Akademska digitalna zbirka SLovenije - logo
E-viri
Celotno besedilo
Recenzirano Odprti dostop
  • Observation of the Bs0→ D+D− decay
    Alessio, F.; Aliouche, Z.; Artamonov, A.; Audurier, B.; Barbetti, M.; Bellee, V.; Borghi, S.; Borsuk, J. T.; Butkevich, A.; Cavallero, G.; Cervenkov, D.; Cholak, S.; D’Ambrosio, C.; Daniel, J.; De Freitas Carneiro Da Graca, U.; De Serio, M.; Dordei, F.; Dudek, M. W.; Durham, J. M.; Esen, S.; Evans, T.; Fan, Y.; Filippov, S.; Fleuret, F.; Forty, R.; Gandelman, M.; Gerick, D.; Giovannetti, M.; Granado Cardoso, L. A.; Graugés, E.; Guittiere, M.; Guz, Y.; Haefeli, G.; Harrison, T.; Hill, D.; Hou, Y.; Idzik, M.; Iniukhin, A.; Jaimes Elles, S. J.; Jevtic, V.; Karpenkov, D.; Keizer, F.; Kenzie, M.; Kharisova, A.; Kopecna, R.; Kostiuk, I.; Kucewicz, W.; Lanfranchi, G.; Langenbruch, C.; Lazzaroni, M.; Legotin, S.; Li, T.; Lin, T.; Liu, H.; Liu, Q.; Lollini, R.; Lopes, J. H.; Maciuc, F.; Majewski, M. W.; Malde, S.; Malecki, B.; Manca, G.; Marangotto, D.; Mcconnell, L.; Millard, E.; Naik, P.; Nunez, C.; Otalora Goicochea, J. M.; Perazzini, S.; Polci, F.; Raab, N. V.; Rangel, M. S.; Ratnikov, F.; Redi, F.; Ren, Z.; Ribatti, R.; Rodrigues, A. B.; Ryzhikov, A.; Sarpis, M.; Shears, T.; Shen, Z.; Sheng, S.; Shimizu, Y.; Skidmore, N.; Spedicato, E.; Sun, Y.; Szabelski, A.; Thomas, E.; Tomassetti, L.; Vos, K.; Vrahas, C.; Wei, Y.; Williams, M.; Wilson, F. F.; Wotton, S. A.; Xu, Q.; Yang, D.; Yeomans, L. E.; Yeroshenko, V.; Zhou, X.

    The journal of high energy physics, 07/2023, Letnik: 2023, Številka: 7
    Journal Article

    A bstract The first observation of the B s 0 → D ∗+ D ∗ − decay and the measurement of its branching ratio relative to the B 0 → D ∗+ D ∗ − decay are presented. The data sample used corresponds to an integrated luminosity of 9 fb − 1 of proton-proton collisions recorded by the LHCb experiment at centre-of-mass energies of 7, 8 and 13 TeV between 2011 and 2018. The decay is observed with more than 10 standard deviations and the time-integrated ratio of branching fractions is determined to be B B s 0 → D ∗ + D ∗ − B B 0 → D ∗ + D ∗ − = 0.269 ± 0.032 ± 0.011 ± 0.008 , where the first uncertainty is statistical, the second systematic and the third due to the uncertainty of the fragmentation fraction ratio f s /f d . The B s 0 → D *+ D * − branching fraction is calculated to be B B s 0 → D ∗ + D ∗ − = 2.15 ± 0.26 ± 0.09 ± 0.06 ± 0.16 × 10 − 4 , where the fourth uncertainty is due to the B 0 → D * + D *− branching fraction. These results are calculated using the average B s 0 meson lifetime in simulation. Correction factors are reported for scenarios where either a purely heavy or a purely light B s 0 eigenstate is considered.

Vnos na polico