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

Physical Review D - Particles, Fields, Gravitation and Cosmology 84:1 (2011)

Authors:

G Aad, B Abbott, J Abdallah, AA Abdelalim, A Abdesselam, O Abdinov, B Abi, M Abolins, H Abramowicz, H Abreu, E Acerbi, BS Acharya, DL Adams, TN Addy, J Adelman, M Aderholz, S Adomeit, P Adragna, T Adye, S Aefsky, JA Aguilar-Saavedra, M Aharrouche, SP Ahlen, F Ahles, A Ahmad, M Ahsan, G Aielli, T Akdogan, TPA Åkesson, G Akimoto, AV Akimov, A Akiyama, MS Alam, MA Alam, S Albrand, M Aleksa, IN Aleksandrov, F Alessandria, C Alexa, G Alexander, G Alexandre, T Alexopoulos, M Alhroob, M Aliev, G Alimonti, J Alison, M Aliyev, PP Allport, SE Allwood-Spiers, J Almond, A Aloisio, R Alon, A Alonso, MG Alviggi, K Amako, P Amaral, C Amelung, VV Ammosov, A Amorim, G Amorós, N Amram, C Anastopoulos, T Andeen, CF Anders, KJ Anderson, A Andreazza, V Andrei, ML Andrieux, XS Anduaga, A Angerami, F Anghinolfi, N Anjos, A Annovi, A Antonaki, M Antonelli, S Antonelli, A Antonov, J Antos, F Anulli, S Aoun, L Aperio Bella, R Apolle, G Arabidze, I Aracena, Y Arai, ATH Arce, JP Archambault, S Arfaoui, JF Arguin, E Arik, M Arik, AJ Armbruster, O Arnaez, C Arnault, A Artamonov, G Artoni, D Arutinov, S Asai, R Asfandiyarov, S Ask

Abstract:

A search for contact interactions has been performed using dimuon events recorded with the ATLAS detector in proton-proton collisions at √s=7TeV. The data sample corresponds to an integrated luminosity of 42pb-1. No significant deviation from the standard model is observed in the dimuon mass spectrum, allowing the following 95% C.L. limits to be set on the energy scale of contact interactions: Λ>4.9TeV (4.5 TeV) for constructive (destructive) interference in the left-left isoscalar compositeness model. These limits are the most stringent to date for μμqq contact interactions. 2011 American Physical Society.

Search for supersymmetric particles in events with lepton pairs and large missing transverse momentum in √s = 7 TeV proton-proton collisions with the ATLAS experiment

European Physical Journal C 71:7 (2011) 18-19

Authors:

G Aad, B Abbott, J Abdallah, AA Abdelalim, A Abdesselam, O Abdinov, B Abi, M Abolins, H Abramowicz, H Abreu, E Acerbi, BS Acharya, DL Adams, TN Addy, J Adelman, M Aderholz, S Adomeit, P Adragna, T Adye, S Aefsky, JA Aguilar-Saavedra, M Aharrouche, SP Ahlen, F Ahles, A Ahmad, M Ahsan, G Aielli, T Akdogan, TPA Åkesson, G Akimoto, AV Akimov, A Akiyama, MS Alam, MA Alam, S Albrand, M Aleksa, IN Aleksandrov, F Alessandria, C Alexa, G Alexander, G Alexandre, T Alexopoulos, M Alhroob, M Aliev, G Alimonti, J Alison, M Aliyev, PP Allport, SE Allwood-Spiers, J Almond, A Aloisio, R Alon, A Alonso, MG Alviggi, K Amako, P Amaral, C Amelung, VV Ammosov, A Amorim, G Amorós, N Amram, C Anastopoulos, T Andeen, CF Anders, KJ Anderson, A Andreazza, V Andrei, ML Andrieux, XS Anduaga, A Angerami, F Anghinolfi, N Anjos, A Annovi, A Antonaki, M Antonelli, S Antonelli, A Antonov, J Antos, F Anulli, S Aoun, L Aperio Bella, R Apolle, G Arabidze, I Aracena, Y Arai, ATH Arce, JP Archambault, S Arfaoui, JF Arguin, E Arik, M Arik, AJ Armbruster, O Arnaez, C Arnault, A Artamonov, G Artoni, D Arutinov, S Asai, R Asfandiyarov

Abstract:

Results are presented of searches for the production of supersymmetric particles decaying into final states with missing transverse momentum and exactly two isolated leptons in √s = 7 TeV proton-proton collisions at the Large Hadron Collider. Search strategies requiring lepton pairs with identical-sign or opposite-sign electric charges are described. In a data sample corresponding to an integrated luminosity of 35 pb-1 collected with the ATLAS detector, no significant excesses are observed. Based on specific benchmark models, limits are placed on the squark mass between 450 and 690 GeV for squarks approximately degenerate in mass with gluinos, depending on the supersymmetric mass hierarchy considered. © 2011 CERN for the benefit of the ATLAS collaboration.

