This letter reports the results of the measurement of single photon production in the reaction e(+)e(-) --> gamma+ invisible particles at centre-of-mass energies root s = 130 and 136 GeV and an integrated luminosity of 5.83 pb(-1), collected with the DELPHI detector at LEP. The signal is compatible with the prediction of the Standard Model for the process e(+)e(-) --> nu<(nu)over bar>gamma, and the number of neutrino families has been determined to be N-nu = 3.1 +/- 0.6. Limits have been derived on anomalous neutral gauge boson couplings and on compositeness in the framework of a specific model.
Search for anomalous production of single photons at root s=130 and 136 GeV / Delphi, C., Abreu, P., Adam, W., Canale, V.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 380:(1996), pp. 471-479. [10.1016/0370-2693(96)00671-5]
Search for anomalous production of single photons at root s=130 and 136 GeV
CANALE, VINCENZO
1996
Abstract
This letter reports the results of the measurement of single photon production in the reaction e(+)e(-) --> gamma+ invisible particles at centre-of-mass energies root s = 130 and 136 GeV and an integrated luminosity of 5.83 pb(-1), collected with the DELPHI detector at LEP. The signal is compatible with the prediction of the Standard Model for the process e(+)e(-) --> nu<(nu)over bar>gamma, and the number of neutrino families has been determined to be N-nu = 3.1 +/- 0.6. Limits have been derived on anomalous neutral gauge boson couplings and on compositeness in the framework of a specific model.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
