PRECISION TEST OF QED BY DIRECT COMPARISON OF E+E--]GAMMA-GAMMA AND E+E-]E+E-AT 29 GEV

Autor: Derrick, M, Gan, K, Kooijman, P, Loos, J, Musgrave, B, Price, L, Schlereth, J, Sugano, K, Weiss, J, Wood, D, Blockus, D, Brabson, B, Gray, S, Jung, C, Neal, H, Ogren, H, Rust, D, Valdatanappi, M, Akerlof, C, Bonvicini, G, Chapman, J, Errede, D, Harnew, N, Kesten, P, Meyer, D

The ratio of differential cross sections for the reactions e+e- → γγ and e+e- → e+e- is measured at s = 29 GeV in the central polar angle region, |cos θ| < 0.55, and compared to the same ratio calculated by QED to order α3. The ratio of these

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od______1064::7ea7b54bb47c5a31f8f5df9f47b6e119
https://ora.ox.ac.uk/objects/uuid:be61abf5-abcd-48d4-b73c-752dcb2f9eeb

Test beam performance of the electromagnetic calorimeter of the NOMAD experiment RID C-6672-2008

Autor: Autiero D, BaldoCeolin M, Bobisut F, Cattaneo PW, Camilleri L, Cavasinni V, Collazuol G, Conforto G, Conta C, Contalbrigo M, DelPrete T, DeSanto A, Ferrari R, Fraternali M, Gibin D, Gninenko SN, Graziani G, Guglielmi A, Iacopini E, Kovzelev AV, LaRotonda L, Lacaprara S, Lanza A, Laveder M, Lupi A, Martelli F, Mezzetto M, Pastore F, Pennacchio E, Petti R, Polesello G, Rimoldi A, Salvatore F, Sconza A, ValdataNappi M, Veltri M, Vercesi V, Volkov SA, ORESTANO, DOMIZIA

Test beam results of the NOMAD electromagnetic calorimeter are presented showing linearity, signal uniformity, energy and position resolution measured in an electron beam. Tests were also performed placing the calorimeter in a magnetic field of 0.4 T

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od______3668::5c9b86d391d64f63a96ab51a02d94f1c
https://hdl.handle.net/11590/124498

A Search For New Intermediate Vector Bosons and Excited Quarks Decaying To 2-jets At the Cern (p)over-bar-p Collider

Autor: ALITTI, J, AMBROSINI, G, ANSARI, R, AUTIERO, D, BAREYRE, P, BERTRAM, I, BLAYLOCK, G, BONAMY, P, BORER, K, BOURLIAUD, M, BUSKULIC, D, CARBONI, G, CAVALLI, D, CAVASINNI, V, CENCI, P, CHOLLET, J, CONTA, C, COSTA, G, COSTANTINI, F, COZZI, L, CRAVERO, A, CURATOLO, M, DELLACQUA, A, DELPRETE, T, DEWOLF, R, DILELLA, L, DUCROS, Y, EGAN, G, EINSWEILER, K, ESPOSITO, B, FAYARD, L, FEDERSPIEL, A, FERRARI, R, FRATERNALI, M, FROIDEVAUX, D, FUMAGALLI, G, GAILLARD, J, GIANOTTI, F, GILDEMEISTER, O, GOSSLING, C, GOGGI, V, GRUNENDAHL, S, HARA, K, HELLMAN, S, HRIVNAC, J, HUFNAGEL, H, HUGENTOBLER, E, HULTQVIST, K, IACOPINI, E, INCANDELA, J, JAKOBS, K, JENNI, P, KLUGE, E, KURZ, N, LAMI, S, LARICCIA, P, LEFEBVRE, M, LINSSEN, L, LIVAN, M, LUBRANO, P, MAGNEVILLE, C, MALGERI, L, MANDELLI, L, MAPELLI, L, MAZZANTI, M, MEIER, K, MERKEL, B, MEYER, J, MONIEZ, M, MONING, R, MORGANTI, M, MULLER, L, MUNDAY, D, NESSI, M, NESSITEDALDI, F, ONIONS, C, PAL, T, PARKER, M, PARROUR, G, PASTORE, F, PENNACCHIO, E, PENTNEY, J, PEPE, M, PERINI, L, PETRIDOU, C, PETROFF, P, PLOTHOWBESCH, H, POLESELLO, G, POPPLETON, A, PRETZL, K, PRIMAVERA, M, PUNTURO, M, REPELLIN, J, RIMOLDI, A, SACCHI, M, SCAMPOLI, P, SCHACHER, J, SCHMIDT, B, SIMAK, V, SINGH, S, SONDERMANN, V, SPIWOKS, R, STAPNES, S, TALAMONTI, C, TONDINI, F, TOVEY, S, TSESMELIS, E, UNAL, G, VALDATANAPPI, M, VERCESI, V, WEIDBERG, A, WELLS, P, WHITE, T, WOOD, D, WOTTON, S, ZACCONE, H, ZYLBERSTEJN, A

The two-jet invariant mass spectrum as measured in the UA2 experiment is used to search for additional heavy vector bosons decaying to two-jets. The mass of an additional W boson that couples to fermions with a V + A form is constrained to be greater

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::ffffd29042ce06e5980224a64b70c4de
http://hdl.handle.net/11588/472718