Dual baseline search for muon neutrino disappearance at 0.5 eV^2 < \Delta m^2 < 40 eV^2

(2011)

Authors:

MiniBooNE, SciBooNE Collaborations, :, KBM Mahn, Y Nakajima, AA Aguilar-Arevalo, JL Alcaraz-Aunion, CE Anderson, AO Bazarko, SJ Brice, BC Brown, L Bugel, J Cao, J Catala-Perez, G Cheng, L Coney, JM Conrad, DC Cox, A Curioni, R Dharmapalan, Z Djurcic, U Dore, DA Finley, BT Fleming, R Ford, AJ Franke, FG Garcia, GT Garvey, C Giganti, JJ Gomez-Cadenas, J Grange, C Green, JA Green, P Guzowski, A Hanson, TL Hart, E Hawker, Y Hayato, K Hiraide, W Huelsnitz, R Imlay, RA Johnson, BJP Jones, G Jover-Manas, G Karagiorgi, P Kasper, T Katori, YK Kobayashi, T Kobilarcik, I Kourbanis, S Koutsoliotas, H Kubo, Y Kurimoto, EM Laird, SK Linden, JM Link, Y Liu, Y Liu, WC Louis, PF Loverre, L Ludovici, C Mariani, W Marsh, S Masuike, K Matsuoka, C Mauger, VT McGary, G McGregor, W Metcalf, PD Meyers, F Mills, GB Mills, G Mitsuka, Y Miyachi, S Mizugashira, J Monroe, CD Moore, J Mousseau, T Nakaya, R Napora, RH Nelson, P Nienaber, JA Nowak, D Orme, B Osmanov, M Otani, S Ouedraogo, RB Patterson, Z Pavlovic, D Perevalov, CC Polly, E Prebys, JL Raaf, H Ray, BP Roe, AD Russell, F Sanchez, V Sandberg, R Schirato, D Schmitz, MH Shaevitz, T-A Shibata, FC Shoemaker, D Smith, M Soderberg, M Sorel, P Spentzouris, J Spitz, I Stancu, RJ Stefanski, M Sung, H Takei, HA Tanaka, H-K Tanaka, M Tanaka, R Tayloe, IJ Taylor, RJ Tesarek, M Tzanov, Y Uchida, R Van de Water, JJ Walding, MO Wascko, DH White, HB White, MJ Wilking, M Yokoyama, HJ Yang, GP Zeller, ED Zimmerman

Search for a heavy particle decaying into an electron and a muon with the ATLAS detector in sqrt[s] = 7 TeV pp collisions at the LHC.

Phys Rev Lett 106:25 (2011) 251801

Authors:

