Observations are reported of different sources of CP violation from an amplitude analysis of Bþ → πþπþπ− decays, based on a data sample corresponding to an integrated luminosity of 3 fb−1 of pp collisions recorded with the LHCb detector. A large CP asymmetry is observed in the decay amplitude involving the tensor f2ð1270Þ resonance, and in addition significant CP violation is found in the πþπ−S wave at low invariant mass. The presence of CP violation related to interference between the πþπ−S wave and the P wave Bþ → ρð770Þ0πþ amplitude is also established; this causes large local asymmetries but cancels when integrated over the phase space of the decay. The results p

Observation of several sources of CP violation in B+ →π+π+π- decays / Aaij, R., Abellán Beteta, C., Adeva, B., Adinolfi, M., Aidala, C.A., Ajaltouni, Z., Akar, S., Albicocco, P., Albrecht, J., Alessio, F., Alexander, M., Alfonso Albero, A., Alkhazov, G., Alvarez Cartelle, P., Alves, A.A., Amato, S., Amhis, Y., An, L., Anderlini, L., Andreassi, G., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 124:3(2020). [10.1103/PhysRevLett.124.031801]

Observation of several sources of CP violation in B+ →π+π+π- decays

Capriotti, L.;Casse, G.;Sarti, A.;Sciubba, A.;
2020

Abstract

Observations are reported of different sources of CP violation from an amplitude analysis of Bþ → πþπþπ− decays, based on a data sample corresponding to an integrated luminosity of 3 fb−1 of pp collisions recorded with the LHCb detector. A large CP asymmetry is observed in the decay amplitude involving the tensor f2ð1270Þ resonance, and in addition significant CP violation is found in the πþπ−S wave at low invariant mass. The presence of CP violation related to interference between the πþπ−S wave and the P wave Bþ → ρð770Þ0πþ amplitude is also established; this causes large local asymmetries but cancels when integrated over the phase space of the decay. The results p
2020
B physics; Hadron-Hadron scattering (experiments); Heavy quark production; spectroscopy
01 Pubblicazione su rivista::01a Articolo in rivista
Observation of several sources of CP violation in B+ →π+π+π- decays / Aaij, R., Abellán Beteta, C., Adeva, B., Adinolfi, M., Aidala, C.A., Ajaltouni, Z., Akar, S., Albicocco, P., Albrecht, J., Alessio, F., Alexander, M., Alfonso Albero, A., Alkhazov, G., Alvarez Cartelle, P., Alves, A.A., Amato, S., Amhis, Y., An, L., Anderlini, L., Andreassi, G., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 124:3(2020). [10.1103/PhysRevLett.124.031801]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1579552
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