, along with any supplementary material and additional information, are available at https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2020-035.html (LHCb public pages)"
Uncontrolled Keywords:	B physics, Branching fraction, Hadron-Hadron scattering (experiments), Quarkonium, Spectroscopy
Depositing User:	Symplectic Admin
Date Deposited:	24 Feb 2021 14:30
Last Modified:	22 Jan 2026 08:25
DOI:	10.1007/JHEP02(2021)024
Open Access URL:	https://link.springer.com/content/pdf/10.1007/JHEP...
Related Websites:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3116030
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