G Aad, B Abbott, J Abdallah, AA Abdelalim, A Abdesselam, O Abdinov, B Abi, M Abolins, H Abramowicz, H Abreu, E Acerbi, BS Acharya, DL Adams, TN Addy, J Adelman, M Aderholz, S Adomeit, P Adragna, T Adye, S Aefsky, JA Aguilar-Saavedra, M Aharrouche, SP Ahlen, F Ahles, A Ahmad, M Ahsan, G Aielli, T Akdogan, TPA Akesson, G Akimoto, AV Akimov, A Akiyama, MS Alam, MA Alam, S Albrand, M Aleksa, IN Aleksandrov, F Alessandria, C Alexa, G Alexander, G Alexandre, T Alexopoulos, M Alhroob, M Aliev, G Alimonti, J Alison, M Aliyev, PP Allport, SE Allwood-Spiers, J Almond, A Aloisio, R Alon, A Alonso, MG Alviggi, K Amako, P Amaral, C Amelung, VV Ammosov, A Amorim, G Amorós, N Amram, C Anastopoulos, T Andeen, CF Anders, KJ Anderson, A Andreazza, V Andrei, M-L Andrieux, XS Anduaga, A Angerami, F Anghinolfi, N Anjos, A Annovi, A Antonaki, M Antonelli, S Antonelli, A Antonov, J Antos, F Anulli, S Aoun, L Aperio Bella, R Apolle, G Arabidze, I Aracena, Y Arai, ATH Arce, JP Archambault, S Arfaoui, J-F Arguin, E Arik, M Arik, AJ Armbruster, O Arnaez, C Arnault, A Artamonov, G Artoni, D Arutinov, S Asai, R Asfandiyarov, S Ask, B Asman, L Asquith, K Assamagan, A Astbury, A Astvatsatourov, G Atoian, B Aubert, B Auerbach, E Auge, K Augsten, M Aurousseau, N Austin, R Avramidou, D Axen, C Ay, G Azuelos, Y Azuma, MA Baak, G Baccaglioni, C Bacci, AM Bach, H Bachacou, K Bachas, G Bachy, M Backes, M Backhaus, E Badescu, P Bagnaia, S Bahinipati, Y Bai, DC Bailey, T Bain, JT Baines, OK Baker, MD Baker, S Baker, F Baltasar Dos Santos Pedrosa, E Banas, P Banerjee, Sw Banerjee, D Banfi, A Bangert, V Bansal, HS Bansil, L Barak, SP Baranov, A Barashkou, A Barbaro Galtieri, T Barber, EL Barberio, D Barberis, M Barbero, DY Bardin, T Barillari, M Barisonzi, T Barklow, N Barlow, BM Barnett, RM Barnett, A Baroncelli, AJ Barr, F Barreiro, J Barreiro Guimarães da Costa, P Barrillon, R Bartoldus, AE Barton, D Bartsch, V Bartsch, RL Bates, L Batkova, JR Batley, A Battaglia, M Battistin, G Battistoni, F Bauer, HS Bawa, B Beare, T Beau, PH Beauchemin, R Beccherle, P Bechtle, HP Beck, M Beckingham, KH Becks, AJ Beddall, A Beddall, S Bedikian, VA Bednyakov, CP Bee, M Begel, S Behar Harpaz, PK Behera, M Beimforde, C Belanger-Champagne, PJ Bell, WH Bell, G Bella, L Bellagamba, F Bellina, M Bellomo, A Belloni, O Beloborodova, K Belotskiy, O Beltramello, S Ben Ami, O Benary, D Benchekroun, C Benchouk, M Bendel, BH Benedict, N Benekos, Y Benhammou, DP Benjamin, M Benoit, JR Bensinger, K Benslama, S Bentvelsen, D Berge, E Bergeaas Kuutmann, N Berger, F Berghaus, E Berglund, J Beringer, K Bernardet, P Bernat, R Bernhard, C Bernius, T Berry, A Bertin, F Bertinelli, F Bertolucci, MI Besana, N Besson, S Bethke, W Bhimji, RM Bianchi, M Bianco, O Biebel, SP Bieniek, J Biesiada, M Biglietti, H Bilokon, M Bindi, S Binet, A Bingul, C Bini, C Biscarat, U Bitenc, KM Black, RE Blair, J-B Blanchard, G Blanchot, C Blocker, J Blocki, A Blondel, W Blum, U Blumenschein, GJ Bobbink, VB Bobrovnikov, SS Bocchetta, A Bocci, CR Boddy, M Boehler, J Boek, N Boelaert, S Böser, JA Bogaerts, A Bogdanchikov, A Bogouch, C Bohm, V Boisvert, T Bold, V Boldea, M Bona, VG Bondarenko, M Boonekamp, G Boorman, CN Booth, P Booth, S Bordoni, C