Astrophysics: Cosmic explosions in the young Universe.

Nature 491:7423 (2012) 205-206

Search for a heavy top-quark partner in final states with two leptons with the ATLAS detector at the LHC

JOURNAL OF HIGH ENERGY PHYSICS (2012) ARTN 094

Authors:

G Aad, T Abajyan, B Abbott, J Abdallah, S Abdel Khalek, AA Abdelalim, O Abdinov, R Aben, B Abi, M Abolins, OS AbouZeid, H Abramowicz, H Abreu, E Acerbia, BS Acharya, L Adamczyk, DL Adams, TN Addy, J Adelman, S Adomeit, P Adragna, T Adye, S Aefsky, JA Aguilar-Saavedra, M Agustoni, M Aharrouche, SP Ahlen, F Ahles, A Ahmad, M Ahsan, G Aielli, T Akdogan, TPA Akesson, G Akimoto, AV Akimov, MS Alam, MA Alam, J Albert, S Albrand, M Aleksa, IN Aleksandrov, F Alessandria, C Alexa, G Alexander, G Alexandre, T Alexopoulos, M Alhroob, M Aliev, G Alimonti, J Alison, BMM Allbrooke, PP Allport, SE Allwood-Spiers, J Almond, A Aloisio, R Alon, A Alonso, F Alonso, B Alvarez Gonzalez, MG Alviggi, K Amako, C Amelung, VV Ammosov, A Amorim, N Amram, C Anastopoulos, LS Ancu, N Andari, T Andeen, CF Anders, G Anders, KJ Anderson, A Andreazza, V Andrei, XS Anduaga, P Anger, A Angerami, F Anghinolfi, A Anisenkov, N Anjos, A Annovi, A Antonaki, M Antonelli, A Antonov, J Antos, F Anulli, M Aoki, S Aoun, L Aperio Bella, R Apolle, G Arabidze, I Aracena, Y Arai, ATH Arce, S Arfaoui, J-F Arguin, E Arik, M Arik, AJ Armbruster, O Arnaez, V Arnal, C Arnault, A Artamonov, G Artoni, D Arutinov, S Asai, R Asfandiyarov, S Ask, B Asman, L Asquith, K Assamagan, A Astbury, M Atkinson, B Aubert, E Auge, K Augsten, M Aurousseau, G Avolio, R Avramidou, D Axen, G Azuelos, Y Azuma, MA Baak, G Baccaglioni, C Bacci, AM Bach, H Bachacou, K Bachas, M Backes, M Backhaus, E Badescu, P Bagnaia, S Bahinipati, Y Bai, DC Bailey, T Bain, JT Baines, OK Baker, MD Baker, S Baker, E Banas, P Banerjee, Sw Banerjee, D Banfi, A Bangert, V Bansal, HS Bansil, L Barak, SP Baranov, 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, G Barone, AJ Barr, F Barreiro, J Barreiro Guimaraes Da Costa, P Barrillon, R Bartoldus, AE Barton, V Bartsch, A Basye, RL Bates, L Batkova, JR Batley, A Battaglia, M Battistin, F Bauer, HS Bawa, S Beale, T Beau, PH Beauchemin, R Beccherle, P Bechtle, HP Beck, AK Becker, S Becker, M Beckingham, KH Becks, AJ Beddall, A Beddall, S Bedikian, VA Bednyakov, CP Bee, LJ Beemster, M Begel, S Behar Harpaz, 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, O Benary, D Benchekroun, K Bendtz, N Benekos, Y Benhammou, E Benhar Noccioli, JA Benitez Garcia, DP Benjamin, M Benoit, JR Bensinger, K Benslama, S Bentvelsen, D Berge, E Bergeaas Kuutmann, N Berger, F Berghaus, E Berglund, J Beringer, P Bernat, R Bernhard, C Bernius, T Berry, C Bertella, A Bertin, F Bertolucci, MI Besana, GJ Besjes, N Besson, S Bethke, W Bhimji, RM Bianchi, M Bianco, O Biebel, SP Bieniek, K Bierwagen, J Biesiada, M Biglietti, H Bilokon, M Bindi, S Binet, A Bingul, C Bini, C Biscarat, B Bittner, KM Black, RE Blair, J-B Blanchard, G Blanchot, T Blazek, 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, JA Bogaerts, A