Angular analysis of the decay B + → K + μ + μ − in proton-proton collisions at s = 8     TeV

• Published in: Physical review. D 2018-12, Vol.98 (11), Article 112011
• Main Authors: Waltenberger, W., Flouris, G., Beghin, D., Grebenyuk, A., Vermassen, B., Giammanco, A., Sanchez Rosas, L. J., Kolosova, M., Mohammed, Y., Abdulsalam, A., Amendola, C., Jansová, M., El Mamouni, H., Sordini, V., Lipinski, M., Albert, A., Knutzen, S., Merschmeyer, M., Centis Vignali, M., Dreyer, T., Stober, F. M., Katkov, I., Papadopoulos, I., Swain, S. K., Kumar, R., Sharma, R., Kumar, V., Fiore, L., Zito, G., Codispoti, G., Perrotta, A., Ciulli, V., Tosi, S., Buontempo, S., Tenchini, R., Venturi, A., Argiro, S., Solano, A., Sekmen, S., Almond, J., Lopez-Fernandez, R., Sanchez-Hernandez, A., Krofcheck, D., Waqas, M., Byszuk, A., Korenkov, V., Fouz, M. C., de Trocóniz, J. F., Palencia Cortezon, E., Cucciati, G., Dabrowski, A., Lecoq, P., Malgeri, L., Pantaleo, F., Seidel, M., Marionneau, M., Schönenberger, M., Zhu, D. H., Robmann, P., Chang, P., Kumar, Arun, Dolek, F., Tali, B., Cakir, A., Coughlan, J. A., Womersley, W. J., Della Negra, M., Lyons, L., Cole, J. E., Teodorescu, L., Narain, M., Syarif, R., Usai, E., Bachtis, M., Long, O. R., Weinberg, M., Jensen, F., Mei, H., Colafranceschi, S., Rahmani, M., Roy, T., Apanasevich, L., Wu, Z., Alhusseini, M., Bilki, B., Penzo, A., Hu, M., Zhaozhong, S., Iashvili, I., Hortiangtham, A., Wood, D., Trovato, M., Musienko, Y., Woodard, A., Kalogeropoulos, A., Parashar, N., Sturdy, J., Buchanan, J., Klabbers, P., Smith, W. H.
• Format: Article
• Language: English
• Subjects: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
• ISSN: 2470-0010; 2470-0029
• DOI: 10.1103/PhysRevD.98.112011

The angular distribution of the flavor-changing neutral current decay B$^+$$\to$ K$^+\mu^+\mu^-$ is studied in proton-proton collisions at a center-of-mass energy of 8 TeV. The analysis is based on data collected with the CMS detector at the LHC, corresponding to an integrated luminosity of 20.5 fb$^{-1}$. The forward-backward asymmetry $A_{\mathrm{FB}}$ of the dimuon system and the contribution $F_{\mathrm{H}}$ from the pseudoscalar, scalar, and tensor amplitudes to the decay width are measured as a function of the dimuon mass squared. Furthermore, the measurements are consistent with the standard model expectations.