RT Journal Article
T1 First measurement of the CP -violating phase φdd ̄ in s Bs0→(K+π−)(K−π+) decays
A1 LHCb Collaboration:, 
A1 Adeva Andany, Bernardo
A1 Álvarez Cartelle, Paula
A1 Borsato, Martino
A1 Chobanova, Veronika
A1 Cid Vidal, Xabier
A1 Dosil Suárez, Álvaro
A1 Fernández Prieto, Antonio
A1 Gallas Torreira, Abraham
A1 García Pardiñas, Julián
A1 Lemos Cid, Edgar
A1 Lucio Martinez, M.
A1 Martínez Santos, Diego
A1 Pló Casasús, Máximo
A1 Prisciandaro, Jessica
A1 Ramos Pernas, Miguel
A1 Romero Vidal, Antonio
A1 Saborido Silva, Juan José
A1 Sanmartín Sedes, Brais
A1 Santamarina Ríos, Cibrán
A1 Vázquez Regueiro, Pablo
A1 Vieites Díaz, María
K1 CP violation
K1 Flavour Changing Neutral Currents
K1 B physics
K1 Oscillation
K1 Hadron-Hadron scattering (experiments)
AB A flavour-tagged decay-time-dependent amplitude analysis of Bs0 →(K+π−)(K−π+) decays is presented in the K±π∓ mass range from 750 to 1600MeV/c2. The analysis uses pp collision data collected with the LHCb detector at centre-of-mass energies of 7 and 8TeV, corresponding to an integrated luminosity of 3.0fb−1. Several quasi-two-body decay modes are considered, corresponding to K±π∓ combinations with spin 0, 1 and 2, which are dominated by the K0∗ (800)0 and K0∗ (1430)0 , the K ∗ (892)0 and the K2∗(1430)0 resonances, respectively. The longitudinal polarisation fraction for the Bs0 → K ∗ (892)0 K ∗ (892)0 decay is measured as fL = 0.208 ± 0.032 ± 0.046, where the first uncertainty is statistical and the second is systematic. The first measurement of the dd mixing-induced CP-violating phase, φs , in b → dds transitions is performed, yielding a value of φdd ̄ = −0.10 ± 0.13 (stat) ± 0.14 (syst) rad
PB Springer
YR 2018
FD 2018-03-23
LK https://hdl.handle.net/10347/45048
UL https://hdl.handle.net/10347/45048
LA eng
NO The LHCb collaboration., Aaij, R., Adeva, B. et al. First measurement of the CP-violating phase   in B  0 s   → (K+π−)(K−π+) decays. J. High Energ. Phys. 2018, 140 (2018). https://doi.org/10.1007/JHEP03(2018)140
DS Minerva
RD 25 may 2026