Abstract

A search for squarks in R-parity violating supersymmetry is performed in e±p collisions at HERA using the H1 detector. The full data sample taken at a centre-of-mass energy \(\sqrt{s}=319\) GeV is used for the analysis, corresponding to an integrated luminosity of 255 pb−1 of e+p and 183 pb−1 of e−p collision data. The resonant production of squarks via a Yukawa coupling λ′ is considered, taking into account direct and indirect R-parity violating decay modes. Final states with jets and leptons are investigated. No evidence for squark production is found and mass dependent limits on λ′ are obtained in the framework of the Minimal Supersymmetric Standard Model and in the Minimal Supergravity Model. In the considered part of the parameter space, for a Yukawa coupling of electromagnetic strength λ′=0.3, squarks of all flavours are excluded up to masses of 275 GeV at 95% confidence level, with down-type squarks further excluded up to masses of 290 GeV.

Details

Title
Search for squarks in R-parity violating supersymmetry in ep collisions at HERA
Author
Aaron, F D 1 ; Alexa, C 1 ; Andreev, V 2 ; Backovic, S 3 ; Baghdasaryan, A 4 ; Baghdasaryan, S 4 ; Barrelet, E 5 ; Bartel, W 6 ; Begzsuren, K 7 ; Belousov, A 2 ; Bizot, J C 8 ; Boudry, V 9 ; Bozovic-Jelisavcic, I 10 ; Bracinik, J 11 ; Brandt, G 6 ; Brinkmann, M 6 ; Brisson, V 8 ; Britzger, D 6 ; Bruncko, D 12 ; Bunyatyan, A 13 ; Buschhorn, G 14 ; Bystritskaya, L 15 ; Campbell, A J 6 ; Cantun Avila, K B 16 ; Ceccopieri, F 17 ; Cerny, K 18 ; Cerny, V 12 ; Chekelian, V 14 ; Cholewa, A 6 ; Contreras, J G 16 ; Coughlan, J A 19 ; Cvach, J 20 ; Dainton, J B 21 ; Daum, K 22 ; Delcourt, B 8 ; Delvax, J 17 ; De Wolf, E A 17 ; Diaconu, C 23 ; Dobre, M 24 ; Dodonov, V 25 ; Dossanov, A 14 ; Dubak, A 3 ; Eckerlin, G 6 ; Egli, S 26 ; Eliseev, A 2 ; Elsen, E 6 ; Favart, L 17 ; Fedotov, A 15 ; Felst, R 6 ; Feltesse, J 27 ; Ferencei, J 12 ; D-J Fischer 6 ; Fleischer, M 6 ; Fomenko, A 2 ; Gabathuler, E 21 ; Gayler, J 6 ; Ghazaryan, S 6 ; Glazov, A 6 ; Goerlich, L 28 ; Gogitidze, N 2 ; Gouzevitch, M 6 ; Grab, C 29 ; Grebenyuk, A 6 ; Greenshaw, T 21 ; Grell, B R 6 ; Grindhammer, G 14 ; Habib, S 6 ; Haidt, D 6 ; Helebrant, C 6 ; Henderson, R C W 30 ; Hennekemper, E 31 ; Henschel, H 32 ; Herbst, M 31 ; Herrera, G 33 ; Hildebrandt, M 26 ; Hiller, K H 32 ; Hoffmann, D 23 ; Horisberger, R 26 ; Hreus, T 17 ; Huber, F 34 ; Jacquet, M 8 ; Janssen, X 17 ; Jönsson, L 35 ; Jung, A W 31 ; Jung, H 36 ; Kapichine, M 37 ; Katzy, J 6 ; Kenyon, I R 11 ; Kiesling, C 14 ; Klein, M 21 ; Kleinwort, C 6 ; Kluge, T 21 ; Knutsson, A 6 ; Kogler, R 14 ; Kostka, P 32 ; Kraemer, M 6 ; Kretzschmar, J 21 ; Krüger, K 31 ; Kutak, K 6 ; Landon, M P J 38 ; Lange, W 32 ; Laštovička-Medin, G 3 ; Laycock, P 21 ; Lebedev, A 2 ; Lendermann, V 31 ; Levonian, S 6 ; Lipka, K 6 ; List, B 24 ; List, J 6 ; Loktionova, N 2 ; Lopez-Fernandez, R 33 ; Lubimov, V 15 ; Makankine, A 37 ; Malinovski, E 2 ; Marage, P 17 ; H-U, Martyn 39 ; Maxfield, S J 21 ; Mehta, A 21 ; Meyer, A B 6 ; Meyer, H 22 ; Meyer, J 6 ; Mikocki, S 28 ; Milcewicz-Mika, I 28 ; Moreau, F 9 ; Morozov, A 37 ; Morris, J V 19 ; Mozer, M U 17 ; Mudrinic, M 10 ; Müller, K 40 ; Naumann, Th 32 ; Newman, P R 11 ; Niebuhr, C 6 ; Nikitin, D 37 ; Nowak, G 28 ; Nowak, K 6 ; Olsson, J E 6 ; Osman, S 35 ; Ozerov, D 15 ; Pahl, P 6 ; Palichik, V 37 ; Panagoulias, I 6 ; Pandurovic, M 10 ; Papadopoulou, Th 6 ; Pascaud, C 8 ; Patel, G D 21 ; Perez, E 27 ; Petrukhin, A 6 ; Picuric, I 3 ; Piec, S 6 ; Pirumov, H 34 ; Pitzl, D 6 ; Plačakytė, R 24 ; Pokorny, B 18 ; Polifka, R 18 ; Povh, B 25 ; Radescu, V 34 ; Raicevic, N 3 ; Ravdandorj, T 7 ; Reimer, P 20 ; Rizvi, E 38 ; Robmann, P 40 ; Roosen, R 17 ; Rostovtsev, A 15 ; Rotaru, M 1 ; Ruiz Tabasco, J E 16 ; Rusakov, S 2 ; Šálek, D 18 ; Sankey, D P C 19 ; Sauter, M 34 ; Sauvan, E 23 ; Schmitt, S 6 ; Schoeffel, L 27 ; Schöning, A 34 ; H-C Schultz-Coulon 31 ; Sefkow, F 6 ; Shtarkov, L N 2 ; Shushkevich, S 14 ; Sloan, T 30 ; Smiljanic, I 10 ; Soloviev, Y 2 ; Sopicki, P 28 ; South, D 6 ; Spaskov, V 37 ; Specka, A 9 ; Staykova, Z 6 ; Steder, M 6 ; Stella, B 41 ; Stoicea, G 1 ; Straumann, U 40 ; Sunar, D 17 ; Sykora, T 42 ; Thompson, G 38 ; Thompson, P D 11 ; Toll, T 6 ; Tran, T H 8 ; Traynor, D 38 ; Truöl, P 40 ; Tsakov, I 43 ; Tseepeldorj, B 7 ; Turnau, J 28 ; Urban, K 31 ; Valkárová, A 18 ; Vallée, C 23 ; P Van Mechelen 17 ; Vazdik, Y 2 ; von den Driesch, M 6 ; Wegener, D 44 ; Wünsch, E 6 ; Žáček, J 18 ; Zálešák, J 20 ; Zhang, Z 8 ; Zhokin, A 15 ; Zohrabyan, H 4 ; Zomer, F 8 

1  National Institute for Physics and Nuclear Engineering (NIPNE), Bucharest, Romania 
2  Lebedev Physical Institute, Moscow, Russia 
3  Faculty of Science, University of Montenegro, Podgorica, Montenegro 
4  Yerevan Physics Institute, Yerevan, Armenia 
5  LPNHE, Université Pierre et Marie Curie Paris 6, Université Denis Diderot Paris 7, CNRS/IN2P3, Paris, France 
6  DESY, Hamburg, Germany 
7  Institute of Physics and Technology of the Mongolian Academy of Sciences, Ulaanbaatar, Mongolia 
8  LAL, Université Paris-Sud, CNRS/IN2P3, Orsay, France 
9  LLR, Ecole Polytechnique, CNRS/IN2P3, Palaiseau, France 
10  Vinca Institute of Nuclear Sciences, University of Belgrade, Belgrade, Serbia 
11  School of Physics and Astronomy, University of Birmingham, Birmingham, UK 
12  Institute of Experimental Physics, Slovak Academy of Sciences, Košice, Slovak Republic 
13  Max-Planck-Institut für Kernphysik, Heidelberg, Germany; Yerevan Physics Institute, Yerevan, Armenia 
