Search for contact interactions in dilepton events from pp collisions at root s=7 TeV with the ATLAS detector

Abstract

This Letter presents a search for contact interactions in the dielectron and dimuon channels using data from proton–proton collisions produced by the LHC at √s = 7 TeV and recorded by the ATLAS detector. The data sample, collected in 2011, corresponds to an integrated luminosity of 1.08 and 1.21 fb−1 in the e+e− and μ+μ− channels, respectively. No significant deviations from the standard model are observed. Using a Bayesian approach with a prior flat in 1/Λ2, the following 95% CL lower limits are placed on the energy scale of ��qq contact interactions: Λ− > 10.1 TeV (Λ+ > 9.4 TeV) in the electron channel and Λ− > 8.0 TeV (Λ+ > 7.0 TeV) in the muon channel for constructive (destructive) interference in the left–left isoscalar contact interaction model. Limits are also provided for a prior flat in 1/Λ4.

Metadata

Authors/Creators:	Aad, G Abbott, B Abdallah, J Abdelalim, AA Abdesselam, A Abdinov, O Abi, B Abolins, M AbouZeid, OS Abramowicz, H Abreu, H Acerbi, E Acharya, BS Adamczyk, L Adams, DL Addy, TN Adelman, J Aderholz, M Adomeit, S Adragna, P Adye, T Aefsky, S Aguilar-Saavedra, JA Aharrouche, M Ahlen, SP Ahles, F Ahmad, A Ahsan, M Aielli, G Akdogan, T Akesson, TPA Akimoto, G Akimov, AV Akiyama, A Alam, MS Alam, MA Albert, J Albrand, S Aleksa, M Aleksandrov, IN Alessandria, F Alexa, C Alexander, G Alexandre, G Alexopoulos, T Alhroob, M Aliev, M Alimonti, G Alison, J Aliyev, M Allport, PP Allwood-Spiers, SE Almond, J Aloisio, A Alon, R Alonso, A Gonzalez, BA Alviggi, MG Amako, K Amaral, P Amelung, C Ammosov, VV Amorim, A Amoros, G Amram, N Anastopoulos, C Ancu, LS Andari, N Andeen, T Anders, CF Anders, G Anderson, KJ Andreazza, A Andrei, V Andrieux, M-L Anduaga, XS Angerami, A Anghinolfi, F Anisenkov, A Anjos, N Annovi, A Antonaki, A Antonelli, M Antonov, A Antos, J Anulli, F Aoun, S Bella, LA Apolle, R Arabidze, G Aracena, I Arai, Y Arce, ATH Archambault, JP Arfaoui, S Arguin, J-F Arik, E Arik, M Armbruster, AJ Arnaez, O Arnault, C Artamonov, A Artoni, G Arutinov, D Asai, S Asfandiyarov, R Ask, S Asman, B Asquith, L Assamagan, K Astbury, A Astvatsatourov, A Aubert, B Auge, E Augsten, K Aurousseau, M Avolio, G Avramidou, R Axen, D Ay, C Azuelos, G Azuma, Y Baak, MA Baccaglioni, G Bacci, C Bach, AM Bachacou, H Bachas, K Bachy, G Backes, M Backhaus, M Badescu, E Bagnaia, P Bahinipati, S Bai, Y Bailey, DC Bain, T Baines, JT Baker, OK Baker, MD Baker, S Banas, E Banerjee, P Banerjee, S Banfi, D Bangert, A Bansal, V Bansil, HS Barak, L Baranov, SP Barashkou, A Galtieri, AB Barber, T Barberio, EL Barberis, D Barbero, M Bardin, DY Barillari, T Barisonzi, M Barklow, T Barlow, N Barnett, BM Barnett, RM Baroncelli, A Barone, G Barr, AJ Barreiro, F da Costa, JBG Barrillon, P Bartoldus, R Barton, AE Bartsch, V Bates, RL Branchini, P Brandenburg, GW Brandt, A Brandt, G Brandt, O Bratzler, U Brau, B Brau, JE Braun, HM Brelier, B Bremer, J Brenner, R Bressler, S Breton, D Britton, D Brochu, FM Brock, I Brock, R Brodbeck, TJ Brodet, E Broggi, F Harpaz, SB Behera, PK Beimforde, M Belanger-Champagne, C Bell, PJ Bell, WH