A study of radiative muon-pair events at Z0 energies and limits on an additional Z′ gauge beson

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Μονάδα:
Ερευνητικό υλικό ΕΚΠΑ
Τίτλος:
A study of radiative muon-pair events at Z0 energies and limits on an additional Z′ gauge beson
Γλώσσες Τεκμηρίου:
Αγγλικά
Περίληψη:
An analysis is reported on the channel e+e-→μ+μ- (nγ), n=1,2..., using data taken with the DELPHI detector at LEP from 1990 to 1992. Differential cross sections of the radiative photons as a function of photon energy and of the angle between the photon and the muon are presented. No significant deviations from expectations are observed. The data are also used to extract the muon-pair cross section and asymmetry below the Z0 peak by using those events with relatively hard initial state radiative photon(s). The measured cross section and asymmetry show no significant deviation from the Standard Model expectations. These results together with the DELPHI cross section and asymmetry measurements at the LEP energies from the 1990 to 1992 running periods are used to determine limits on the Z0-Z′ gauge boson mixing angle θZ′ and on the Z′ mass. There is no indication of the existence of a Z′; the limits obtained on the mixing angle substantially improve upon existing limits. The 95% confidence level allowed ranges of θZ′ in various models are: {Mathematical expression} © 1995 Springer-Verlag.
Έτος δημοσίευσης:
1995
Συγγραφείς:
Abreu, P.
Adam, W.
Adye, T.
Agasi, E.
Ajinenko, I.
Aleksan, R.
Alekseev, G.D.
Allport, P.P.
Almehed, S.
Almeida, F.M.L.
Alvsvaag, S.J.
Amaldi, U.
Andreazza, A.
Antilogus, P.
Apel, W.-D.
Apsimon, R.J.
Arnoud, Y.
Asman, B.
Augustin, J.-E.
Augustinus, A.
Baillon, P.
Bambade, P.
Barao, F.
Barate, R.
Bardin, D.Y.
Barker, G.J.
Baroncelli, A.
Barring, O.
Barrio, J.A.
Bartl, W.
Bates, M.J.
Battaglia, M.
Baubillier, M.
Baudot, J.
Becks, K.-H.
Begalli, M.
Beilliere, P.
Beltran, P.
Benvenuti, A.C.
Berggren, M.
Bertrand, D.
Bianchi, F.
Bigi, M.
Bilenky, M.S.
Billoir, P.
Bjarne, J.
Bloch, D.
Blocki, J.
Blyth, S.
Bocci, V.
Bogolubov, P.N.
Bolognese, T.
Bonesini, M.
Bonivento, W.
Booth, P.S.L.
Borisov, G.
Bosio, C.
Bostjancic, B.
Bosworth, S.
Botner, O.
Boudinov, E.
Bouquet, B.
Bourdarios, C.
Bowcock, T.J.V.
Bozzo, M.
Braibant, S.
Branchini, P.
Brand, K.D.
Brenner, R.A.
Briand, H.
Bricman, C.
Brillault, L.
Brown, R.C.A.
Brunet, J.-M.
Bugge, L.
Buran, T.
Buys, A.
Buytaert, J.A.M.A.
Caccia, M.
Calvi, M.
Camacho Rozas, A.J.
Campion, R.
Camporesi, T.
Capale, V.
Cankocak, K.
Cao, F.
Carena, F.
Carrilho, P.
Carroll, L.
Cases, R.
Caso, C.
Castillo Gimenez, M.V.
Cattai, A.
Cavallo, F.R.
Cerrito, L.
Chabaud, V.
Chan, A.
Chapkin, M.
Charpentier, Ph.
Chaussard, L.
Chauveau, J.
Checchia, P.
Chelkov, G.A.
Chliapnikov, P.
Chorowicz, V.
Chrin, J.T.M.
Cindro, V.
Collins, P.
Contreras, J.L.
Contri, R.
Cortina, E.
Cosme, G.
Cosmo, G.
Cossutti, C.
Couchot, F.
Crawley, H.B.
Crennell, D.
Crosetti, G.
Cuevas Maestro, J.
Czellar, S.
Dahl-Jensen, E.
Dahm, J.
Dalmagne, B.
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Damgaard, G.
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Daum, A.
Dauncey, P.D.
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Firestone, A.
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Gomez Y Cadenas, J.J.
Gopal, G.
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Haedinger, U.
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Hallgren, A.
Hamacher, K.
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Hedberg, V.
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Hernando, J.A.
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Herr, H.
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Hill, T.S.
Holmgren, S.-O.
Holt, P.J.
Holthuizen, D.
Honore, P.F.
Houlden, M.
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Jacobsson, R.
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Jean-Marie, B.
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Khovanski, N.N.
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Kjaer, N.J.
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Loerstad, B.
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Lopez Aguera, M.A.
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Marechal, B.
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Woschnagg, K.
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Zach, F.
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Zalewska, A.
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Zavrtanik, D.
Zevgolatakos, E.
Zimin, N.I.
Zito, M.
Zontar, D.
Zuberi, R.
Zumerle, G.
Περιοδικό:
ZEITSCHRIFT FUR PHYSIK. SECTION C, PARTICLES AND FIELDS
Τόμος:
65
Αριθμός / τεύχος:
4
Σελίδες:
603-618
Επίσημο URL (Εκδότης):
DOI:
10.1007/BF01578669
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