Light vector meson production in pp collisions at s=7 TeV

• Published in: Physics letters. B Vol. 710; no. 4-5; pp. 557 - 568
• Main Authors: Adamová, D., Aleksandrov, D., Alfaro Molina, R., Antonioli, P., Baral, R.C., Bastid, N., Belikov, I., Berceanu, I., Bhati, A.K., Boccioli, M., Bogolyubsky, M., Bortolin, C., Breitner, T., Budnikov, D., Caffarri, D., Caines, H., Cifarelli, L., Contreras, J.G., Cortese, P., Dalsgaard, H.H., De, S., D Erasmo, G., Di Nezza, P., Estienne, M., Esumi, S., Filchagin, S., Fionda, F.M., Fragiacomo, E., Gerhard, J., Gladysz-Dziadus, E., González-Zamora, P., Grinyov, B., Guber, F., Hetland, K.F., Jachołkowski, A., Jena, S., Karavicheva, T., Khan, M.M., Khanzadeev, A., Kim, M., Koch, K., Kondratyeva, N., Kwon, Y., Le Bornec, Y., Li, X., Loizides, C., Maevskaya, A., Mahapatra, D.P., Malinina, L., Mangotra, L., Margotti, A., Martashvili, I., Martynov, Y., Menchaca-Rocha, A., Monteno, M., Montes, E., Nazarenko, S., Nilsen, B.S., Nilsson, M.S., Oppedisano, C., Oskarsson, A., Painke, F., Pal, S.K., Passfeld, A., Petrov, P., Piano, S., Pillot, P., Pinsky, L., Piyarathna, D.B., Pluta, J., Pochybova, S., Räihä, T.S., Rak, J., Raniwala, S., Redlich, K., Reolon, A.R., Rossi, A., Rubio Montero, A.J., Sadovsky, S., Salgado, C.A., Sambyal, S., Schicker, R., Schweda, K., Sicking, E., Simonetti, G., Soltz, R., Soos, C., Stolpovskiy, M., Strabykin, K., Sukhorukov, M., Szarka, I., van der Kolk, N., Vande Vyvre, P., Varma, R., Veldhoen, M., Venaruzzo, M., Viyogi, Y.P., Voloshin, S., Yasnopolskiy, S., Zach, C.
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier B.V 20.04.2012; Elsevier
• Subjects: Exact sciences and technology; Nuclear physics; Physics; The physics of elementary particles and fields; Meson production; Charmed mesons; Differential cross sections; Vector mesons; Models; Resonance; Cross sections; Mass spectra; Leptonic decays; Muons
• ISSN: 0370-2693; 1873-2445
• DOI: 10.1016/j.physletb.2012.03.038

The ALICE experiment has measured low-mass dimuon production in pp collisions at s=7 TeV in the dimuon rapidity region 2.5<y<4. The observed dimuon mass spectrum is described as a superposition of resonance decays (η,ρ,ω,η′,ϕ) into muons and semi-leptonic decays of charmed mesons. The measured production cross sections for ω and ϕ are σω(1<pt<5 GeV/c,2.5<y<4)=5.28±0.54(stat)±0.49(syst) mb and σϕ(1<pt<5 GeV/c,2.5<y<4)=0.940±0.084(stat)±0.076(syst) mb. The differential cross sections d2σ/dydpt are extracted as a function of pt for ω and ϕ. The ratio between the ρ and ω cross section is obtained. Results for the ϕ are compared with other measurements at the same energy and with predictions by models.