Direct Measurement of the W-gamma Coupling At the Cern Pbarp Collider

Autor: ALITTI, J, AMBROSINI, G, ANSARI, R, AUTIERO, D, BAREYRE, P, BERTRAM, I, BLAYLOCK, G, BONAMY, P, BORER, K, BOURLIAUD, M, BUSKULIC, D, CARBONI, G, CAVALLI, D, CAVASINNI, V, CENCI, P, CHOLLET, J, CONTA, C, COSTA, G, COSTANTINI, F, COZZI, L, CRAVERO, A, CURATOLO, M, DELLACQUA, A, DELPRETE, T, DEWOLF, R, DILELLA, L, DUCROS, Y, EGAN, G, EINSWEILER, K, ESPOSITO, B, FAYARD, L, FEDERSPIEL, A, FERRARI, R, FRATERNALI, M, FROIDEVAUX, D, FUMAGALLI, G, GAILLARD, J, GIANOTTI, F, GILDEMEISTER, O, GOSSLING, C, GOGGI, V, GRUNENDAHL, S, HARA, K, HELLMAN, S, HRIVNAC, J, HUFNAGEL, H, HUGENTOBLER, E, HULTQVIST, K, IACOPINI, E, INCANDELA, J, JAKOBS, K, JENNI, P, KLUGE, E, KURZ, N, LAMI, S, LARICCIA, P, LEFEBVRE, M, LINSSEN, L, LIVAN, M, LUBRANO, P, MAGNEVILLE, C, MANDELLI, L, MAPELLI, L, MAZZANTI, M, MEIER, K, MERKEL, B, MEYER, J, MONIEZ, M, MONING, R, MORGANTI, M, MULLER, L, MUNDAY, D, NESSI, M, NESSITEDALDI, F, ONIONS, C, PAL, T, PARKER, M, PARROUR, G, PASTORE, F, PENNACCHIO, E, PENTNEY, J, PEPE, M, PERINI, L, PETRIDOU, C, PETROFF, P, PLOTHOWBESCH, H, POLESELLO, G, POPPLETON, A, PRETZL, K, PRIMAVERA, M, PUNTURO, M, REPELLIN, J, RIMOLDI, A, SACCHI, M, SCAMPOLI, P, SCHACHER, J, SCHMIDT, B, SIMAK, V, SINGH, S, SONDERMANN, V, SPIWOKS, R, STAPNES, S, TALAMONTI, C, TONDINI, F, TOVEY, S, TSESMELIS, E, UNAL, G, VALDATANAPPI, M, VERCESI, V, WEIDBERG, A, WELLS, P, WHITE, T, WOOD, D, WOTTON, S, ZACCONE, H, ZYLBERSTEJN, A

The process ppBAR --> e-nu-gamma + X is studied as square-root s = 630 GeV. The observed signal is used to extract a direct measurement of the parameters-kappa and lambda which define the magnetic dipole and electric quadrupole moments of the W boson

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::17528dc66b0814bb494d443ae1ab36ba
http://hdl.handle.net/11588/472724

Experimental Limit On the Decay W+--]pi+-gamma At the Cern Pbarp Collider

Autor: Alitti, J, Ambrosini, G, Ansari, R, Autiero, D, Bareyre, P, Bertram, Ia, Blaylock, G, Bonamy, P, Borer, K, Bourliaud, M, Buskulic, D, Carboni, G, Cavalli, D, Cavasinni, Vincenzo, Cenci, P, Chollet, Jc, Conta, C, Costa, G, Costantini, Flavio, Cozzi, L, Cravero, A, Curatolo, M, Dellacqua, A, Delprete, T, Dewolf, Rs, Dilella, L, Ducros, Y, Egan, Gf, Einsweiler, Kf, Esposito, B, Fayard, L, Federspiel, A, Ferrari, R, Fraternali, M, Froidevaux, D, Fumagalli, G, Gaillard, Jm, Gianotti, F, Gildemeister, O, Gossling, C, Goggi, Vg, Grunendahl, S, Hara, K, Hellman, S, Hrivnac, J, Hufnagel, H, Hugentobler, E, Hultqvist, K, Iacopini, E, Incandela, J, Jakobs, K, Jenni, P, Kluge, Ee, Kurz, N, Lami, S, Lariccia, P, Lefebvre, M, Linssen, L, Livan, M, Lubrano, P, Magneville, C, Mandelli, L, Mapelli, L, Mazzanti, M, Meier, K, Merkel, B, Meyer, Jp, Moniez, M, Moning, R, Morganti, M, Muller, L, Munday, Dj, Nessi, M, Nessitedaldi, F, Onions, C, Pal, T, Parker, Ma, Parrour, G, Pastore, F, Pennacchio, E, Pentney, Jm, Pepe, M, Perini, L, Petridou, C, Petroff, P, Plothowbesch, H, Polesello, G, Poppleton, A, Pretzl, K, Primavera, M, Punturo, M, Repellin, Jp, Rimoldi, A, Sacchi, M, Scampoli, P, Schacher, J, Schmidt, B, Simak, V, Singh, Sl, Sondermann, V, Spiwoks, R, Stapnes, S, Talamonti, C, Tondini, F, Tovey, Sn, Tsesmelis, E, Unal, G, Valdatanappi, M, Vercesi, V, Weidberg, Ar, Wells, Ps, White, To, Wood, Dr, Wotton, Sa, Zaccone, H, Zylberstejn, A.

Results are given on a search for the decay W+/- --> pi+/--gamma with the UA2 detector in ppBAR collisions at square-root s = 630 GeV. No signal for such a process is observed and upper limits on the ratio R = GAMMA(W+/- --> pi+/--gamma)/GAMMA(W+/- -

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::6ce2457e91993a4e2ab1a6d953ac43ad
http://hdl.handle.net/11588/472725