Bogdanchikov, A Bogouch, C Bohm, J Bohm, V Boisvert, T Bold, V Boldea, NM Bolnet, M Bomben, M Bona, M Boonekamp, CN Booth, S Bordoni, C Borer, A Borisov, G Borissov, I Borjanovic, M Borri, S Borroni, V Bortolotto, K Bos, D Boscherini, M Bosman, H Boterenbrood, J Bouchami, J Boudreau, EV Bouhova-Thacker, D Boumediene, C Bourdarios, N Bousson, A Boveia, J Boyd, IR Boyko, I Bozovic-Jelisavcic, J Bracinik, P Branchini, A Brandt, G Brandt, O Brandt, U Bratzler, B Brau, JE Brau, HM Braun, SF Brazzale, B Brelier, J Bremer, K Brendlinger, R Brenner, S Bressler, D Britton, FM Brochu, I Brock, R Brock, F Broggi, C Bromberg, J Bronner, G Brooijmans, T Brooks, WK Brooks, G Brown, H Brown, PA Bruckman De Renstrom, D Bruncko, R Bruneliere, S Brunet, A Bruni, G Bruni, M Bruschi, T Buanes, Q Buat, F Bucci, J Buchanan, P Buchholz, RM Buckingham, AG Buckley, SI Buda, IA Budagov, B Budick, V Buscher, L Bugge, O Bulekov, AC Bundock, M Bunse, T Buran, H Burckhart, S Burdin, T Burgess, S Burke, E Busato, P Bussey, CP Buszello, B Butler, JM Butler, CM Buttar, JM Butterworth, W Buttinger, S Cabrera Urban, D Caforio, O Cakir, P Calafiura, G Calderini, P Calfayan, R Calkins, LP Caloba, R Caloi, D Calvet, S Calvet, R Camacho Toro, P Camarri, D Cameron, LM Caminada, R Caminal Armadans, S Campana, M Campanelli, V Canale, F Canellig, A Canepa, J Cantero, R Cantrill, L Capasso, MDM Capeans Garrido, I Caprini, M Caprini, D Capriotti, M Capua, R Caputo, R Cardarelli, T Carli, G Carlino, L Carminati, B Caron, S Caron, E Carquin, 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, P Catastini, A Catinaccio, JR Catmore, A Cattai, G Cattani, S Caughron, V Cavaliere, P Cavalleri, D Cavalli, M Cavalli-Sforza, V Cavasinni, F Ceradini, AS Cerqueira, A Cerri, L Cerrito, F Cerutti, SA Cetin, A Chafaq, D Chakraborty, I Chalupkova, K Chan, P Chang, B Chapleau, JD Chapman, JW Chapman, E Chareyre, DG Charlton, V Chavda, CA Chavez Barajas, S Cheatham, S Chekanov, SV Chekulaev, GA Chelkov, MA Chelstowska, C Chen, H Chen, S Chen, X Chen, Y Chen, A Cheplakov, R Cherkaoui El Moursli, V Chernyatin, E Cheu, SL Cheung, L Chevalier, G Chiefari, L Chikovani, JT Childers, A Chilingarov, G Chiodini, AS Chisholm, RT Chislett, A Chitan, MV Chizhov, G Choudalakis, S Chouridou, IA Christidi, A Christov, D Chromek-Burckhart, ML Chu, J Chudoba, G Ciapetti, AK Ciftci, R Ciftci, D Cinca, V Cindro, C Ciocca, A Ciocio, M Cirilli, P Cirkovic, M Citterio, M Ciubancan, A Clark, PJ Clark, RN Clarke, W Cleland, JC Clemens, B Clement, C Clement, Y Coadou, M Cobal, A Coccaro, J Cochran, JG Cogan, J Coggeshall, E Cogneras, J Colas, S Cole, AP Colijn, NJ Collins, C Collins-Tooth, J Collot, T Colombo, G Colon, P Conde Muino, E Coniavitis, MC Conidi, SM Consonni, V Consorti, S Constantinescu, C Conta, G Conti, F Conventi, M Cooke, BD Cooper, AM Cooper-Sarkar, K Copic, T Cornelissen, M Corradi, F Corriveau, A Cortes-Gonzalez, G Cortiana, G Costa, MJ Costa, D Costanzo, D Cote, L Courneyea, G Cowan, C Cowden, BE Cox, K Cranmer, F Crescioli, M Cristinziani, G Crosetti, S