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2014-09

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cc-by (c) Garrido Beltrán, Lluis et al., 2014
Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/185622

Measurement of CP asymmetries in the decays B-0 -> K-*0 mu(+) mu(-) and B+ -> K+ mu(+) mu(-)

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https://doi.org/10.1007/JHEP09(2014)177

Abstract

The direct CP asymmetries of the decays B0 → K∗0µ +µ − and B+ → K+µ +µ − are measured using pp collision data corresponding to an integrated luminosity of 3.0 fb−1 collected with the LHCb detector. The respective control modes B0 → J/ψK∗0 and B+ → J/ψK+ are used to account for detection and production asymmetries. The measurements are made in several intervals of µ +µ − invariant mass squared, with the φ(1020) and charmonium resonance regions excluded. Under the hypothesis of zero CP asymmetry in the control modes, the average values of the asymmetries are ACP (B 0 → K∗0µ +µ −) = −0.035 ± 0.024 ± 0.003, ACP (B + → K+µ +µ −) = 0.012 ± 0.017 ± 0.001, where the first uncertainties are statistical and the second are due to systematic effects. Both measurements are consistent with the Standard Model prediction of small CP asymmetry in these decay

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Hadrons, Gran Col·lisionador d'Hadrons, Física de partícules, Experiments

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Hadrons, Large Hadron Collider (France and Switzerland), Particle physics, Experiments

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Articles publicats en revistes (Física Quàntica i Astrofísica)

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GARRIDO BELTRÁN, Lluís, et al. Measurement of CP asymmetries in the decays B-0 -> K-*0 mu(+) mu(-) and B+ -> K+ mu(+) mu(-). Journal of High Energy Physics. 2014. Vol. 9, num. 177, pags. 1-19. ISSN 1126-6708. [consulted: 16 of August of 2026]. Available at: https://hdl.handle.net/2445/185622

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