Borer, A Borisov, G Borissov, I Borjanovic, S Borroni, K Bos, D Boscherini, M Bosman, H Boterenbrood, D Botterill, J Bouchami, J Boudreau, EV Bouhova-Thacker, C Boulahouache, C Bourdarios, N Bousson, A Boveia, J Boyd, IR Boyko, NI Bozhko, I Bozovic-Jelisavcic, J Bracinik, A Braem, P Branchini, GW Brandenburg, A Brandt, G Brandt, O Brandt, U Bratzler, B Brau, JE Brau, HM Braun, B Brelier, J Bremer, R Brenner, S Bressler, D Breton, ND Brett, D Britton, FM Brochu, I Brock, R Brock, TJ Brodbeck, E Brodet, F Broggi, C Bromberg, G Brooijmans, WK Brooks, G Brown, E Brubaker, PA Bruckman de Renstrom, D Bruncko, R Bruneliere, S Brunet, A Bruni, G Bruni, M Bruschi, T Buanes, F Bucci, J Buchanan, NJ Buchanan, P Buchholz, RM Buckingham, AG Buckley, SI Buda, IA Budagov, B Budick, V Büscher, L Bugge, D Buira-Clark, EJ Buis, O Bulekov, M Bunse, T Buran, H Burckhart, S Burdin, T Burgess, S Burke, E Busato, P Bussey, CP Buszello, F Butin, B Butler, JM Butler, CM Buttar, JM Butterworth, W Buttinger, T Byatt, S Cabrera Urbán, D Caforio, O Cakir, P Calafiura, G Calderini, P Calfayan, R Calkins, LP Caloba, R Caloi, D Calvet, S Calvet, R Camacho Toro, A Camard, P Camarri, M Cambiaghi, D Cameron, J Cammin, S Campana, M Campanelli, V Canale, F Canelli, A Canepa, J Cantero, L Capasso, MDM Capeans Garrido, I Caprini, M Caprini, D Capriotti, M Capua, R Caputo, C Caramarcu, R Cardarelli, T Carli, G Carlino, L Carminati, B Caron, S Caron, C Carpentieri, GD Carrillo Montoya, AA Carter, JR Carter, J Carvalho, D Casadei, MP Casado, M Cascella, C Caso, AM Castaneda Hernandez, E Castaneda-Miranda, V Castillo Gimenez, NF Castro, G Cataldi, F Cataneo, A Catinaccio, JR Catmore, A Cattai, G Cattani, S Caughron, D Cauz, A Cavallari, P Cavalleri, D Cavalli, M Cavalli-Sforza, V Cavasinni, A Cazzato, F Ceradini, AS Cerqueira, A Cerri, L Cerrito, F Cerutti, SA Cetin, F Cevenini, A Chafaq, D Chakraborty, K Chan, B Chapleau, JD Chapman, JW Chapman, E Chareyre, DG Charlton, V Chavda, S Cheatham, S Chekanov, SV Chekulaev, GA Chelkov, MA Chelstowska, C Chen, H Chen, L Chen, S Chen, T Chen, X Chen, S Cheng, A Cheplakov, VF Chepurnov, R Cherkaoui El Moursli, V Chernyatin, E Cheu, SL Cheung, L Chevalier, G Chiefari, L Chikovani, JT Childers, A Chilingarov, G Chiodini, MV Chizhov, G Choudalakis, S Chouridou, IA Christidi, A Christov, D Chromek-Burckhart, ML Chu, J Chudoba, G Ciapetti, K Ciba, AK Ciftci, R Ciftci, D Cinca, V Cindro, MD Ciobotaru, C Ciocca, A Ciocio, M Cirilli, M Ciubancan, A Clark, PJ Clark, W Cleland, JC Clemens, B Clement, C Clement, RW Clifft, Y Coadou, M Cobal, A Coccaro, J Cochran, P Coe, JG Cogan, J Coggeshall, E Cogneras, CD Cojocaru, J Colas, AP Colijn, C Collard, NJ Collins, C Collins-Tooth, J Collot, G Colon, G Comune, P Conde Muiño, E Coniavitis, MC Conidi, M Consonni, S Constantinescu, C Conta, F Conventi, J Cook, M Cooke, BD Cooper, AM Cooper-Sarkar, NJ Cooper-Smith, K Copic, T Cornelissen, M Corradi, F Corriveau, A Cortes-Gonzalez, G Cortiana, G Costa, MJ Costa, D Costanzo, T Costin, D Côté, R Coura Torres, L Courneyea, G Cowan, C Cowden, BE Cox, K Cranmer, F Crescioli, M Cristinziani, G Crosetti, R Crupi, S Crépé-Renaudin, C Cuenca Almenar, T Cuhadar Donszelmann, S