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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 and Bartel, W , et al. (2005) In Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics 616(1-2). p.31-42
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... (More)
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. (Less)
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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics
volume
616
issue
1-2
pages
31 - 42
publisher
Elsevier
external identifiers
  • wos:000229653800005
  • scopus:21144432523
ISSN
0370-2693
DOI
10.1016/j.physletb.2005.04.038
language
English
LU publication?
yes
id
26594396-da64-489f-af14-e491670f96a7 (old id 236409)
date added to LUP
2016-04-01 15:39:06
date last changed
2023-02-22 18:26:51
@article{26594396-da64-489f-af14-e491670f96a7,
  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.}},
  author       = {{Aktas, A and Andreev, V and Anthonis, T and Asmone, A and Babaev, A and Backovic, S and Bahr, J and Baranov, P and Barrelet, E and Bartel, W and Baumgartner, S and Becker, J and Beckingham, M and Behnke, O and Behrendt, O and Belousov, A and Berger, C and Berger, N and Berndt, T and Bizot, JC and Bohme, J and Boenig, MO and Boudry, V and Bracinik, J and Brisson, V and Broker, HB and Brown, DP and Bruncko, D and Busser, FW and Bunyatyan, A and Buschhorn, G and Bystritskaya, L and Campbell, AJ and Caron, S and Cassol-Brunner, F and Cerny, K and Chekelian, V and Contreras, JG and Coppens, YR and Coughlan, JA and Cox, BE and Cozzika, G and Cvach, J and Dainton, JB and Dau, WD and Daum, K and Delcourt, B and Demirchyan, R and De Roeck, A and Desch, K and De Wolf, EA and Diaconu, C and Dingfelder, J and Dodonov, V and Dubak, A and Duprel, C and Eckerlin, G and Efremenko, V and Egli, S and Eichler, R and Eisele, F and Ellerbrock, M and Elsen, E and Erdmann, W and Faulkner, PJW and Favart, L and Fedotov, A and Felst, R and Ferencei, J and Fleischer, M and Fleischmann, P and Fleming, Y and Flucke, G and Flugge, G and Fomenko, A and Foresti, I and Formanek, J and Franke, G and Frising, G and Gabathuler, E and Gabathuler, K and Garutti, E and Garvey, J and Gayler, J and Gerhards, R and Gerlich, C and Ghazaryan, S and Ginzburgskaya, S and Goerlich, L and Gogitidze, N and Gorbounov, S and Grab, C and Grassler, H and Greenshaw, T and Gregori, M and Grindhammer, G and Gwilliam, C and Haidt, D and Hajduk, L and Haller, J and Hansson, Magnus and Heinzelmann, G and Henderson, RCW and Henschel, H and Henshaw, O and Herrera, G and Herynek, I and Heuer, RD and Hildebrandt, M and Hiller, KH and Hoting, P and Hoffmann, D and Horisberger, R and Hovhannisyan, A and Ibbotson, M and Ismail, M and Jacquet, M and Janauschek, L and Janssen, X and Jemanov, V and Jönsson, Leif and Johnson, DP and Jung, Hannes and Kant, D and Kapichine, M and Karlsson, M and Katzy, J and Keller, N and Kenyon, IR and Kiesling, C and Klein, M and Kleinwort, C and Klimkovich, T and Kluge, T and Knies, G and Knutsson, Albert and Koblitz, B and Korbel, V and Kostka, P and Koutouev, R and Kropivnitskaya, A and Kroseberg, J and Kruger, K and Kuckens, J and Landon, MPJ and Lange, W and Lastovicka, T and Laycock, P and Lebedev, A and Leissner, B and Lemrani, R and Lendermann, V and Levonian, S and Lindfeld, L and Lipka, K and List, B and Lobodzinska, E and Loktionova, N and Lopez-Fernandez, R and Lubimov, V and Lueders, H and Luke, D and Lux, T and Lytkin, L and Makankine, A and Malden, N and Malinovski, E and Mangano, S and Marage, P and Marks, J and Marshall, R and Martisikova, M and Martyn, HU and Maxfield, SJ and Meer, D and Mehta, A and Meier, K and Meyer, AB and Meyer, H and Meyer, J and Mikocki, S and Milcewicz-Mika, I and Milstead, D and Mohamed, A and Moreau, F and Morozov, A and Morris, JV and Mozer, MU and Muller, K and Murin, P and Nagovizin, V and Nankov, K and Naroska, B and Naumann, J and Naumann, T and Newman, PR and Niebuhr, C and Nikiforov, A and Nikitin, D and Nowak, G and Nozicka, M and Oganezov, R and Olivier, B and Olsson, JE and Ozerov, D and Paramonov, A and Pascaud, C and Patel, GD and Peez, M and Perez, E and Perieanu, A and Petrukhin, A and Pitzl, D and Placakyte, R and Poschl, R and Portheault, B and Povh, B and Raicevic, N and Reimer, P and Reisert, B and Rimmer, A and Risler, C and Rizvi, E and Robmann, P and Roland, B and Roosen, R and Rostovtsev, A and Rurikova, Z and Rusakov, S and Rybicki, K and Sankey, DPC and Sauvan, E and Schatzel, S and Scheins, J and Schilling, RP and Schleper, P and Schmidt, S and Schmitt, S and Schneider, M and Schoeffel, L and Schoning, A and Schroder, V and Schultz-Coulon, HC and Schwanenberger, C and Sedlak, K and Sefkow, F and Sheviakov, I and Shtarkov, LN and Sirois, Y and Sloan, T and Smirnov, P and Soloviev, Y and South, D and Spaskov, V and Specka, A and Spitzer, H and Stamen, R and Stella, B and Stiewe, J and Strauch, I and Straumann, U and Tchoulakov, V and Thompson, G and Thompson, PD and Tomasz, E and Traynor, D and Truol, P and Tsipolitis, G and Tsurin, I and Turnau, J and Tzamariudaki, E and Uraev, A and Urban, M and Usik, A and Utkin, D and Valkar, S and Valkarova, A and Vallee, C and Van Mechelen, P and Van Remortel, N and Trevino, AV and Vazdik, Y and Veelken, C and Vest, A and Vinokurova, S and Volchinski, V and Wacker, K and Wagner, J and Weber, G and Weber, R and Wegener, D and Werner, C and Werner, N and Wessels, M and Wessling, B and Winter, GG and Wissing, C and Woehrling, EE and Wolf, R and Wunsch, E and Xella, S and Yan, W and Yeganov, V and Zacek, J and Zalesak, J and Zhang, Z and Zhelezov, A and Zhokin, A and Zohrabyan, H and Zomer, F}},
  issn         = {{0370-2693}},
  language     = {{eng}},
  number       = {{1-2}},
  pages        = {{31--42}},
  publisher    = {{Elsevier}},
  series       = {{Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics}},
  title        = {{Search for light gravitinos in events with photons and missing transverse momentum at HERA}},
  url          = {{http://dx.doi.org/10.1016/j.physletb.2005.04.038}},
  doi          = {{10.1016/j.physletb.2005.04.038}},
  volume       = {{616}},
  year         = {{2005}},
}