Search for excited B_c ⁺ states

The LHCb Collaboration

Research output: Contribution to journal › Article

Abstract

A search is performed in the invariant mass spectrum of the B_c ⁺π⁺π⁻ system for the excited B_c ⁺ states B_c(2¹S₀)⁺ and B_c(2³S₁)⁺ using a data sample of pp collisions collected by the LHCb experiment at the centre-of-mass energy of s=8 TeV, corresponding to an integrated luminosity of 2 fb⁻¹. No evidence is seen for either state. Upper limits on the ratios of the production cross-sections of the B_c(2¹S₀)⁺ and B_c(2³S₁)⁺ states times the branching fractions of B_c(2¹S₀)⁺ → B_c ⁺π⁺π⁻ and B_c(2³S₁)⁺ → B_c ^* ⁺π⁺π⁻ over the production cross-section of the B_c ⁺ state are given as a function of their masses. They are found to be between 0.02 and 0.14 at 95% confidence level for B_c(2¹S₀)⁺ and B_c(2³S₁)⁺ in the mass ranges [6830, 6890] MeV/c² and [6795, 6890] MeV/c², respectively.[Figure not available: see fulltext.].

Original language	English
Article number	138
Journal	Journal of High Energy Physics
Volume	2018
Issue number	1
DOIs	https://doi.org/10.1007/JHEP01(2018)138
Publication status	Published - 1 Jan 2018

Fingerprint

cross sections

mass spectra

excitation

center of mass

confidence

luminosity

collisions

energy

Keywords

B physics
Hadron-Hadron scattering (experiments)
Spectroscopy

ASJC Scopus subject areas

Nuclear and High Energy Physics

Cite this

The LHCb Collaboration (2018). Search for excited B_c ⁺ states. Journal of High Energy Physics, 2018(1), [138]. https://doi.org/10.1007/JHEP01(2018)138

Search for excited B_c ⁺ states. / The LHCb Collaboration.

In: Journal of High Energy Physics, Vol. 2018, No. 1, 138, 01.01.2018.

Research output: Contribution to journal › Article

The LHCb Collaboration 2018, 'Search for excited B_c ⁺ states', Journal of High Energy Physics, vol. 2018, no. 1, 138. https://doi.org/10.1007/JHEP01(2018)138

The LHCb Collaboration. Search for excited B_c ⁺ states. Journal of High Energy Physics. 2018 Jan 1;2018(1). 138. https://doi.org/10.1007/JHEP01(2018)138

The LHCb Collaboration. / Search for excited B_c ⁺ states. In: Journal of High Energy Physics. 2018 ; Vol. 2018, No. 1.

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abstract = "A search is performed in the invariant mass spectrum of the Bc +π+π− system for the excited Bc + states Bc(21S0)+ and Bc(23S1)+ using a data sample of pp collisions collected by the LHCb experiment at the centre-of-mass energy of s=8 TeV, corresponding to an integrated luminosity of 2 fb−1. No evidence is seen for either state. Upper limits on the ratios of the production cross-sections of the Bc(21S0)+ and Bc(23S1)+ states times the branching fractions of Bc(21S0)+ → Bc +π+π− and Bc(23S1)+ → Bc * +π+π− over the production cross-section of the Bc + state are given as a function of their masses. They are found to be between 0.02 and 0.14 at 95{\%} confidence level for Bc(21S0)+ and Bc(23S1)+ in the mass ranges [6830, 6890] MeV/c2 and [6795, 6890] MeV/c2, respectively.[Figure not available: see fulltext.].",

keywords = "B physics, Hadron-Hadron scattering (experiments), Spectroscopy",

author = "{The LHCb Collaboration} and R. Aaij and B. Adeva and M. Adinolfi and Z. Ajaltouni and S. Akar and J. Albrecht and F. Alessio and M. Alexander and {Alfonso Albero}, A. and S. Ali and G. Alkhazov and {Alvarez Cartelle}, P. and Alves, {A. A.} and S. Amato and S. Amerio and Y. Amhis and L. An and L. Anderlini and G. Andreassi and M. Andreotti and Andrews, {J. E.} and Appleby, {R. B.} and F. Archilli and P. d’Argent and {Arnau Romeu}, J. and A. Artamonov and M. Artuso and E. Aslanides and M. Atzeni and G. Auriemma and M. Baalouch and I. Babuschkin and S. Bachmann and Back, {J. J.} and A. Badalov and C. Baesso and S. Baker and V. Balagura and W. Baldini and A. Baranov and Barlow, {R. J.} and C. Barschel and S. Barsuk and W. Barter and F. Baryshnikov and V. Batozskaya and V. Battista and A. Mazurov and A. Petrov and A. Vagner",

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AU - Alexander, M.

AU - Alfonso Albero, A.

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AU - d’Argent, P.

AU - Arnau Romeu, J.

AU - Artamonov, A.

AU - Artuso, M.

AU - Aslanides, E.

AU - Atzeni, M.

AU - Auriemma, G.

AU - Baalouch, M.

AU - Babuschkin, I.

AU - Bachmann, S.

AU - Back, J. J.

AU - Badalov, A.

AU - Baesso, C.

AU - Baker, S.

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N2 - A search is performed in the invariant mass spectrum of the Bc +π+π− system for the excited Bc + states Bc(21S0)+ and Bc(23S1)+ using a data sample of pp collisions collected by the LHCb experiment at the centre-of-mass energy of s=8 TeV, corresponding to an integrated luminosity of 2 fb−1. No evidence is seen for either state. Upper limits on the ratios of the production cross-sections of the Bc(21S0)+ and Bc(23S1)+ states times the branching fractions of Bc(21S0)+ → Bc +π+π− and Bc(23S1)+ → Bc * +π+π− over the production cross-section of the Bc + state are given as a function of their masses. They are found to be between 0.02 and 0.14 at 95% confidence level for Bc(21S0)+ and Bc(23S1)+ in the mass ranges [6830, 6890] MeV/c2 and [6795, 6890] MeV/c2, respectively.[Figure not available: see fulltext.].

AB - A search is performed in the invariant mass spectrum of the Bc +π+π− system for the excited Bc + states Bc(21S0)+ and Bc(23S1)+ using a data sample of pp collisions collected by the LHCb experiment at the centre-of-mass energy of s=8 TeV, corresponding to an integrated luminosity of 2 fb−1. No evidence is seen for either state. Upper limits on the ratios of the production cross-sections of the Bc(21S0)+ and Bc(23S1)+ states times the branching fractions of Bc(21S0)+ → Bc +π+π− and Bc(23S1)+ → Bc * +π+π− over the production cross-section of the Bc + state are given as a function of their masses. They are found to be between 0.02 and 0.14 at 95% confidence level for Bc(21S0)+ and Bc(23S1)+ in the mass ranges [6830, 6890] MeV/c2 and [6795, 6890] MeV/c2, respectively.[Figure not available: see fulltext.].

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KW - Spectroscopy

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Access to Document

10.1007/JHEP01(2018)138