Analysis of $\it{\Lambda}^\mathrm{0}_b \rightarrow pK^-\mu^+\mu^-$ decays

• Main Authors: Albrecht, J, Amey, J. L, Anderlini, L, Ao, D, Da Silva, R. Ataíde, Bachmann, S, Barlow, R. J, Basels, J. M, Belous, K, Belyaev, I, Blake, T, Bolzonella, R, Bovill, M, Buonaura, A, Burr, C, Carniti, P, Cholak, S, Chulikov, V, Colombo, T, Contu, A, Cooke, N, Rivera, E. Curras, Dai, X, Daniel, J, De Benedetti, F, De Paula, L, Delaney, B, Deschamps, O, Dettori, F, Duras, M. M, Dziurda, A, Dzyuba, A, Evans, T, Forty, R, Foulds-Holt, D, Gaspar, C, Girardey, L, Giugliano, C, Gys, T, Hammerich, J, Hansmann-Menzemer, S, Hennessy, K, Henry, L, Howarth, N, Jage, H, Jans, E, Juszczak, I, Karacson, M, Karpenkov, D, Ketel, T, Koppenburg, P, Kotriakhova, S, Loi, A, Lu, Q, Luppi, E, Maccolini, S, Mack, B, Manca, G, Manuzzi, D, Merli, A, Miralles, T, Moise, R. D, Morris, A. B, Padeken, K. O, Pagare, B, Pais, P. R, Pajero, T, Palutan, M, Papanestis, A, Pappenheimer, C, Castro, A. Pereiro, Petrolini, A, Piccolo, L, Ponce, S, Qian, Q. Q, De Oliveira, V. Ramos, Richardson-Slipper, M, Rodrigues, E, Rolf, D. L, Lamas, M. Romero, Vidal, J. Ruiz, Silva, J. J. Saborido, Sagidova, N, Santacesaria, R, Sarpis, G, Satriano, C, Schmitz, H, Schune, M. H, Simone, S, De Paula, B. Souza, Speer, J. G, Su, Y, Terentev, A, Tobin, M, Valenti, G, Vincent, P, Wagner, J, Yang, K, Yang, X, Zeng, C
• Format: Journal Article
• Language: English
• Published: 19.09.2024
• Subjects: Physics - High Energy Physics - Experiment
• DOI: 10.48550/arxiv.2409.12629

The differential branching fraction and angular coefficients of \ensuremath{\it{\Lambda}^\mathrm{0}_b \rightarrow pK^-\mu^+\mu^-}\xspace decays are measured in bins of the dimuon mass squared and dihadron mass. The analysis is performed using a data set corresponding to 9$\aunit{fb}^{-1}$ of integrated luminosity collected with the $\mbox{LHCb}$ detector between 2011 and 2018. The data are consistent with receiving contributions from a mixture of $\it{\Lambda}$ resonances with different spin-parity quantum numbers. The angular coefficients show a pattern of vector--axial vector interference that is a characteristic of the type of flavour-changing neutral-current transition relevant for these decays.