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2018

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Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/185372

Measurement of CP asymmetries in two-body B (s)0 -meson decays to charged pions and kaons

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Recurs relacionat

https://doi.org/10.1103/PhysRevD.98.032004

Resum

CP asymmetries have been measured recently by the LHCb collaboration in three-body B+ decays to final states involving charged pions and kaons. Large asymmetries with opposite signs at a level of about 60% have been observed in B± → π ±(or K±)π +π − and B± → π ±K+K− for restricted regions in the Dalitz plots involving π +π − and K+K− with low invariant mass. U-spin is shown to predict corresponding ∆S = 0 and ∆S = 1 asymmetries with opposite signs and inversely proportional to their branching ratios, in analogy with a successful relation predicted thirteen years ago between asymmetries in Bs → K−π + and B0 → K+π −. We compare these predictions with the measured integrated asymmetries. Effects of specific resonant or non-resonant partial waves on enhanced asymmetries for low-pair-mass regions of the Dalitz plot are studied in B± → π ±π +π −. The closure of low-mass π +π − and K+K− channels involving only ππ ↔ KK¯ rescattering may explain by CPT approximately equal magnitudes and opposite signs measured in B± → π ±π +π − and B± → π ±K+K−.

Matèries

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

Matèries (anglès)

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

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Articles publicats en revistes (Física Quàntica i Astrofísica)

Citació

ALFONSO ALBERO, Alejandro, et al. Measurement of CP asymmetries in two-body B (s)0 -meson decays to charged pions and kaons. Physical Review D. 2018. Vol. 98, num. 3, pags. 1-15. ISSN 2470-0010. [consulted: 3 of August of 2026]. Available at: https://hdl.handle.net/2445/185372

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