14  Max-Planck-Institut für Physik, München, Germany 
15  Institute for Theoretical and Experimental Physics, Moscow, Russia 
16  Departamento de Fisica Aplicada, CINVESTAV, Mérida, Yucatán, Mexico 
17  Inter-University Institute for High Energies ULB-VUB, Brussels and Universiteit Antwerpen, Antwerpen, Belgium 
18  Faculty of Mathematics and Physics, Charles University, Praha, Czech Republic 
19  Rutherford Appleton Laboratory, Didcot, UK 
20  Institute of Physics, Academy of Sciences of the Czech Republic, Praha, Czech Republic 
21  Department of Physics, University of Liverpool, Liverpool, UK 
22  Fachbereich C, Universität Wuppertal, Wuppertal, Germany 
23  CPPM, Aix-Marseille Université, CNRS/IN2P3, Marseille, France 
24  Institut für Experimentalphysik, Universität Hamburg, Hamburg, Germany 
25  Max-Planck-Institut für Kernphysik, Heidelberg, Germany 
26  Paul Scherrer Institut, Villigen, Switzerland 
27  CEA, DSM/Irfu, CE-Saclay, Gif-sur-Yvette, France 
28  Institute for Nuclear Physics, Cracow, Poland 
29  Institut für Teilchenphysik, ETH, Zürich, Switzerland 
30  Department of Physics, University of Lancaster, Lancaster, UK 
31  Kirchhoff-Institut für Physik, Universität Heidelberg, Heidelberg, Germany 
32  DESY, Zeuthen, Germany 
33  Departamento de Fisica, CINVESTAV IPN, México City, Mexico 
34  Physikalisches Institut, Universität Heidelberg, Heidelberg, Germany 
35  Physics Department, University of Lund, Lund, Sweden 
36  DESY, Hamburg, Germany; Inter-University Institute for High Energies ULB-VUB, Brussels and Universiteit Antwerpen, Antwerpen, Belgium 
37  Joint Institute for Nuclear Research, Dubna, Russia 
38  Queen Mary and Westfield College, London, UK 
39  I. Physikalisches Institut der RWTH, Aachen, Germany 
40  Physik-Institut der Universität Zürich, Zürich, Switzerland 
41  Dipartimento di Fisica, Università di Roma Tre and INFN Roma 3, Rome, Italy 
42  Faculty of Mathematics and Physics, Charles University, Praha, Czech Republic; Inter-University Institute for High Energies ULB-VUB, Brussels and Universiteit Antwerpen, Antwerpen, Belgium 
43  Institute for Nuclear Research and Nuclear Energy, Sofia, Bulgaria 
44  Institut für Physik, TU Dortmund, Dortmund, Germany 
Pages
1-16
Publication year
2011
Publication date
Mar 2011
Publisher
Springer Nature B.V.
ISSN
14346044
e-ISSN
14346052
Source type
Scholarly Journal
Language of publication
English
DOI
https://doi.org/10.1140/epjc/s10052-011-1572-y
ProQuest document ID
2294033309
Copyright
The European Physical Journal C is a copyright of Springer, (2011). All Rights Reserved., © 2011. This work is published under https://creativecommons.org/licenses/by-nc/2.0 (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.