Observation of the $$ {B}_s^0 $$ → D*±D∓ decay



Aaij, R, Abellán Beteta, C, Ackernley, T, Adeva, B, Adinolfi, M, Afsharnia, H, Aidala, CA, Aiola, S, Ajaltouni, Z, Akar, S
et al (show 963 more authors) (2021) Observation of the $$ {B}_s^0 $$ → D*±D∓ decay. Journal of High Energy Physics, 2021 (3).

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Abstract

<jats:title>A<jats:sc>bstract</jats:sc> </jats:title><jats:p>A search for the <jats:inline-formula><jats:alternatives><jats:tex-math>$$ {B}_{\mathrm{s}}^0 $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msubsup> <mml:mi>B</mml:mi> <mml:mi>s</mml:mi> <mml:mn>0</mml:mn> </mml:msubsup> </mml:math></jats:alternatives></jats:inline-formula><jats:italic>→ D</jats:italic><jats:sup>*±</jats:sup><jats:italic>D</jats:italic><jats:sup>∓</jats:sup> decay is performed using proton-proton collision data at centre-of-mass energies of 7, 8 and 13 TeV collected by the LHCb experiment, corresponding to an integrated luminosity of 9 fb<jats:sup><jats:italic>−</jats:italic>1</jats:sup>. The decay is observed with a high significance and its branching fraction relative to the <jats:italic>B</jats:italic><jats:sup>0</jats:sup><jats:italic>→ D</jats:italic><jats:sup>*±</jats:sup><jats:italic>D</jats:italic><jats:sup>∓</jats:sup> decay is measured to be<jats:disp-formula><jats:alternatives><jats:tex-math>$$ \frac{\mathrm{\mathcal{B}}\left({B}_s^0\to {D}^{\ast \pm }{D}^{\mp}\right)}{\left({B}^0\to {D}^{\ast \pm }{D}^{\mp}\right)}=0.137\pm 0.017\pm 0.002\pm 0.006, $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mfrac> <mml:mrow> <mml:mi>ℬ</mml:mi> <mml:mfenced> <mml:mrow> <mml:msubsup> <mml:mi>B</mml:mi> <mml:mi>s</mml:mi> <mml:mn>0</mml:mn> </mml:msubsup> <mml:mo>→</mml:mo> <mml:msup> <mml:mi>D</mml:mi> <mml:mrow> <mml:mo>∗</mml:mo> <mml:mo>±</mml:mo> </mml:mrow> </mml:msup> <mml:msup> <mml:mi>D</mml:mi> <mml:mo>∓</mml:mo> </mml:msup> </mml:mrow> </mml:mfenced> </mml:mrow> <mml:mfenced> <mml:mrow> <mml:msup> <mml:mi>B</mml:mi> <mml:mn>0</mml:mn> </mml:msup> <mml:mo>→</mml:mo> <mml:msup> <mml:mi>D</mml:mi> <mml:mrow> <mml:mo>∗</mml:mo> <mml:mo>±</mml:mo> </mml:mrow> </mml:msup> <mml:msup> <mml:mi>D</mml:mi> <mml:mo>∓</mml:mo> </mml:msup> </mml:mrow> </mml:mfenced> </mml:mfrac> <mml:mo>=</mml:mo> <mml:mn>0.137</mml:mn> <mml:mo>±</mml:mo> <mml:mn>0.017</mml:mn> <mml:mo>±</mml:mo> <mml:mn>0.002</mml:mn> <mml:mo>±</mml:mo> <mml:mn>0.006</mml:mn> <mml:mo>,</mml:mo> </mml:math></jats:alternatives></jats:disp-formula></jats:p><jats:p>where the first uncertainty is statistical, the second systematic and the third is due to the uncertainty on the ratio of the <jats:inline-formula><jats:alternatives><jats:tex-math>$$ {B}_{\mathrm{s}}^0 $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msubsup> <mml:mi>B</mml:mi> <mml:mi>s</mml:mi> <mml:mn>0</mml:mn> </mml:msubsup> </mml:math></jats:alternatives></jats:inline-formula> and <jats:italic>B</jats:italic><jats:sup>0</jats:sup> hadronisation fractions.</jats:p>

Item Type: Article
Divisions: Faculty of Science and Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 21 Apr 2021 10:25
Last Modified: 27 Nov 2021 15:31
DOI: 10.1007/jhep03(2021)099
Open Access URL: https://link.springer.com/content/pdf/10.1007/JHEP...
URI: https://livrepository.liverpool.ac.uk/id/eprint/3120043