Z-boson production with two unobserved, back-to-back, hard photons at LEP

Z-boson production with two unobserved, back-to-back, hard photons at LEP

The double-radiative process e+e−→Zγγ→qq¯γγ where the two hard photons escape detection at low polar angles into opposite directions, is studied in 0.62 fb−1 of data collected with the L3 detector at LEP at centre-of-mass energies between 188.6 and 209.2 GeV. The cross sections are measured and foun...

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Veröffentlicht in:Physics letters. B 2005-05, Vol.613 (3-4), p.118-127
Hauptverfasser: Arefiev, A., Bagnaia, P., Banerjee, S., Banerjee, Sw, Bertucci, B., Betev, B.L., Biland, A., Blaising, J.J., Böhm, A., Branson, J.G., Burger, W.J., Capell, M., Cartacci, A., Cavallari, F., Cavallo, N., Chemarin, M., Chen, A., Chen, G.M., Chen, H.S., Cifarelli, L., Debreczeni, J., DeNotaristefani, F., Dova, M.T., Extermann, P., Felcini, M., Filthaut, F., Fisher, W., Freudenreich, K., Ganguli, S.N., Garcia-Abia, P., Giagu, S., Gurtu, A., Gutay, L.J., Haas, D., Hatzifotiadou, D., Hervé, A., Hofer, H., Hou, S.R., Jin, B.N., Jones, L.W., Josa-Mutuberría, I., Kirkby, J., Kittel, W., König, A.C., Koutsenko, V., Lecomte, P., Le Coultre, P., Le Goff, J.M., Levtchenko, P., Liu, Z.A., Lohmann, W., Lu, Y.S., Ma, W.G., Malgeri, L., Martin, J.P., Matyja, A., McNeil, R.R., Mele, S., Mohanty, G.B., Musicar, B., Musy, M., Nisati, A., Novak, T., Paolucci, P., Paramatti, R., Patricelli, S., Paul, T., Pensotti, S., Pistolesi, E., Plyaskin, V., Pohl, M., Ramelli, R., Ren, D., Roe, B.P., Romero, L., Ruggiero, G., Rykaczewski, H., Salicio, J., Servoli, L., Shivarov, N., Shvorob, A., Sudhakar, K., Szillasi, Z., Tang, X.W., Ting, Samuel C.C., Ting, S.M., Tully, C., Van de Walle, R.T., Vesztergombi, G., Wadhwa, M., Wang, Q., Xu, Z.Z., Yamamoto, J., Yeh, S.C., Zalite, An, Zhang, Z.P., Zhao, J., Zhu, R.Y., Zichichi, A., Zöller, M.
Format: Artikel
Sprache:eng
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Exact sciences and technology
High Energy Physics - Experiment
Nuclear physics
Physics
The physics of elementary particles and fields
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Zusammenfassung:The double-radiative process e+e−→Zγγ→qq¯γγ where the two hard photons escape detection at low polar angles into opposite directions, is studied in 0.62 fb−1 of data collected with the L3 detector at LEP at centre-of-mass energies between 188.6 and 209.2 GeV. The cross sections are measured and found to be consistent with the Standard Model expectations.
ISSN:0370-2693
1873-2445
DOI:10.1016/j.physletb.2005.03.039