Journal Article

Measurement of the B± production cross-section in pp collisions at s=7 and 13 TeV

Wicht, J., Vorobyev, V., Chefdeville, M., Di Canto, A., Alexander, M., Jones, C. R., Durante, P., Gao, Y., Yang, Z., Cardinale, R., Gianì, S., Meinert, N., Mead, J. V., Barlow, R. J., Nikodem, T., Schmelling, M., Vázquez Sierra, C., Tourinho Jadallah Aoude, R., Cai, H., Bedeschi, F., Swientek, K., Stefko, P., Millard, E., Pugatch, V., Ketel, T., Ekelhof, R., Ferro-Luzzi, M., Lefèvre, R., Golubkov, D., Lemos Cid, E., Dalseno, J., Jawahery, A., Lai, A., Schneider, O., Rama, M., Bozzi, C., Carniti, P., Tran, M. T., Fontana, M., Ruiz Valls, P., Straticiuc, M., Cenci, R., Smith, E., Gibson, V., Mulder, M., Ramos Pernas, M., Jiang, F., Bezshyiko, Ia, Beliy, N., Tuning, N., Kvaratskheliya, T., Luo, H., Morris, A. B., Williams, T., Carboni, G., McNulty, R., Baldini, W., Ponce, S., Jalocha, J., Karacson, M., Nguyen-Mau, C., Pomery, G. J., Decamp, D., Hancock, T. H., Skidmore, N., Romanovskiy, V., Kolpin, M., Malecki, B., Cadeddu, S., Pappagallo, M., Sirendi, M., Kecke, M., Marino, P., Merli, A., Shcheglov, Y., Dey, B., Yu, J., Byczynski, W., Auriemma, G., Zarebski, K. A., Hatch, M., Mogini, A., Yin, H., Garsed, P. J., Quagliani, R., Smith, J., Pikies, M., Nguyen, T

2017

Overview

A bstract The production of B ± mesons is studied in pp collisions at centre-of-mass energies of 7 and 13 TeV, using B ± → J / ψ K ± decays and data samples corresponding to 1.0 fb −1 and 0.3 fb −1 , respectively. The production cross-sections summed over both charges and integrated over the transverse momentum range 0 < p T < 40 GeV/ c and the rapidity range 2.0 < y < 4.5 are measured to be σ pp → B ± X , s = 7 T e V = 43.0 ± 0.2 ± 2.5 ± 1.7 μ b , σ pp → B ± X , s = 13 T e V = 86.6 ± 0.5 ± 5.4 ± 3.4 μ b , where the first uncertainties are statistical, the second are systematic, and the third are due to the limited knowledge of the B ± → J / ψ K ± branching fraction. The ratio of the cross-section at 13 TeV to that at 7 TeV is determined to be 2.02 ± 0.02 (stat) ± 0.12 (syst). Differential cross-sections are also reported as functions of p T and y . All results are in agreement with theoretical calculations based on the state-of-art fixed next-to-leading order quantum chromodynamics.

• Publisher: Springer Berlin Heidelberg,Springer Nature B.V
• Subject: Classical and Quantum Gravitation / Collisions / Cross-sections / Elementary Particles / High energy physics / Mesons / Physics / Physics and Astronomy / Quantum chromodynamics / Quantum Field Theories / Quantum Field Theory / Quantum Physics / Quarks / Regular Article - Experimental Physics / Relativity Theory / Statistical analysis / Statistical methods / String Theory / Transverse momentum