Search for R-parity violating production of single sneutrinos in e(+)e(-) collisions at root s=189-209 GeV

Heister, A; Schael, S; Barate, R; Bruneliere, R; De Bonis, I; Decamp, D; Goy, C; Jezequel, S; Lees, Jp; Martin, F; Merle, E; Minard, Mn; Pietrzyk, B; Trocme, B; Boix, G; Bravo, S; Casado, Mp; Chmeissani, M; Crespo, Jm; Fernandez, E; Fernandez Bosman, M; Garrido, L; Grauges, E; Lopez, J; Martinez, M; Merino, G; Miquel, R; Mir, Lm; Pacheco, A; Paneque, D; Ruiz, H; Colaleo, A; Creanza, D; De Filippis, N; de Palma, M; Iaselli, G; Maggi, G; Maggi, M; Nuzzo, S; Ranieri, A; Raso, G; Ruggieri, F; Selvaggi, G; Silvestris, L; Tempesta, P; Tricomi, A; Zito, G; Huang, X; Lin, J; Ouyang, Q; Wang, T; Xie, Y; Xu, R; Xue, S; Zhang, J; Zhang, L; Zhao, W; Abbaneo, D; Azzurri, P; Barklow, T; Buchmuller, O; Cattaneo, M; Cerutti, F; Clerbaux, B; Drevermann, H; Forty, Rw; Frank, M; Gianotti, F; Greening, Tc; Hansen, Jb; Harvey, J; Hutchcroft, De; Janot, P; Jost, B; Kado, M; Maley, P; Mato, P; Moutoussi, A; Ranjard, F; Rolandi, L; Schlatter, D; Sguazzoni, G; Tejessy, W; Teubert, F; Valassi, A; Videau, I; Ward, Jj; Badaud, F; Dessagne, S; Falvard, A; Fayolle, D; Gay, P; Jousset, J; Michel, B; Monteil, S; Pallin, D; Pascolo, Jm; Perret, P; Hansen, Jd; Hansen, Jr; Hansen, Ph; Nilsson, Bs; Waananen, A; Kyriakis, A; Markou, C; Simopoulou, E; Vayaki, A; Zachariadou, K; Blondel, A; Brient, Jc; Machefert, F; Rouge, A; Swynghedauw, M; Tanaka, R; Videau, H; Ciulli, V; Focardi, E; Parrini, G; Antonelli, A; Antonelli, M; Bencivenni, G; Bologna, G; Bossi, F; Campana, P; Capon, G; Chiarella, V; Laurelli, P; Mannocchi, G; Murtas, F; Murtas, Gp; Passalacqua, L; Pepe Altarelli, M; Spagnolo, P; Kennedy, J; Lynch, Jg; Negus, P; O'Shea, V; Smith, D; Thompson, As; Wasserbaech, S; Cavanaugh, R; Dhamotharan, S; Geweniger, C; Hanke, P; Hepp, V; Kluge, Ee; Leibenguth, G; Putzer, A; Stenzel, H; Tittel, K; Werner, S; Wunsch, M; Beuselinck, R; Binnie, Dm; Cameron, W; Davies, G; Dornan, Pj; Girone, M; Hill, Rd; Marinelli, N; Nowell, J; Przysiezniak, H; Rutherford, Sa; Sedgbeer, Jk; Thompson, Jc; White, R; Chete, Vm; Girtler, P; Kneringer, E; Kuhn, D; Rudolph, G; Bouhova Thacker, E; Bowdery, Ck; Clarke, Dp; Ellis, G; Finch, Aj; Foster, F; Hughes, G; Jones, Rwl; Pearson, Mr; Robertson, Na; Smizanska, M; Lemaitre, V; Blumenschein, U; Holldorfer, F; Jakobs, K; Kayser, F; Kleinknecgt, K; Muller, As; Quast, G; Renk, B; Sander, Hg; Schmeling, S; Wachsmuth, H; Zeitnitz, C; Ziegler, T; Bonissent, A; Carr, J; Coyle, P; Curtil, C; Ealet, A; Fouchez, D; Leroy, O; Kachelhoffer, T; Payre, P; Rousseau, D; Tilquin, A; Ragusa, F; David, A; Dietl, H; Ganis, G; Huttmann, K; Lutjens, G; Mannert, C; Manner, W; Moser, Hg; Settles, R; Wolf, G; Boucrot, J; Callot, O; Davier, M; Duflot, L; Grivaz, Jf; Heusse, P; Jacholkowska, A; Loomis, C; Serin, L; Veillet, Jj; de Vivie de Regie JB,; Yuan, C; Bagliesi, G; Boccali, T; Foa, L; Giammanco, A; Giassi, A; Ligabue, F; Messineo, ALBERTO MARIA; Palla, F; Sanguinetti, G; Sciaba, A; Tenchini, R; Venturi, A; Verdini, Pg; Awunor, O; Blair, Ga; Coles, J; Cowan, G; Garcia Bellido, A; Green, Mg; Jones, Lt; Medcalf, T; Misiejuk, A; Strong, Ja; Teixeira Dias, P; Clifft, Rw; Edgecock, Tr; Norton, Pr; Tomalin, Ir; Bloch Devaux, B; Boumediene, D; Colas, P; Fabbro, B; Lancon, E; Lemaire, Mc; Locci, E; Perez, P; Rander, J; Renardy, Jf; Rosowsky, A; Seager, P; Trabelsi, A; Tuchming, B; Vallage, B; Konstantinidis, N; Litke, Am; Taylor, G; Booth, Cn; Cartwright, S; Combley, F; Hodgson, Pn; Lehto, M; Thompson, Lf; Affholderbach, K; Bohrer, A; Brandt, S; Grupen, C; Hess, J; Ngac, A; Prange, G; Sieler, U; Borean, C; Giannini, G; He, H; Putz, J; Rothberg, J; Armstrong, Sr; Berkelman, K; Cranmer, K; Ferguson, Dps; Gao, Y; Gonzalez, S; Hayes, Oj; Hu, H; Jin, S; Kile, J; Mcnamara, Pa; Nielsen, J; Pan, Yb; von Wimmersperg Toeller JH,; Wiedenmann, W; Wu, J; Wu, Sl; Wu, X; Zobernig, G; Dissertori, G.

doi:10.1007/s10052-002-1010-2

A search for single sneutrino production under the assumption that R-parity is violated via a single dominant LL (E) over bar coupling is presented. This search considers the process egamma --> (nu) over tildel and is performed using the data collected by the ALEPH detector at centre-of-mass energies from 189 GeV up to 209 GeV corresponding to an integrated luminosity of 637.1 pb(-1). The numbers of observed candidate events are in agreement with Standard Model expectations and 95% confidence level upper limits on five of the LLP couplings are given as a function of the assumed sneutrino mass.