Search for light gravitinos in events with photons and missing transverse momentum at HERA

Aktas, A; Andreev, V; Anthonis, T; Asmone, A; Babaev, A; Backovic, S; Bahr, J; Baranov, P; Barrelet, E; Bartel, W; Baumgartner, S; Becker, J; Beckingham, M; Behnke, O; Behrendt, O; Belousov, A; Berger, Ch; Berger, N; Berndt, T; Bizot, JC; Bohme, J; Boenig, M-O; Boudry, V; Bracinik, J; Brisson, V; Broker, H-B; Brown, DP; Bruncko, D; Busser, FW; Bunyatyan, A; Buschhorn, G; Bystritskaya, L; Campbell, AJ; Caron, S; Cassol-Brunner, F; Cerny, K; Chekelian, V; Contreras, JG; Coppens, YR; Coughlan, JA; Cox, BE; Cozzika, G; Cvach, J; Dainton, JB; Dau, WD; Daum, K; Delcourt, B; Demirchyan, R; De Roeck, A; Desch, K; De Wolf, EA; Diaconu, C; Dingfelder, J; Dodonov, V; Dubak, A; Duprel, C; Eckerlin, G; Efremenko, V; Egli, S; Eichler, R; Eisele, F; Ellerbrock, M; Elsen, E; Erdmann, W; Faulkner, PJW; Favart, L; Fedotov, A; Felst, R; Ferencei, J; Fleischer, M; Fleischmann, P; Fleming, YH; Flucke, G; Flugge, G; Fomenko, A; Foresti, I; Formanek, J; Franke, G; Frising, G; Gabathuler, E; Gabathuler, K; Garutti, E; Garvey, J; Gayler, J; Gerhards, R; Gerlich, C; Ghazaryan, S; Ginzburgskaya, S; Goerlich, L; Gogitidze, N; Gorbounov, S; Grab, C; Grassler, H; Greenshaw, T; Gregori, M; Grindhammer, G; Gwilliam, C; Haidt, D; Hajduk, L; Haller, J; Hansson, M; Heinzelmann, G; Henderson, RCW; Henschel, H; Henshaw, O; Herrera, G; Herynek, I; Heuer, R-D; Hildebrandt, M; Hiller, KH; Hoting, P; Hoffmann, D; Horisberger, R; Hovhannisyan, A; Ibbotson, M; Ismail, M; Jacquet, M; Janauschek, L; Janssen, X; Jemanov, V; Jonsson, L; Johnson, DP; Jung, H; Kant, D; Kapichine, M; Karlsson, M; Katzy, J; Keller, N; Kenyon, IR; Kiesling, C; Klein, M; Kleinwort, C; Klimkovich, T; Kluge, T; Knies, G; Knutsson, A; Koblitz, B; Korbel, V; Kostka, P; Koutouev, R; Kropivnitskaya, A; Kroseberg, J; Kruger, K; Kuckens, J; Landon, MPJ; Lange, W; Lastovicka, T; Laycock, P; Lebedev, A; Leissner, B; Lemrani, R; Lendermann, V; Levonian, S; Lindfeld, L; Lipka, K; List, B; Lobodzinska, E; Loktionova, N; Lopez-Fernandez, R; Lubimov, V; Lueders, H; Luke, D; Lux, T; Lytkin, L; Makankine, A; Malden, N; Malinovski, E; Mangano, S; Marage, P; Marks, J; Marshall, R; Martisikova, M; Martyn, H-U; Maxfield, SJ; Meer, D; Mehta, A; Meier, K; Meyer, AB; Meyer, H; Meyer, J; Mikocki, S; Milcewicz-Mika, I; Milstead, D; Mohamed, A; Moreau, F; Morozov, A; Morris, JV; Mozer, MU; Muller, K; Murin, P; Nagovizin, V; Nankov, K; Naroska, B; Naumann, J; Naumann, Th; Newman, PR; Niebuhr, C; Nikiforov, A; Nikitin, D; Nowak, G; Nozicka, M; Oganezov, R; Olivier, B; Olsson, JE; Ozerov, D; Paramonov, A; Pascaud, C; Patel, GD; Peez, M; Perez, E; Perieanu, A; Petrukhin, A; Pitzl, D; Placakyte, R; Poschl, R; Portheault, B; Povh, B; Raicevic, N; Reimer, P; Reisert, B; Rimmer, A; Risler, C; Rizvi, E; Robmann, P; Roland, B; Roosen, R; Rostovtsev, A; Rurikova, Z; Rusakov, S; Rybicki, K; Sankey, DPC; Sauvan, E; Schatzel, S; Scheins, J; Schilling, F-P; Schleper, P; Schmidt, S; Schmitt, S; Schneider, M; Schoeffel, L; Schoning, A; Schroder, V; Schultz-Coulon, H-C; Schwanenberger, C; Sedlak, K; Sefkow, F; Sheviakov, I; Shtarkov, LN; Sirois, Y; Sloan, T; Smirnov, P; Soloviev, Y; South, D; Spaskov, V; Specka, A; Spitzer, H; Stamen, R; Stella, B; Stiewe, J; Strauch, I; Straumann, U; Tchoulakov, V; Thompson, G; Thompson, PD; Tomasz, F; Traynor, D; Truol, P; Tsipolitis, G; Tsurin, I; Turnau, J; Tzamariudaki, E; Uraev, A; Urban, M; Usik, A; Utkin, D; Valkar, S; Valkarova, A; Vallee, C; Van Mechelen, P; Van Remortel, N; Vargas Trevino, A; Vazdik, Y; Veelken, C; Vest, A; Vinokurova, S; Volchinski, V; Wacker, K; Wagner, J; Weber, G; Weber, R; Wegener, D; Werner, C; Werner, N; Wessels, M; Wessling, B; Winter, G-G; Wissing, Ch; Woehrling, E-E; Wolf, R; Wunsch, E; Xella, S; Yan, W; Yeganov, V; Zacek, J; Zalesak, J; Zhang, Z; Zhelezov, A; Zhokin, A; Zohrabyan, H; Zomer, F

