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Measurement of the ratio of branching fractions of the decays $\Lambda^0_b \to \psi(2S) \Lambda$ and $\Lambda^0_b \! \to J/ \psi \Lambda$


LHCb Collaboration; Bernet, Roland; Müller, Katharina; Owen, Patrick; Serra, Nicola; Steinkamp, Olaf; Vollhardt, Achim; et al (2019). Measurement of the ratio of branching fractions of the decays $\Lambda^0_b \to \psi(2S) \Lambda$ and $\Lambda^0_b \! \to J/ \psi \Lambda$. Journal of High Energy Physics, 03:126.

Abstract

Using pp collisions corresponding to 3 $fb^{−1}$ integrated luminosity, recorded by the LHCb experiment at centre-of-mass energies of 7 and 8 TeV, the ratio of branching fractions
$ \mathrm{\mathcal{B}}\left({\Lambda}_b^0\to \psi (2S)\Lambda \right)/\mathrm{\mathcal{B}}\left({\Lambda}_b^0\to J/\psi \Lambda \right)=0.513\pm 0.023\left(\mathrm{stat}\right)\pm 0.016\left(\mathrm{syst}\right)\pm 0.011\left(\mathrm{\mathcal{B}}\right)$
is determined. The first uncertainty is statistical, the second is systematic and the third is due to the external branching fractions used.

Abstract

Using pp collisions corresponding to 3 $fb^{−1}$ integrated luminosity, recorded by the LHCb experiment at centre-of-mass energies of 7 and 8 TeV, the ratio of branching fractions
$ \mathrm{\mathcal{B}}\left({\Lambda}_b^0\to \psi (2S)\Lambda \right)/\mathrm{\mathcal{B}}\left({\Lambda}_b^0\to J/\psi \Lambda \right)=0.513\pm 0.023\left(\mathrm{stat}\right)\pm 0.016\left(\mathrm{syst}\right)\pm 0.011\left(\mathrm{\mathcal{B}}\right)$
is determined. The first uncertainty is statistical, the second is systematic and the third is due to the external branching fractions used.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Scopus Subject Areas:Physical Sciences > Nuclear and High Energy Physics
Language:English
Date:2019
Deposited On:10 Jan 2020 08:12
Last Modified:13 May 2020 23:37
Publisher:Springer
ISSN:1029-8479
OA Status:Gold
Free access at:Publisher DOI. An embargo period may apply.
Publisher DOI:https://doi.org/10.1007/JHEP03(2019)126

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