2026
preprint
Measurement of di-muons from 400 GeV/c protons interacting in a thick molybdenum/tungsten target
A. Aksoy, R. Albanese, K. Albrecht, F. Alessio, A. Alexandrov, A. Alikhanov, F. Aloschi, A. Anokhina, T. Arndt, D. Arutinov, A. Ballarino, L. Baudin, V. Bautin, A. Bay, I. Bekman, C. Betancourt, I. Bezshyiko, O. Bezshyyko, D. Bick, M. Birch, A. Pereiro Castro, M. Bogomilov, P. Borges De Sousa, K. Bondarenko, W.M. Bonivento, M. Borisyak, N. Bourcey, T. J. V. Bowcock, A. Boyarsky, D. Breton, A. Brignoli, L. Brombach, V. Buscher, S. Buontempo, C.S. Caillot, M. Campanelli, D. Centanni, A. Cervelli, S. Charity, K.-Y. Choi, D. Chokheli, A. Chukanov, M. Climescu, M. Cristinziani, G.M. Dallavalle, M. Dam, N. D'Ambrosio, D. Davino, R. de Asmundis, P. de Bryas, J. De Carvalho Saraiva, G. De Lellis, M. de Magistris, A. De Roeck, M. De Serio, G. Del Giudice, P. Deucher, A. Devred, A. Di Crescenzo, C. Di Cristo, H. Dijkstra, D. Dobur, D. Duarte Ramos, T. Enik, O. Fecarotta, F. Fedotov, T. Ferber, M. Ferrillo, M. Ferro-Luzzi, A. Fiorillo, H. Fischer, R. Fresa, G. Frisella, S.J. Fuenzalida Garrido, T. Fukuda, G. Galati, E. Gamberini, K. Genovese, B. Goddard, L. Golinka-Bezshyyko, A. Golutvin, A. Gonnin, D. Gorbunov, E. Graverini, A.M. Guler, V. Guliaeva, G.J. Haefeli, C. Hagner, J.C. Helo Herrera, M.J. Henriquez Zerene, E. van Herwijnen, A. Hollnagel, C. Issever, S. Izquierdo Bermudez, A. Iuliano, R. Jacobsson, D. Jokovic, C. Kamiscioglu, V. Kholoimov, S.H. Kim, Y.G. Kim, V. Koch, K. Kodama, T. Koettig, D.I. Kolev, L. Kolupaeva, M. Komatsu, V. Kostyukhin, I. Krasilnikova, A. Krolla, K. Kuznetsova, S. Kuleshov, H.M. Lacker, M. Lamont, O. Lantwin, A. Lauria, K.Y. Lee, W.C. Lee, N. Leonardo, V.P. Loschiavo, I. Lomidze, F. Lyons, J. Maalmi, A.M. Magnan, F.J. Mangiarotti, J.P. Marquez Hernandez, S.N. Medina Figueroa, G.H. Mendizabal, A. Miano, S. Mikado, A. Mikulenko, A. Milanese, J.A. Molins i. Bertram, T.A. Molzberger, M.C. Montesi, K. Morishima, A.S. Muller, Y. Mukhamejanov, N. Naganawa, T. Nakano, S.L. Ochoa Guaman, S. Ogawa, D.I. Olmos Patino, O. Olshevskiy, M. Ovchynnikov, P. Owen, A. Palavandishvili, U. Parzefall, A. Pastore, M. Patel, K. Petridis, O. Pirotte, N. Polukhina, L.F. Prates Cattelan, J.D. Price, S.R. Qasim, A. Quercia, A. Rademakers, F. Ratnikov, F. Redi, A. Reghunath, D. Riester, S. Ritter, T.J. Rock, E. Rodrigues, H. Rokujo, O. Ruchayskiy, T. Ruf, O.M. Ruud, A. Saba, S. Sakhiyev, K. Salamatin, O. Samoylov, P. Santos Diaz, O. Sato, F. Savary, C. Scharf, W. Schmidt-Parzefall, E. Schopf, M. Schumann, P. Schupp, N. Serra, M. Shaposhnikov, T. Schedrina, L. Shchutska, H. Shibuya, A. Sidoti, C. Silano, S. Simone, K. Skovpen, M. Smith, G. Soares, J.Y. Sohn, O. Soto Sandoval, F. Steeg, O. Steinkamp, W. Sutcliffe, H. Tilquin, I. Timiryasov, C. Touramanis Douramanis, D. Treille, Z. Tsamalaidze, N. Tsverava, P. Ulloa Poblete, E. Ursov, A. Ustyuzhanin, G. Vasquez, L.A Viera Lopes, S. Vilchinskii, C. Visone, S. van Waasen, R. Wanke, J.M. Webb, C. Weiser, J. Wenk, I.M. Wostheinrich, M. Wurm, S. Yamamoto, D. Yilmaz, SM Yoo, C.S. Yoon, A. Zaitsev, J. Zamora Saa, T. Zholdybayev
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Le résumé fourni par la source
Di-muon events emanating from a replica of the SHiP target at the CERN SPS contain a clear signal of $J/ \psi$ production. The production rate is in reasonable agreement with Monte Carlo based on Pythia v8. For the interval in rapidity defined in the center of mass, $y_{cm}$, with the largest overlap with the NA50 measurement, $0.3 < y_{cm} < 0.6$, we obtain the production cross section per nucleon $\sigma J/ \psi /A$ including the branching ratios of $J/ \psi $ decays into muons, $B_{\mu^+\mu^-}$: $B_{\mu^+\mu^-}\sigma(J/ \psi )/A=(1.18~\pm~0.04~\pm~0.10)~\mathrm{nb}$/nucleon. This is to be compared to the NA50 extrapolated result (using a much thinner target): $B_{\mu^+\mu^-}\sigma(J/ \psi )/A=(0.99~\pm~0.04)~\mathrm{nb}$/nucleon. Within the systematic errors, no significant enhancement due to secondary production of $J/ \psi$ inside the target is observed. An upper limit of possible contributions from cascade collisions of $<32\%$ is obtained.
Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.
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Les sujets associés
Particle physics theoretical and experimental studiesHigh-Energy Particle Collisions ResearchParticle Detector Development and Performance