dc.contributor.author	Aktas, A	en
dc.contributor.author	Andreev, V	en
dc.contributor.author	Anthonis, T	en
dc.contributor.author	Asmone, A	en
dc.contributor.author	Babaev, A	en
dc.contributor.author	Backovic, S	en
dc.contributor.author	Bahr, J	en
dc.contributor.author	Baranov, P	en
dc.contributor.author	Barrelet, E	en
dc.contributor.author	Bartel, W	en
dc.contributor.author	Baumgartner, S	en
dc.contributor.author	Becker, J	en
dc.contributor.author	Beckingham, M	en
dc.contributor.author	Behnke, O	en
dc.contributor.author	Behrendt, O	en
dc.contributor.author	Belousov, A	en
dc.contributor.author	Berger, Ch	en
dc.contributor.author	Berger, N	en
dc.contributor.author	Berndt, T	en
dc.contributor.author	Bizot, JC	en
dc.contributor.author	Bohme, J	en
dc.contributor.author	Boenig, M-O	en
dc.contributor.author	Boudry, V	en
dc.contributor.author	Bracinik, J	en
dc.contributor.author	Brisson, V	en
dc.contributor.author	Broker, H-B	en
dc.contributor.author	Brown, DP	en
dc.contributor.author	Bruncko, D	en
dc.contributor.author	Busser, FW	en
dc.contributor.author	Bunyatyan, A	en
dc.contributor.author	Buschhorn, G	en
dc.contributor.author	Bystritskaya, L	en
dc.contributor.author	Campbell, AJ	en
dc.contributor.author	Caron, S	en
dc.contributor.author	Cassol-Brunner, F	en
dc.contributor.author	Cerny, K	en
dc.contributor.author	Chekelian, V	en
dc.contributor.author	Contreras, JG	en
dc.contributor.author	Coppens, YR	en
dc.contributor.author	Coughlan, JA	en
dc.contributor.author	Cox, BE	en
dc.contributor.author	Cozzika, G	en
dc.contributor.author	Cvach, J	en
dc.contributor.author	Dainton, JB	en
dc.contributor.author	Dau, WD	en
dc.contributor.author	Daum, K	en
dc.contributor.author	Delcourt, B	en
dc.contributor.author	Demirchyan, R	en
dc.contributor.author	De Roeck, A	en
dc.contributor.author	Desch, K	en
dc.contributor.author	De Wolf, EA	en
dc.contributor.author	Diaconu, C	en
dc.contributor.author	Dingfelder, J	en
dc.contributor.author	Dodonov, V	en
dc.contributor.author	Dubak, A	en
dc.contributor.author	Duprel, C	en
dc.contributor.author	Eckerlin, G	en
dc.contributor.author	Efremenko, V	en
dc.contributor.author	Egli, S	en
dc.contributor.author	Eichler, R	en
dc.contributor.author	Eisele, F	en
dc.contributor.author	Ellerbrock, M	en
dc.contributor.author	Elsen, E	en
dc.contributor.author	Erdmann, W	en
dc.contributor.author	Faulkner, PJW	en
dc.contributor.author	Favart, L	en
dc.contributor.author	Fedotov, A	en
dc.contributor.author	Felst, R	en
dc.contributor.author	Ferencei, J	en
dc.contributor.author	Fleischer, M	en
dc.contributor.author	Fleischmann, P	en
dc.contributor.author	Fleming, YH	en
dc.contributor.author	Flucke, G	en
dc.contributor.author	Flugge, G	en
dc.contributor.author	Fomenko, A	en
dc.contributor.author	Foresti, I	en
dc.contributor.author	Formanek, J	en
dc.contributor.author	Franke, G	en
dc.contributor.author	Frising, G	en
dc.contributor.author	Gabathuler, E	en
dc.contributor.author	Gabathuler, K	en
dc.contributor.author	Garutti, E	en
dc.contributor.author	Garvey, J	en
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dc.contributor.author	Ghazaryan, S	en
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dc.contributor.author	Grassler, H	en
dc.contributor.author	Greenshaw, T	en
dc.contributor.author	Gregori, M	en
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dc.contributor.author	Gwilliam, C	en
dc.contributor.author	Haidt, D	en
dc.contributor.author	Hajduk, L	en
dc.contributor.author	Haller, J	en
dc.contributor.author	Hansson, M	en
dc.contributor.author	Heinzelmann, G	en
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dc.contributor.author	Horisberger, R	en
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dc.contributor.author	Ismail, M	en
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dc.contributor.author	Janauschek, L	en
dc.contributor.author	Janssen, X	en
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dc.contributor.author	Johnson, DP	en