Bella, G Bellagamba, L Bellina, F Bellomo, M Belloni, A Beloborodova, O Belotskiy, K Beltramello, O Ben Ami, S Benary, O Benchekroun, D Benchouk, C Bendel, M Benekos, N Benhammou, Y Noccioli, EB Garcia, JAB Benjamin, DP Benoit, M Bensinger, JR Benslama, K Bentvelsen, S Berge, D Kuutmann, EB Berger, N Berghaus, F Berglund, E Beringer, J Bernat, P Bernhard, R Bernius, C Berry, T Bertella, C Bertin, A Bertinelli, F Bertolucci, F Besana, MI Besson, N Bethke, S Bhimji, W Bianchi, RM Bianco, M Biebel, O Bieniek, SP Bierwagen, K Biesiada, J Biglietti, M Bilokon, H Bindi, M Binet, S Bingul, A Bini, C Biscarat, C Bitenc, U Black, KM Blair, RE Blanchard, J-B Blanchot, G Blazek, T Blocker, C Blocki, J Blondel, A Blum, W Blumenschein, U Bobbink, GJ Bobrovnikov, VB Bocchetta, SS Bocci, A Boddy, CR Boehler, M Boek, J Boelaert, N Boeser, S Bogaerts, JA Bogdanchikov, A Bogouch, A Bohm, C Boisvert, V Bold, T Boldea, V Bolnet, NM Bona, M Bondarenko, VG Bruni, G Bruschi, M Buanes, T https://orcid.org/0000-0002-6051-2847 Buat, Q Bucci, F Buchanan, J Buchanan, NJ Buchholz, P Buckingham, RM Buckley, AG Buda, SI Budagov, IA Budick, B Buescher, V Bugge, L Bulekov, O Bunse, M Buran, T Burckhart, H Burdin, S Burgess, T Burke, S Busato, E Bussey, P Buszello, CP Butin, F Butler, B Butler, JM Buttar, CM Butterworth, JM Buttinger, W Cabrera Urban, S Caforio, D Cakir, O Calafiura, P Calderini, G Calfayan, P Calkins, R Caloba, LP Caloi, R Calvet, D Calvet, S Toro, RC Camarri, P Cambiaghi, M Cameron, D Caminada, LM Campana, S Campanelli, M Canale, V Canelli, F Canepa, A Cantero, J Capasso, L Garrido, MDMC Caprini, I Caprini, M Capriotti, D Capua, M Caputo, R Caramarcu, C Cardarelli, R Carli, T Carlino, G Carminati, L Caron, B Caron, S Montoya, GDC Carter, AA Carter, JR Carvalho, J Casadei, D Casado, MP Cascella, M Caso, C Hernandez, AMC Castaneda-Miranda, E Castillo Gimenez, V Castro, NF Cataldi, G Cataneo, F Catinaccio, A Catmore, JR Cattai, A Cattani, G Caughron, S Cauz, D Cavalleri, R Cavalli, D Cavalli-Sforza, M Cavasinni, V Ceradini, F Cerqueira, AS Cerri, A Cerrito, L Cerutti, F Cetin, SA Cevenini, F Chafaq, A Chakraborty, D Chan, K Chapleau, B Chapman, JD Chapman, JW Chareyre, E Charlton, DG Chavda, V Barajas, CAC Cheatham, S Chekanov, S Chekulaev, SV Chelkov, GA Chelstowska, MA Chen, C Chen, H Chen, S Chen, T Chen, X Cheng, S Cheplakov, A Chepurnov, VF Cherkaoui El Moursli, R Chernyatin, V Cheu, E Cheung, SL Chevalier, L Chiefari, G Chikovani, L Childers, JT Chilingarov, A Chiodini, G Chizhov, MV Choudalakis, G Chouridou, S Christidi, IA Christov, A Chromek-Burckhart, D Chu, ML Chudoba, J Ciapetti, G Ciba, K Ciftci, AK Ciftci, R Cinca, D Cindro, V Ciobotaru, MD Cocca, C Ciocio, A Cirilli, M Citteri, M Ciubancan, M Clark, A Clark, PJ Cleland, W Clemens, JC Clement, B Clement, C Clifft, RW Coadou, Y Cobal, M Coccaro, A Cochran, J Coe, P Cogan, JG Coggeshall, J Cogneras, E Colas, J Colijn, AP Collins, NJ Collins-Tooth, C Collot, J Colon, G Conde Muino, P Coniavitis, E Conidi, MC Consonni, M Consorti, V Constantinescu, S Conta, C Conventi, F Cook, J Cooke, M Cooper, BD Cooper-Sarkar, AM Copic, K Cornelissen, T Corradi, M Corriveau, F Cortes-Gonzalez, A