Crepe-Renaudin, C-M Cuciuc, C Cuenca Almenar, T Cuhadar Donszelmann, M Curatolo, CJ Curtis, C Cuthbert, P Cwetanski, H Czirr, P Czodrowski, Z Czyczula, S D'Auria, M D'Onofrio, A D'Orazio, MJ Da Cunha Sargedas De Sousa, C Da Via, W Dabrowski, A Dafinca, T Dai, C Dallapiccola, M Dam, M Dameri, DS Damiani, HO Danielsson, V Dao, G Darbo, GL Darlea, JA Dassoulas, W Davey, T Davidek, N Davidson, R Davidson, E Davies, M Davies, O Davignon, AR Davison, Y Davygora, E Dawe, I Dawson, RK Daya-Ishmukhametova, K De, R de Asmundis, S De Castro, S De Cecco, J de Graat, N De Groot, P de Jong, C De la Taille, H De la Torre, F De Lorenzi, L de Mora, L De Nooij, D De Pedis, A De Salvo, U De Sanctis, A De Santo, JB De Vivie De Regie, G De Zorzi, WJ Dearnaley, R Debbe, C Debenedetti, B Dechenaux, DV Dedovich, J Degenhardt, C Del Papa, J Del Peso, T Del Prete, T Delemontex, M Deliyergiyev, A Dell'Acqua, L Dell'Asta, M Della Pietra, D della Volpe, M Delmastro, 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, EB Diehl, J Dietrich, TA Dietzsch, S Diglio, K Dindar Yagci, J Dingfelder, F Dinut, C Dionisi, P Dita, S Dita, F Dittus, F Djama, T Djobava, MAB do Vale, A Do Valle Wemans, TKO Doan, M Dobbs, R Dobinson, D Dobos, E Dobson, J Dodd, C Doglioni, T Doherty, Y Doi, J Dolejsi, I Dolenc, Z Dolezal, BA Dolgoshein, T Dohmae, M Donadelli, J Donini, J Dopke, A Doria, A Dos Anjos, A Dotti, MT Dova, AD Doxiadis, AT Doyle, M Dris, J Dubbert, S Dube, E Duchovni, G Duckeck, D Duda, A Dudarev, F Dudziak, MD Uhrssen, IP Duerdoth, L Duflot, M-A Dufour, L Duguid, M Dunford, H Duran Yildiz, R Duxfield, M Dwuznik, F Dydak, M Duren, J Ebke, S Eckweiler, K Edmonds, W Edson, CA Edwards, NC Edwards, W Ehrenfeld, 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, D Emeliyanov, R Engelmann, A Engl, B Epp, J Erdmann, A Ereditato, D Eriksson, J Ernst, M Ernst, J Ernwein, D Errede, S Errede, E Ertel, M Escalier, H Esch, C Escobar, X Espinal Curull, B Esposito, F Etienne, AI Etienvre, E Etzion, D Evangelakou, H Evans, L Fabbri, C Fabre, RM Fakhrutdinov, S Falciano, Y Fang, M Fanti, A Farbin, A Farilla, J Farley, T Farooque, S Farrell, SM Farrington, P Farthouat, F Fassi, P Fassnacht, D Fassouliotis, B Fatholahzadeh, A Favareto, L Fayard, S Fazio, R Febbraro, P Federic, OL Fedin, W Fedorko, M Fehling-Kaschek, L Feligioni, D Fellmann, C Feng, EJ Feng, AB Fenyuk, J Ferencei, W Fernando, S Ferrag, J Ferrando, V Ferrara, A Ferrari, P Ferrari, R Ferrari, DE Ferreira de Lima, A Ferrer, D Ferrere, C Ferretti, A Ferretto Parodi, M Fiascaris, F Fiedler, A Filipcic, F Filthaut, M Fincke-Keeler, MCN Fiolhais, L Fiorini, A Firan, G Fischer, MJ Fisher, M Flechl, I Fleck, J Fleckner, P Fleischmann, S Fleischmann, T Flick, A Floderus, LR Flores Castillo, MJ Flowerdew, T Fonseca Martin, A Formica, A Forti, D Fortin, D Fournier, H Fox, P Francavilla, M Franchini, S Franchino, D Francis, T Frank, S Franz, M Fraternali, S Fratina, ST French, C Friedrich, F Friedrich, R Froeschl, D Froidevaux, JA Frost, C Fukunaga, E Fullana Torregrosa, BG Fulsom, J