Cuneo, M Curatolo, CJ Curtis, P Cwetanski, H Czirr, Z Czyczula, S D'Auria, M D'Onofrio, A D'Orazio, A Da Rocha Gesualdi Mello, PVM Da Silva, C Da Via, W Dabrowski, A Dahlhoff, T Dai, C Dallapiccola, SJ Dallison, M Dam, M Dameri, DS Damiani, HO Danielsson, R Dankers, D Dannheim, V Dao, G Darbo, GL Darlea, C Daum, JP Dauvergne, W Davey, T Davidek, N Davidson, R Davidson, M Davies, AR Davison, E Dawe, I Dawson, JW Dawson, RK Daya, K De, R de Asmundis, S De Castro, PE De Castro Faria Salgado, S De Cecco, J de Graat, N De Groot, P de Jong, C De La Taille, H De la Torre, B De Lotto, L De Mora, L De Nooij, M De Oliveira Branco, D De Pedis, P de Saintignon, A De Salvo, U De Sanctis, A De Santo, JB De Vivie De Regie, S Dean, DV Dedovich, J Degenhardt, M Dehchar, M Deile, C Del Papa, J Del Peso, T Del Prete, A Dell'acqua, L Dell'asta, M Della Pietra, D Della Volpe, M Delmastro, P Delpierre, N Delruelle, PA Delsart, C Deluca, S Demers, M Demichev, B Demirkoz, J Deng, SP Denisov, D Derendarz, JE Derkaoui, F Derue, P Dervan, K Desch, E Devetak, PO Deviveiros, A Dewhurst, B Dewilde, S Dhaliwal, R Dhullipudi, A Di Ciaccio, L Di Ciaccio, A Di Girolamo, B Di Girolamo, S Di Luise, A Di Mattia, B Di Micco, R Di Nardo, A Di Simone, R Di Sipio, MA Diaz, F Diblen, EB Diehl, H Dietl, J Dietrich, TA Dietzsch, S Diglio, K Dindar Yagci, J Dingfelder, C Dionisi, P Dita, S Dita, F Dittus, F Djama, R Djilkibaev, T Djobava, MAB do Vale, A Do Valle Wemans, TKO Doan, M Dobbs, R Dobinson, D Dobos, E Dobson, M Dobson, J Dodd, OB Dogan, C Doglioni, T Doherty, Y Doi, J Dolejsi, I Dolenc, Z Dolezal, BA Dolgoshein, T Dohmae, M Donadelli, M Donega, J Donini, J Dopke, A Doria, A Dos Anjos, M Dosil, A Dotti, MT Dova, JD Dowell, AD Doxiadis, AT Doyle, Z Drasal, J Drees, N Dressnandt, H Drevermann, C Driouichi, M Dris, JG Drohan, J Dubbert, T Dubbs, S Dube, E Duchovni, G Duckeck, A Dudarev, F Dudziak, M Dührssen, IP Duerdoth, L Duflot, M-A Dufour, M Dunford, H Duran Yildiz, R Duxfield, M Dwuznik, F Dydak, D Dzahini, M Düren, WL Ebenstein, J Ebke, S Eckert, S Eckweiler, K Edmonds, CA Edwards, W Ehrenfeld, T Ehrich, T Eifert, G Eigen, K Einsweiler, E Eisenhandler, T Ekelof, M El Kacimi, M Ellert, S Elles, F Ellinghaus, K Ellis, N Ellis, J Elmsheuser, M Elsing, R Ely, D Emeliyanov, R Engelmann, A Engl, B Epp, A Eppig, J Erdmann, A Ereditato, D Eriksson, J Ernst, M Ernst, J Ernwein, D Errede, S Errede, E Ertel, M Escalier, C Escobar, X Espinal Curull, B Esposito, F Etienne, AI Etienvre, E Etzion, D Evangelakou, H Evans, L Fabbri, C Fabre, K Facius, RM Fakhrutdinov, S Falciano, AC Falou, Y Fang, M Fanti, A Farbin, A Farilla, J Farley, T Farooque, SM Farrington, P Farthouat, D Fasching, P Fassnacht, D Fassouliotis, B Fatholahzadeh, A Favareto, L Fayard, S Fazio, R Febbraro, P Federic, OL Fedin, I Fedorko, W Fedorko, M Fehling-Kaschek, L Feligioni, D Fellmann, CU Felzmann, C Feng, EJ Feng, AB Fenyuk, J Ferencei, J Ferland, B Fernandes, W Fernando, S Ferrag, J Ferrando, V Ferrara, A Ferrari, P Ferrari, R Ferrari, A Ferrer, ML Ferrer, D Ferrere, C Ferretti, A Ferretto Parodi, M Fiascaris, F Fiedler, A Filipčič, A Filippas, F Filthaut, M Fincke-Keeler, MCN Fiolhais, L Fiorini, A Firan, G Fischer, P