Cortiana, G Costa, G Costa, MJ Costanzo, D Costin, T Cote, D Coura Torres, R Courneyea, L Cowan, G Cowden, C Cox, BE Cranmer, K Crescioli, F Cristinziani, M Crosetti, G Crupi, R Crepe-Renaudin, S Cuciuc, C-M Almenar, CC Donszelmann, TC Curatolo, M Curtis, CJ Cuthbert, C Cwetanski, P Czirr, H Czodrowski, P Czyczula, Z D'Auria, S D'Onofrio, M D'Orazio, A Da Silva, PVM Da Via, C Dabrowski, W Dai, T Dallapiccola, C Dam, M Nagano, K Nagasaka, Y Nagel, M Nairz, AM Nakahama, Y Nakamura, K Nakamura, T Nakano, I Nanava, G Napier, A Narayan, R Nash, M Nation, NR Nattermann, T 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Omachi, C Onofreay, A Onyisi, PUE Oram, CJ Oreglia, MJ Oren, Y Orestano, D Orlov, I Barrera, CO Orr, RS Osculati, B Ospanov, R Osuna, C Otero y Garzon, G Ottersbach, JP Ouchrif, M Ouellette, EA Ould-Saada, F Ouraou, A Ouyang, Q Ovcharova, A Owen, M Owen, S Ozcan, VE Ozturk, N Pacheco Pages, A Padilla Aranda, C Griso, SP Paganis, E Paige, E Pais, R Pajchel, K Palacino, G Paleari, CP Palestini, S Pallin, D Palma, A Palmer, JD Pan, YB Panagiotopoulou, E Panes, B Panikashvili, N Panitkin, S Pantea, D Panuskova, M Paolone, V Papadelis, A Papadopoulou, TD Paramonov, A Park, W Parker, MA Parodi, F Parsons, JA Parzefall, U Pasqualucci, E Passaggio, S Passeri, A Pastore, F Pastore, F Pasztor, G Pataraia, S Goessling, C Goettfert, T Goldfarb, S Golling, T Golovnia, SN Gomes, A Fajardo, LSG Goncalo, R Da Costa, JGPF Gonella, L Gonidec, A Gonzalez, S Gonzalez de la Hoz, S Gonzalez Parra, G Gonzalez Silva, ML Gonzalez-Sevilla, S Goodson, JJ Goossens, L Gorbounov, PA Gordon, HA Gorelov, I Gorfine, G 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JB Hansen, JD Hansen, PH Hansson, P Nara, K Hare, GA Harenberg, T Harkusha, S Harper, D Harrington, RD Harris, OM Harrison, K Hartert, J Hartjes, F Haruyama, T Harvey, A Hasegawa, S Hasegawa, Y Hassani, S Hatch, M Hauff, D Haug, S Hauschild, M Hauser, R Havranek, M Hawes, BM Hawkes, CM Hawkings, RJ Hawkins, AD Hawkins, D Hayakawa, T Hayashi, T Hayden, D Hayward, HS Haywood, SJ Hazen, E He, M Head, SJ Hedberg, V Heelan, L Heim, S Heinemann, B Heisterkamp, S Helary, L Heller, C Heller, M Hellman, S Hellmich, D Helsens, C Henderson, RCW Henke, M Henrichs, A Correia, AMH Henrot-Versille, S Henry-Couannier, F Hensel, C Henss, T Hernandez, CM Hernandez Jimenez, Y Herrberg, R Hershenhorn, AD Herten, G Hertenberger, R Hervas, L Hessey, NP Higom-Rodriguez, E Hill, D Hill, JC Hill, N Hiller, KH Hillert, S Hillier, SJ Hinchliffe, I Hines, E Hirose, M Hirsch, F Hirschbuehl, D Hobbs, J Hod, N Hodgkinson, MC Hodgson, R Hoecker, A Hoeferkamp, MR Hoffman, J Hoffmann, D Hohlfeld, M Holder, M Holmgren, 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Viehhauser, GHA Viel, S Villa, M Perez, MV Vilucchi, E Vincter, MG Vinek, E Vinogradov, VB Virchaux, M Virzi, J Vitells, O Viti, M Vivarelli, I Vaque, FV Vlachos, S Vladoiu, D Vlasak, M Vlasov, N Vogel, A Vokac, P Volpi, G Volpi, M Volpini, G von der Schmitt, H von Loeben, J von Radziewski, H von Toerne, E Vorobel, V Vorobiev, AP Vorwerk, V Vos, M Voss, R Voss, TT Vossebeld, JH Vranjes, N Milosavljevic, MV Vrba, V Vreeswijk, M Anh, TV Vuillermet, R