Measurement of b-hadron fractions in 13 TeV pp collisions

• Main Authors: Andreotti, M, Baldini, W, Barsuk, S, Bediaga, I, Belin, S, Beliy, N, Bertholet, E, Betancourt, C, Billoir, P, Bocci, V, Borsato, M, Cardinale, R, Cardini, A, Cattaneo, M, Chefdeville, M, Chen, S, Chobanova, V, Ciambrone, P, Cogan, J, Cojocariu, L, Corvo, M, Di Nezza, P, Dordei, F, Dziurda, A, Dzyuba, A, Easo, S, Egede, U, Ferro-Luzzi, M, Fontana, M, Forty, R, Gan, Y, Gandelman, M, Ghez, Ph, Govorkova, E, Hu, W, Huard, Z. C, Hushchyn, M, Jiang, F, Johnson, D, Kenzie, M, Kirn, T, Klaver, S, Kolpin, M, Kreps, M, Kuonen, A. K, Lacarrere, D, Lafferty, G, Latham, T, Lesiak, T, Liu, G, Liu, X, Luppi, E, Maddrell-Mander, S, Martinelli, M, Materok, M, Matev, R, Meaux, C, Merli, A, Nandakumar, R, Nandi, A, Neri, N, Oldeman, R, Petrolini, A, Pietrzyk, G, Pinzino, J, Piucci, A, Redi, F, Reichert, S, Robert, A, Vidal, A. Romero, Vidal, J. Ruiz, Silva, J. J. Saborido, Mayordomo, C. Sanchez, Santovetti, E, Savrina, D, Schreiner, H. F, Sciubba, A, Simone, S, Skiba, I, Skidmore, N, Skwarnicki, T, Stracka, S, Stramaglia, M. E, Tonelli, D, Tournefier, E, Tran, M. T, Tuning, N, Valat, S, Veronesi, M, Vilasis-Cardona, X, Vorobyev, A, Walsh, J, Wang, M, Websdale, D, Wotton, S. A, Xu, Z, Yu, J, Zavertyaev, M, Zhang, W. C, Zhukov, V
• Format: Journal Article
• Language: English
• Published: 14-08-2019
• Subjects: Physics - High Energy Physics - Experiment; Physics - High Energy Physics - Phenomenology
• DOI: 10.48550/arxiv.1902.06794

Phys.Rev. D100 (2019) no.3, 031102 The production fractions of $\overline{B}_s^0$ and $\Lambda_b^0$ hadrons,
normalized to the sum of $B^-$ and $\overline{B}^0$ fractions, are measured in
13 TeV pp collisions using data collected by the LHCb experiment, corresponding
to an integrated luminosity of 1.67/fb. These ratios, averaged over the
$b$-hadron transverse momenta from 4 to 25 GeV and pseudorapidity from 2 to 5,
are $0.122 \pm 0.006$ for $\overline{B}_s^0$, and $0.259 \pm 0.018$ for
$\Lambda_b^0$, where the uncertainties arise from both statistical and
systematic sources. The $\Lambda_b^0$ ratio depends strongly on transverse
momentum, while the $\overline{B}_s^0$ ratio shows a mild dependence. Neither
ratio shows variations with pseudorapidity. The measurements are made using
semileptonic decays to minimize theoretical uncertainties. In addition, the
ratio of $D^+$ to $D^0$ mesons produced in the sum of $\overline{B}^0$ and
$B^-$ semileptonic decays is determined as $0.359\pm0.006\pm 0.009$, where the
uncertainties are statistical and systematic.