Observation of a narrow mass state decaying into Υ(1S)+γ in pp̄ collisions at √s=1.96 TeV

Observation of a narrow mass state decaying into Υ(1S)+γ in pp̄ collisions at √s=1.96 TeV

Using data corresponding to an integrated luminosity of 1.3 fb⁻¹, we observe a narrow mass state decaying into Υ(1S)+γ, where the Υ(1S) meson is detected by its decay into a pair of oppositely charged muons, and the photon is identified through its conversion into an electron-positron pair. The sign...

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Veröffentlicht in:Physical review. D, Particles, fields, gravitation, and cosmology Particles, fields, gravitation, and cosmology, 2012-08, Vol.86 (3)
Hauptverfasser: Aoki, M., Augsten, K., Bandurin, D. V., Baringer, P., Bartlett, J. F., Bassler, U., Bernardi, G., Besançon, M., Bezzubov, V. A., Bhat, P. C., Boline, D., Brock, R., Bross, A., Buehler, M., Bunichev, V., Buszello, C. P., Castilla-Valdez, H., Chakrabarti, S., Chakraborty, D., Chan, K. M., Chandra, A., Chen, G., Chevalier-Théry, S., Cho, S. W., Choi, S., Clutter, J., Cooke, M., Corcoran, M., Demina, R., Diehl, H. T., Ding, P. F., Dubey, A., Duggan, D., Dyshkant, A., Ellison, J., Fox, H., Goussiou, A., Grannis, P. D., Grivaz, J.-F., Gutierrez, G., Harel, A., Heredia-De La Cruz, I., Hobbs, J. D., Iashvili, I., Ilchenko, Y., Johnson, E., Kehoe, R., Kermiche, S., Kozelov, A. V., Kraus, J., Lammers, S., Lee, W. M., Lellouch, J., Lincoln, D., Madar, R., Magaña-Villalba, R., Malik, S., Malyshev, V. L., Menezes, D., Merkin, M., Meyer, A., Meyer, J., Mondal, N. K., Mulhearn, M., Padilla, M., Parashar, N., Patwa, A., Penning, B., Perfilov, M., Peters, Y., Podstavkov, V. M., Price, D., Prokopenko, N., Ratoff, P. N., Royon, C., Salcido, P., Sanders, M. P., Schamberger, R. D., Scheglov, Y., Schlobohm, S., Schwanenberger, C., Severini, H., Slattery, P., Sonnenschein, L., Stoyanova, D. A., Tsai, Y.-T., Tuchming, B., Uvarov, L., Uvarov, S., Verdier, P., Vesterinen, M., Vilanova, D., Warchol, J., Watts, G., Weichert, J., Wilson, G. W., Yang, W.-C., Yatsunenko, Y. A., Zhao, T. G., Zhou, B.
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Sprache:eng
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Zusammenfassung:Using data corresponding to an integrated luminosity of 1.3 fb⁻¹, we observe a narrow mass state decaying into Υ(1S)+γ, where the Υ(1S) meson is detected by its decay into a pair of oppositely charged muons, and the photon is identified through its conversion into an electron-positron pair. The significance of this observation is 5.6 standard deviations. The mass of the state is centered at 10.551±0.014(stat)±0.017(syst) GeV/c², which is consistent with that of the state recently observed by the ATLAS Collaboration.
ISSN:1550-7998
1550-2368
DOI:10.1103/PhysRevD.86.031103