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dc.contributor.author	Loktionova, N	en
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dc.contributor.author	Lueders, H	en
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dc.contributor.author	Lux, T	en
dc.contributor.author	Lytkin, L	en
dc.contributor.author	Makankine, A	en
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dc.contributor.author	Malinovski, E	en
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dc.contributor.author	Marage, P	en
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dc.contributor.author	Meyer, H	en
dc.contributor.author	Meyer, J	en
dc.contributor.author	Mikocki, S	en
dc.contributor.author	Milcewicz-Mika, I	en
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dc.contributor.author	Wissing, Ch	en
dc.contributor.author	Woehrling, E-E	en
dc.contributor.author	Wolf, R	en
dc.contributor.author	Wunsch, E	en
dc.contributor.author	Xella, S	en
dc.contributor.author	Yan, W	en
dc.contributor.author	Yeganov, V	en
dc.contributor.author	Zacek, J	en
dc.contributor.author	Zalesak, J	en
dc.contributor.author	Zhang, Z	en
dc.contributor.author	Zhelezov, A	en
dc.contributor.author	Zhokin, A	en
dc.contributor.author	Zohrabyan, H	en
dc.contributor.author	Zomer, F	en
dc.date.accessioned	2014-03-01T01:23:03Z
dc.date.available	2014-03-01T01:23:03Z
dc.date.issued	2005	en
dc.identifier.issn	0370-2693	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/16786
dc.subject.classification	Physics, Multidisciplinary	en
dc.subject.other	article	en
dc.subject.other	atomic particle	en
dc.subject.other	data analysis	en
dc.subject.other	electric current	en
dc.subject.other	electricity	en
dc.subject.other	electromagnetic field	en
dc.subject.other	electron	en
dc.subject.other	energy	en
dc.subject.other	equipment	en
dc.subject.other	gravitino	en
dc.subject.other	luminance	en
dc.subject.other	mass	en
dc.subject.other	model	en
dc.subject.other	parameter	en
dc.subject.other	photon	en
dc.subject.other	standard	en
dc.title	Search for light gravitinos in events with photons and missing transverse momentum at HERA	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.physletb.2005.04.038	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.physletb.2005.04.038	en
heal.language	English	en
heal.publicationDate	2005	en
heal.abstract	A search for gravitinos produced in e(+/-)p collisions is performed using the H1 detector at HERA. The data were taken at a centre-of-mass energy of 319 GeV and correspond to an integrated luminosity of 64.3 pb(-1) for e(+)p collisions and 13.5 pb(-1) for e(-)p collisions. If R-parity is not conserved, the t-channel exchange of a selectron can produce a neutralino, which, in models where the gravitino is the lightest supersymmetric particle, subsequently decays into a photon and a light gravitino. The resulting event signature, which involves an isolated photon, a jet and missing transverse energy, is analysed for the first time at HERA. No deviation from the Standard Model is found. Exclusion limits on the cross section and on R-parity-violating Yukawa couplings are derived in a Gauge Mediated Supersymmetry Breaking scenario. The results are independent of the squark sector. Neutralinos and supersymmetric partners of the left-handed electron with masses up to 112 GeV and 164 GeV, respectively, can be ruled out at the 95% confidence level for R-parity-violating couplings lambda' equal to 1, in some parts of the parameter space of the considered model. (c) 2005 Elsevier B.V. All rights reserved.	en
heal.publisher	ELSEVIER SCIENCE BV	en
heal.journalName	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics	en
dc.identifier.doi	10.1016/j.physletb.2005.04.038	en
dc.identifier.isi	ISI:000229653800005	en
dc.identifier.volume	616	en
dc.identifier.issue	1-2	en
dc.identifier.spage	31	en
dc.identifier.epage	42	en