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Search for Bc+→π+μ+μ- decays and measurement of the branching fraction ratio B(Bc+→ψ(2S)π+)/B(Bc+→J/ψπ+)

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Title: Search for Bc+→π+μ+μ- decays and measurement of the branching fraction ratio B(Bc+→ψ(2S)π+)/B(Bc+→J/ψπ+)
Authors: Aaij, R.1 (AUTHOR), Abdelmotteleb, A.S.W.2 (AUTHOR), Beteta, C. Abellan3 (AUTHOR), Abudinén, F.2 (AUTHOR), Ackernley, T.4 (AUTHOR), Adeva, B.5 (AUTHOR), Adinolfi, M.6 (AUTHOR), Adlarson, P.7 (AUTHOR), Agapopoulou, C.8 (AUTHOR), Aidala, C. A.9 (AUTHOR), Ajaltouni, Z.10 (AUTHOR), Akar, S.11 (AUTHOR), Akiba, K.1 (AUTHOR), Albicocco, P.12 (AUTHOR), Albrecht, J.13 (AUTHOR), Alessio, F.8 (AUTHOR), Alexander, M.14 (AUTHOR), Albero, A. Alfonso15 (AUTHOR), Aliouche, Z.16 (AUTHOR), Cartelle, P. Alvarez17 (AUTHOR)
Source: European Physical Journal C -- Particles & Fields. May2024, Vol. 84 Issue 5, p1-17. 17p.
Abstract: The first search for nonresonant B c + → π + μ + μ - decays is reported. The analysis uses proton–proton collision data collected with the LHCb detector between 2011 and 2018, corresponding to an integrated luminosity of 9 fb - 1 . No evidence for an excess of signal events over background is observed and an upper limit is set on the branching fraction ratio B (B c + → π + μ + μ -) / B (B c + → J / ψ π +) < 2.1 × 10 - 4 at 90 % confidence level. Additionally, an updated measurement of the ratio of the B c + → ψ (2 S) π + and B c + → J / ψ π + branching fractions is reported. The ratio B (B c + → ψ (2 S) π +) / B (B c + → J / ψ π +) is measured to be 0.254 ± 0.018 ± 0.003 ± 0.005 , where the first uncertainty is statistical, the second systematic, and the third is due to the uncertainties on the branching fractions of the leptonic J / ψ and ψ (2 S) decays. This measurement is the most precise to date and is consistent with previous LHCb results. [ABSTRACT FROM AUTHOR]
Copyright of European Physical Journal C -- Particles & Fields is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Search for Bc+→π+μ+μ- decays and measurement of the branching fraction ratio B(Bc+→ψ(2S)π+)/B(Bc+→J/ψπ+)
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  Data: The first search for nonresonant B c + → π + μ + μ - decays is reported. The analysis uses proton–proton collision data collected with the LHCb detector between 2011 and 2018, corresponding to an integrated luminosity of 9 fb - 1 . No evidence for an excess of signal events over background is observed and an upper limit is set on the branching fraction ratio B (B c + → π + μ + μ -) / B (B c + → J / ψ π +) &lt; 2.1 &#215; 10 - 4 at 90 % confidence level. Additionally, an updated measurement of the ratio of the B c + → ψ (2 S) π + and B c + → J / ψ π + branching fractions is reported. The ratio B (B c + → ψ (2 S) π +) / B (B c + → J / ψ π +) is measured to be 0.254 &#177; 0.018 &#177; 0.003 &#177; 0.005 , where the first uncertainty is statistical, the second systematic, and the third is due to the uncertainties on the branching fractions of the leptonic J / ψ and ψ (2 S) decays. This measurement is the most precise to date and is consistent with previous LHCb results. [ABSTRACT FROM AUTHOR]
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  Data: &lt;i&gt;Copyright of European Physical Journal C -- Particles &amp; Fields is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder&#39;s express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.&lt;/i&gt; (Copyright applies to all Abstracts.)
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