Vukotic, I Wagner, W Wagner, P Wahlen, H Wakabayashi, J Walbersloh, J Walch, S Walder, J Walker, R Walkowiak, W Wall, R Waller, P Wang, C Wang, H Wang, H Wang, J Wang, J Wang, JC Wang, R Wang, SM Warburton, A Ward, CP Warsinsky, M Watkins, PM Watson, AT Watson, IJ Watson, MF Watts, G Watts, S Waugh, AT Waugh, BM Weber, M Weber, MS Weber, P Weidberg, AR Weigell, P Weingarten, J Weiser, C Wellenstein, H Wells, PS Wen, M Wenaus, T Wendler, S Weng, Z Wengler, T Wenig, S Wermes, N Werner, M Werner, P Werth, M Wessels, M Weydert, C Whalen, K Wheeler-Ellis, SJ Whitaker, SP White, A White, MJ Whitehead, SR Whiteson, D Whittington, D Wicek, F Wicke, D Wickens, FJ Wiedenmann, W Wielers, M Wienemann, P Wiglesworth, C Wiik-Fuchs, LAM Wijeratne, PA Wildauer, A Wildt, MA Wilhelm, I Wilkens, HG Will, JZ Williams, E Williams, HH Willis, W Willocq, S Wilson, JA Wilson, MG Wilson, A Wingerter-Seez, I Winkelmann, S Winklmeier, F Wittgen, M Wolter, MW Wolters, H Wong, WC Wooden, G Wosiek, BK Wotschack, J Woudstra, MJ Wozniak, KW Wraight, K Wright, C Wright, M Wrona, B Wu, SL Wu, X Wu, Y Wulf, E Wunstorf, R Wynne, BM Xella, S Xiao, M Xie, S Xie, Y Xu, C Xu, D Xu, G Yabsley, B Yacoob, S Yamada, M Yamaguchi, H Yamamoto, A Yamamoto, K Yamamoto, S Yamamura, T Yamanaka, T Yamaoka, J Yamazaki, T Yamazaki, Y Yan, Z Yang, H Yang, UK Yang, Y Yang, Y Yang, Z Yanush, S Yao, Y Yasu, Y Smit, GVY Ye, J Ye, S Yilmaz, M Yoosoofmiya, R Yorita, K Yoshida, R Young, C Youssef, S Yu, D Yu, J Yu, J Yuan, L Yurkewicz, A Zabinski, B Zaets, VG Zaidan, R Zaitsev, AM Zajacova, Z Zanello, L Zarzhitsky, P Zaytsev, A Zeitnitz, C Zeller, M Zeman, M Zemla, A Zendler, C Zenin, O Zenis, T Zinonos, Z Zenz, S Zerwas, D della Porta, GZ Zhan, Z Zhang, D Zhang, H Zhang, J Zhang, X Zhang, Z Zhao, L Zhao, T Zhao, Z Zhemchugov, A Zheng, S Zhong, J Zhou, B Zhou, N Zhou, Y Zhu, CG Zhu, H Zhu, J Zhu, Y Zhuang, X Zhuravlov, V Zieminska, D Zimmermann, R Zimmermann, S Zimmermann, S Ziolkowski, M Zitoun, R Zivkovic, L Zmouchko, VV Zobernig, G Zoccoli, A Zolnierowski, Y Zsenei, A zur Nedden, M Zutshi, V Zwalinski, L Collaboration, ATLAS
Copyright, Publisher and Additional Information:	© 2012 CERN. Published by Elsevier B.V. This article is published Open Access at sciencedirect.com. It is distributed under the terms of the Creative Commons Attribution License 3.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are credited.
Dates:	Accepted: 11 April 2012 Published (online): 17 April 2012 Published: 30 May 2012
Institution:	The University of Sheffield
Academic Units:	The University of Sheffield > Faculty of Science (Sheffield) > Department of Physics and Astronomy (Sheffield)
Depositing User:	Symplectic Sheffield
Date Deposited:	02 Dec 2016 13:31
Last Modified:	02 Dec 2016 13:31
Published Version:	https://doi.org/10.1016/j.physletb.2012.04.026
Status:	Published
Publisher:	Elsevier
Refereed:	Yes
Identification Number:	https://doi.org/10.1016/j.physletb.2012.04.026
Related URLs:	Author

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Search for contact interactions in dilepton events from pp collisions at root s=7 TeV with the ATLAS detector

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