Fuster, C Gabaldon, O Gabizon, T Gadfort, S Gadomski, G Gagliardi, P Gagnon, C Galea, EJ Gallas, V Gallo, BJ Gallop, P Gallus, KK Gan, YS Gao, A Gaponenko, F Garberson, M Garcia-Sciveres, C Garc, JE Garcia Navarro, RW Gardner, N Garelli, H Garitaonandia, V Garonne, C Gatti, G Gaudio, B Gaur, L Gauthier, P Gauzzi, IL Gavrilenko, C Gay, G Gaycken, EN Gazis, P Ge, Z Gecse, 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, N Ghodbane, B Giacobbe, S Giagu, V Giakoumopoulou, V Giangiobbe, F Gianotti, B Gibbard, A Gibson, SM Gibson, D Gillberg, AR Gillman, DM Gingrich, J Ginzburg, N Giokaris, MP Giordani, R Giordano, FM Giorgi, P Giovannini, PF Giraud, D Giugni, M Giunta, P Giusti, BK Gjelsten, LK Gladilin, C Glasman, J Glatzer, A Glazov, KW Glitza, GL Glonti, JR Goddard, J Godfrey, J Godlewski, M Goebel, T Goepfert, C Goeringer, C Goessling, S Goldfarb, T Golling, A Gomes, LS Gomez Fajardo, R Goncalo, J Goncalves Pinto Firmino Da Costa, L Gonella, S Gonzalez, S Gonzalez de la Hoz, G Gonzalez Parra, ML Gonzalez Silva, S Gonzalez-Sevilla, JJ Goodson, L Goossens, PA Gorbounov, HA Gordon, I Gorelov, G Gorfine, B Gorini, E Gorini, A Gorisek, E Gornicki, B Gosdzik, AT Goshaw, M Gosselink, MI Gostkin, I Gough Eschrich, M Gouighri, D Goujdami, MP Goulette, AG Goussiou, C Goy, S Gozpinar, I Grabowska-Bold, P Grafstrom, K-J Grahn, F Grancagnolo, S Grancagnolo, V Grassi, V Gratchev, N Grau, HM Gray, JA Gray, E Graziani, OG Grebenyuk, T Greenshaw, ZD Greenwood, K Gregersen, IM Gregor, P Grenier, J Griffiths, N Grigalashvili, AA Grillo, S Grinstein, Ph Gris, YV Grishkevich, J-F Grivaz, E Gross, J Grosse-Knetter, J Groth-Jensen, K Grybel, D Guest, C Guicheney, S Guindon, U Gul, H Guler, J Gunther, B Guo, J Guo, P Gutierrez, N Guttman, O Gutzwiller, C Guyot, C Gwenlan, CB Gwilliam, A Haas, S Haas, C Haber, HK Hadavand, DR Hadley, P Haefner, F Hahn, S Haider, Z Hajduk, H Hakobyan, D Hall, J Haller, K Hamacher, P Hamal, M Hamer, A Hamilton, S Hamilton, D Fortin, D Fournier, H Fox, P Francavilla, M Franchini, S Franchino, D Francis, T Frank, S Franz, M Fraternali, S Fratina, ST French, C Friedrich, F Friedrich, R Froeschl, D Froidevaux, JA Frost, C Fukunaga, E Fullana Torregrosa, BG Fulsom, J Fuster, C Gabaldon, O Gabizon, T Gadfort, S Gadomski, G Gagliardi, P Gagnon, C Galea, EJ Gallas, V Gallo, BJ Gallop, P Gallus, KK Gan, YS Gao, A Gaponenko, F Garberson, M Garcia-Sciveres, C Garcia, JE Garcia Navarro, RW Gardner, N Garelli, H Garitaonandia, V Garonne, C Gatti, G Gaudio, B Gaur, L Gauthier, P Gauzzi, IL Gavrilenko, C Gay, G Gaycken, EN Gazis, P Ge, Z Gecse, 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, N Ghodbane, B Giacobbe, S Giagu, V Giakoumopoulou, V Giangiobbe, F Gianotti, B Gibbard, A Gibson, SM Gibson, D Gillberg, AR Gillman, DM Gingrich, J Ginzburg, N Giokaris, MP Giordani, R Giordano, FM Giorgi, P Giovannini, PF Giraud, D Giugni, M Giunta, P Giusti, BK Gjelsten, LK Gladilin, C Glasman, J Glatzer, A Glazov, KW Glitza, GL Glonti, JR Goddard, J Godfrey, J Godlewski, M Goebel, T Gopfert, C Goeringer, C