Fischer, MJ Fisher, SM Fisher, J Flammer, M Flechl, I Fleck, J Fleckner, P Fleischmann, S Fleischmann, T Flick, LR Flores Castillo, MJ Flowerdew, F Föhlisch, M Fokitis, T Fonseca Martin, DA Forbush, A Formica, A Forti, D Fortin, JM Foster, D Fournier, A Foussat, AJ Fowler, K Fowler, H Fox, P Francavilla, S Franchino, D Francis, T Frank, M Franklin, S Franz, M Fraternali, S Fratina, ST French, R Froeschl, D Froidevaux, JA Frost, C Fukunaga, E Fullana Torregrosa, J Fuster, C Gabaldon, O Gabizon, T Gadfort, S Gadomski, G Gagliardi, P Gagnon, C Galea, EJ Gallas, MV Gallas, V Gallo, BJ Gallop, P Gallus, E Galyaev, KK Gan, YS Gao, VA Gapienko, A Gaponenko, F Garberson, M Garcia-Sciveres, C García, JE García Navarro, RW Gardner, N Garelli, H Garitaonandia, V Garonne, J Garvey, C Gatti, G Gaudio, O Gaumer, B Gaur, L Gauthier, IL Gavrilenko, C Gay, G Gaycken, J-C Gayde, EN Gazis, P Ge, CNP Gee, DAA Geerts, Ch Geich-Gimbel, K Gellerstedt, C Gemme, A Gemmell, MH Genest, S Gentile, M George, S George, P Gerlach, A Gershon, C Geweniger, H Ghazlane, P Ghez, N Ghodbane, B Giacobbe, S Giagu, V Giakoumopoulou, V Giangiobbe, F Gianotti, B Gibbard, A Gibson, SM Gibson, GF Gieraltowski, LM Gilbert, M Gilchriese, V Gilewsky, D Gillberg, AR Gillman, DM Gingrich, J Ginzburg, N Giokaris, R Giordano, FM Giorgi, P Giovannini, PF Giraud, D Giugni, P Giusti, BK Gjelsten, LK Gladilin, C Glasman, J Glatzer, A Glazov, KW Glitza, GL Glonti, J Godfrey, J Godlewski, M Goebel, T Göpfert, C Goeringer, C Gössling, T Göttfert, S Goldfarb, D Goldin, T Golling, SN Golovnia, A Gomes, LS Gomez Fajardo, R Gonçalo, J Goncalves Pinto Firmino Da Costa, L Gonella, A Gonidec, S Gonzalez, S González de la Hoz, ML Gonzalez Silva, S Gonzalez-Sevilla, JJ Goodson, L Goossens, PA Gorbounov, HA Gordon, I Gorelov, G Gorfine, B Gorini, E Gorini, A Gorišek, E Gornicki, SA Gorokhov, VN Goryachev, B Gosdzik, M Gosselink, MI Gostkin, M Gouanère, I Gough Eschrich, M Gouighri, D Goujdami, MP Goulette, AG Goussiou, C Goy, I Grabowska-Bold, V Grabski, P Grafström, C Grah, K-J Grahn, F Grancagnolo, S Grancagnolo, V Grassi, V Gratchev, N Grau, HM Gray, JA Gray, E Graziani, OG Grebenyuk, D Greenfield, T Greenshaw, ZD Greenwood, IM Gregor, P Grenier, E Griesmayer, J Griffiths, N Grigalashvili, AA Grillo, S Grinstein, PLY Gris, YV Grishkevich, J-F Grivaz, J Grognuz, M Groh, E Gross, J Grosse-Knetter, J Groth-Jensen, M Gruwe, K Grybel, VJ Guarino, D Guest, C Guicheney, A Guida, T Guillemin, S Guindon, H Guler, J Gunther, B Guo, J Guo, A Gupta, Y Gusakov, VN Gushchin, A Gutierrez, P Gutierrez, N Guttman, O Gutzwiller, C Guyot, C Gwenlan, CB Gwilliam, A Haas, S Haas, C Haber, R Hackenburg, HK Hadavand, DR Hadley, P Haefner, F Hahn, S Haider, Z Hajduk, H Hakobyan, J Haller, K Hamacher, P Hamal, A Hamilton, S Hamilton, H Han, L Han, K Hanagaki, M Hance, C Handel, P Hanke, CJ Hansen, JR Hansen, JB Hansen, JD Hansen, PH Hansen, P Hansson, K Hara, GA Hare, T Harenberg, D Harper, RD Harrington, OM Harris, K Harrison, J Hartert, F Hartjes, T Haruyama, A Harvey, S Hasegawa, Y Hasegawa, S Hassani, M Hatch, D Hauff, S Haug, M Hauschild, R Hauser, M Havranek, BM Hawes, CM Hawkes, RJ Hawkings, D Hawkins, T Hayakawa, D Hayden, HS Hayward, SJ Haywood, E Hazen, M He, SJ Head, V Hedberg, L Heelan, S Heim, B Heinemann, S Heisterkamp, L Helary, M Heldmann, M Heller, S Hellman, C Helsens, RCW Henderson, M Henke, A Henrichs, AM Henriques Correia, S Henrot-Versille, F Henry-Couannier, C Hensel, T Henss, Y Hernández Jiménez, R Herrberg, AD Hershenhorn, G Herten, R Hertenberger, L Hervas, NP Hessey, A Hidvegi, E Higón-Rodriguez, D Hill, JC Hill, N Hill, KH Hiller, S Hillert, SJ Hillier, I Hinchliffe, E Hines, M Hirose, F Hirsch, D Hirschbuehl, J Hobbs, N Hod, MC Hodgkinson, P Hodgson, A Hoecker, MR Hoeferkamp, J Hoffman, D Hoffmann, M Hohlfeld, M Holder, A Holmes, SO Holmgren, T Holy, JL Holzbauer, Y Homma, L Hooft van Huysduynen, T Horazdovsky, C Horn, S Horner, K Horton, J-Y Hostachy, S Hou, MA Houlden, A Hoummada, J Howarth, DF Howell, I Hristova, J Hrivnac, I Hruska, T Hryn'ova, PJ Hsu, S-C Hsu, GS Huang, Z Hubacek, F Hubaut, F Huegging, TB Huffman, EW Hughes, G Hughes, RE Hughes-Jones, M Huhtinen, P Hurst, M Hurwitz, U Husemann, N Huseynov, J Huston, J Huth, G Iacobucci, G Iakovidis, M Ibbotson, I Ibragimov, R Ichimiya, L Iconomidou-Fayard, J Idarraga, M 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Pastor, J Toth, F Touchard, DR Tovey, D Traynor, T Trefzger, J Treis, L Tremblet, A Tricoli, IM Trigger, S Trincaz-Duvoid, TN Trinh, MF Tripiana, N Triplett, W Trischuk, A Trivedi, B Trocmé, C Troncon, M Trottier-McDonald, A Trzupek, C Tsarouchas, JC-L Tseng, M Tsiakiris, PV Tsiareshka, D Tsionou, G Tsipolitis, V Tsiskaridze, EG Tskhadadze, II Tsukerman, V Tsulaia, J-W Tsung, S Tsuno, D Tsybychev, A Tua, JM Tuggle, M Turala, D Turecek, I Turk Cakir, E Turlay, R Turra, PM Tuts, A Tykhonov, M Tylmad, M Tyndel, H Tyrvainen, G Tzanakos, K Uchida, I Ueda, R Ueno, M Ugland, M Uhlenbrock, M Uhrmacher, F Ukegawa, G Unal, DG Underwood, A Undrus, G Unel, Y Unno, D Urbaniec, E Urkovsky, P Urrejola, G Usai, M Uslenghi, L Vacavant, V Vacek, B Vachon, S Vahsen, C Valderanis, J Valenta, P Valente, S Valentinetti, S Valkar, E Valladolid Gallego, S Vallecorsa, JA Valls Ferrer, H van der Graaf, E van der Kraaij, R Van Der Leeuw, E van der Poel, D van der Ster, B Van Eijk, N van Eldik, P van Gemmeren, Z 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Xie, Y Xie, C Xu, D Xu, G Xu, B Yabsley, M Yamada, A Yamamoto, K Yamamoto, S Yamamoto, T Yamamura, J Yamaoka, T Yamazaki, Y Yamazaki, Z Yan, H Yang, UK Yang, Y Yang, Y Yang, Z Yang, S Yanush, W-M Yao, Y Yao, Y Yasu, GV Ybeles Smit, J Ye, S Ye, M Yilmaz, R Yoosoofmiya, K Yorita, R Yoshida, C Young, S Youssef, D Yu, J Yu, J Yu, L Yuan, A Yurkewicz, VG Zaets, R Zaidan, AM Zaitsev, Z Zajacova, Yo K Zalite, L Zanello, P Zarzhitsky, A Zaytsev, C Zeitnitz, M Zeller, PF Zema, A Zemla, C Zendler, AV Zenin, O Zenin, T Zeniš, Z Zenonos, S Zenz, D Zerwas, G Zevi Della Porta, Z Zhan, D Zhang, H Zhang, J Zhang, X Zhang, Z Zhang, L Zhao, T Zhao, Z Zhao, A Zhemchugov, S Zheng, J Zhong, B Zhou, N Zhou, Y Zhou, CG Zhu, H Zhu, J Zhu, Y Zhu, X Zhuang, V Zhuravlov, D Zieminska, R Zimmermann, S Zimmermann, S Zimmermann, M Ziolkowski, R Zitoun, L Zivković, VV Zmouchko, G Zobernig, A Zoccoli, Y Zolnierowski, A Zsenei, M Zur Nedden, V Zutshi, L Zwalinski, ATLAS Collaboration

Abstract:

This Letter presents the first search for a heavy particle decaying into an e ± μ(-/+) final state in sqrt[s] = 7 TeV pp collisions at the LHC. The data were recorded by the ATLAS detector during 2010 and correspond to a total integrated luminosity of 35 pb(-1). No excess above the standard model background expectation is observed. Exclusions at 95% confidence level are placed on two representative models. In an R-parity violating supersymmetric model, tau sneutrinos with a mass below 0.75 TeV are excluded, assuming all R-parity violating couplings are zero except λ(311)' = 0.11 and λ312 = 0.07. In a lepton flavor violating model, a Z'-like vector boson with masses of 0.70-1.00 TeV and corresponding cross sections times branching ratios of 0.175-0.183 pb is excluded. These results extend to higher mass R-parity violating sneutrinos and lepton flavor violating Z's than previous constraints from the Tevatron.

Search for new heavy particles decaying to ZZ→llll, lljj in pp̄ collisions at s=1.96TeV

Physical Review D - Particles, Fields, Gravitation and Cosmology 83:11 (2011)

Authors:

T Aaltonen, B Álvarez González, S Amerio, D Amidei, A Anastassov, A Annovi, J Antos, G Apollinari, JA Appel, A Apresyan, T Arisawa, A Artikov, J Asaadi, W Ashmanskas, B Auerbach, A Aurisano, F Azfar, W Badgett, A Barbaro-Galtieri, VE Barnes, BA Barnett, P Barria, P Bartos, M Bauce, G Bauer, F Bedeschi, D Beecher, S Behari, G Bellettini, J Bellinger, D Benjamin, A Beretvas, A Bhatti, M Binkley, D Bisello, I Bizjak, KR Bland, B Blumenfeld, A Bocci, A Bodek, D Bortoletto, J Boudreau, A Boveia, B Brau, L Brigliadori, A Brisuda, C Bromberg, E Brucken, M Bucciantonio, J Budagov, HS Budd, S Budd, K Burkett, G Busetto, P Bussey, A Buzatu, C Calancha, S Camarda, M Campanelli, M Campbell, F Canelli, A Canepa, B Carls, D Carlsmith, R Carosi, S Carrillo, S Carron, B Casal, M Casarsa, A Castro, P Catastini, D Cauz, V Cavaliere, M Cavalli-Sforza, A Cerri, L Cerrito, YC Chen, M Chertok, G Chiarelli, G Chlachidze, F Chlebana, K Cho, D Chokheli, JP Chou, WH Chung, YS Chung, CI Ciobanu, MA Ciocci, A Clark, G Compostella, ME Convery, J Conway, M Corbo, M Cordelli, CA Cox, DJ Cox, F Crescioli, C Cuenca Almenar, J Cuevas, R Culbertson

Abstract:

We report on a search for anomalous production of Z boson pairs through a massive resonance decay in data corresponding to 2.5-2.9fb-1 of integrated luminosity in pp̄ collisions at √s=1.96TeV using the CDF II detector at the Fermilab Tevatron. This analysis, with more data and channels where the Z bosons decay to muons or jets, supersedes the 1.1fb-1 four-electron channel result previously published by CDF. In order to maintain high efficiency for muons, we use a new forward tracking algorithm and muon identification requirements optimized for these high signal-to-background channels. Predicting the dominant backgrounds in each channel entirely from sideband data samples, we observe four-body invariant mass spectra above 300GeV/c2 that are consistent with background. We set limits using the acceptance for a massive graviton resonance that are 7-20 times stronger than the previously published direct limits on resonant ZZ diboson production. © 2011 American Physical Society.