Gossling, S Goldfarb, T Golling, A Gomes, LS Gomez Fajardo, R Goncalo, J Goncalves Pinto Firmino Da Costa, L Gonella, S Gonzalez, S Gonzalez de la Hoz, G Gonzalez Parra, ML Gonzalez Silva, S Gonzalez-Sevilla, JJ Goodson, L Goossens, PA Gorbounov, HA Gordon, I Gorelov, G Gorfine, B Gorini, E Gorini, A Gorisek, E Gornicki, B Gosdzik, AT Goshaw, M Gosselink, MI Gostkin, I Gough Eschrich, M Gouighri, D Goujdami, MP Goulette, AG Goussiou, C Goy, S Gozpinar, I Grabowska-Bold, P Grafstrom, K-J Grahn, F Grancagnolo, S Grancagnolo, V Grassi, V Gratchev, N Grau, HM Gray, JA Gray, E Graziani, OG Grebenyuk, T Greenshaw, ZD Greenwood, K Gregersen, IM Gregor, P Grenier, J Griffiths, N Grigalashvili, AA Grillo, S Grinstein, Ph Gris, YV Grishkevich, J-F Grivaz, E Gross, J Grosse-Knetter, J Groth-Jensen, K Grybel, D Guest, C Guicheney, S Guindon, U Gul, H Guler, J Gunther, B Guo, J Guo, P Gutierrez, N Guttman, O Gutzwiller, C Guyot, C Gwenlan, CB Gwilliam, A Haas, S Haas, C Haber, HK Hadavand, DR Hadley, P Haefner, F Hahn, S Haider, Z Hajduk, H Hakobyan, D Hall, J Haller, K Hamacher, P Hamal, M Hamer, A Hamilton, S Hamilton, L Han, K Hanagaki, K Hanawa, M Hance, C Handel, P Hanke, JR Hansen, JB Hansen, JD Hansen, PH Hansen, P Hansson, K Hara, GA Hare, T Harenberg, S Harkusha, D Harper, RD Harrington, OM Harris, J Hartert, F Hartjes, T Haruyama, A Harvey, S Hasegawa, Y Hasegawa, S Hassani, S Haug, M Hauschild, R Hauser, M Havranek, CM Hawkes, RJ Hawkings, AD Hawkins, D Hawkins, T Hayakawa, T Hayashi, D Hayden, CP Hays, HS Hayward, SJ Haywood, M He, SJ Head, V Hedberg, L Heelan, S Heim, B Heinemann, S Heisterkamp, L Helary, C Heller, M Heller, S Hellman, D Hellmich, C Helsens, RCW Henderson, M Henke, A Henrichs, AM Henriques Correia, S Henrot-Versille, C Hensel, T Henss, CM Hernandez, Y Hernandez Jimenez, R Herrberg, G Herten, R Hertenberger, L Hervas, GG Hesketh, NP Hessey, E Higon-Rodriguez, JC 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, SO Holmgren, T Holy, JL Holzbauer, TM Hong, L Hooft van Huysduynen, S Horner, J-Y Hostachy, S Hou, A Hoummada, J Howard, J Howarth, I Hristova, J Hrivnac, T Hryn'ova, PJ Hsu, S-C Hsu, D Hu, Z Hubacek, F Hubaut, F Huegging, A Huettmann, TB Huffman, EW Hughes, G Hughes, M Huhtinen, M Hurwitz, U Husemann, N Huseynov, J Huston, J Huth, G Iacobucci, G Iakovidis, M Ibbotson, I Ibragimov, L Iconomidou-Fayard, J Idarraga, P Iengo, O Igonkina, Y Ikegami, M Ikeno, D Iliadis, N Ilic, T Ince, J Inigo-Golfin, P Ioannou, M Iodice, K Iordanidou, V Ippolito, A Irles Quiles, C Isaksson, M Ishino, M Ishitsuka, R Ishmukhametov, C Issever, S Istin, AV Ivashin, W Iwanski, H Iwasaki, JM Izen, V Izzo, B Jackson, JN Jackson, P Jackson, MR Jaekel, V Jain, K Jakobs, S Jakobsen, T Jakoubek, J Jakubek, DK Jana, E Jansen, H Jansen, A Jantsch, M Janus, G Jarlskog, L Jeanty, I Jen-La Plante, D Jennens, P Jenni, AE 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Measurement of the t-channel single top-quark production cross section in pp collisions at √s=7 TeV with the ATLAS detector

Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 717:4-5 (2012) 330-350

Authors:

G Aad, B Abbott, J Abdallah, S Abdel Khalek, AA Abdelalim, A Abdesselam, O Abdinov, B Abi, M Abolins, OS AbouZeid, H Abramowicz, H Abreu, E Acerbi, E Acerbi, BS Acharya, BS Acharya, L Adamczyk, 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, G Aielli, T Akdogan, TPA Åkesson, G Akimoto, AV Akimov, A Akiyama, MS Alam, MA Alam, J Albert, 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, BMM Allbrooke, PP Allport, SE Allwood-Spiers, J Almond, A Aloisio, A Aloisio, R Alon, A Alonso, B Alvarez Gonzalez, MG Alviggi, MG Alviggi, K Amako, P Amaral, C Amelung, VV Ammosov, A Amorim, G Amorós, N Amram, C Anastopoulos, LS Ancu, N Andari, T Andeen, CF Anders, G Anders, KJ Anderson, A Andreazza, A Andreazza, V Andrei, ML Andrieux, XS Anduaga, A Angerami, F Anghinolfi, A Anisenkov, N Anjos, A Annovi, A Antonaki, M Antonelli, A Antonov, J Antos, F Anulli, S Aoun, L Aperio Bella, R Apolle, G Arabidze, I Aracena, Y Arai

Abstract:

We report a measurement of the cross section of single top-quark production in the t-channel using 1.04 fb-1 of pp collision data at s=7 TeV recorded with the ATLAS detector at the LHC. Selected events feature one electron or muon, missing transverse momentum, and two or three jets, exactly one of them identified as originating from a b quark. The cross section is measured by fitting the distribution of a multivariate discriminant constructed with a neural network, yielding σt=83±4(stat.)-19 +20(syst.) pb, which is in good agreement with the prediction of the Standard Model. Using the ratio of the measured to the theoretically predicted cross section and assuming that the top-quark-related CKM matrix elements obey the relation |Vtb|≫|Vts|, |Vtd|, the coupling strength at the W-t-b vertex is determined to be |Vtb|=1.13-0.13 +0.14. If it is assumed that |Vtb|≤1 a lower limit of |Vtb|>0.75 is obtained at the 95% confidence level. © 2012 CERN.

Novel inclusive search for the Higgs boson in the four-lepton final state at CDF

Physical Review D - Particles, Fields, Gravitation and Cosmology 86:7 (2012)

Authors:

T Aaltonen, B Alvarez González, S Amerio, D Amidei, A Anastassov, A Annovi, J Antos, G Apollinari, JA Appel, T Arisawa, A Artikov, J Asaadi, W Ashmanskas, B Auerbach, A Aurisano, F Azfar, W Badgett, T Bae, A Barbaro-Galtieri, VE Barnes, BA Barnett, P Barria, P Bartos, M Bauce, F Bedeschi, S Behari, G Bellettini, J Bellinger, D Benjamin, A Beretvas, A Bhatti, D Bisello, I Bizjak, KR Bland, B Blumenfeld, A Bocci, A Bodek, D Bortoletto, J Boudreau, A Boveia, L Brigliadori, C Bromberg, E Brucken, J Budagov, HS Budd, K Burkett, G Busetto, P Bussey, A Buzatu, A Calamba, C Calancha, S Camarda, M Campanelli, M Campbell, F Canelli, 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, WH Chung, YS Chung, MA Ciocci, A Clark, C Clarke, G Compostella, ME Convery, J Conway, M Corbo, M Cordelli, CA Cox, DJ Cox, F Crescioli, J Cuevas, R Culbertson, D Dagenhart, N D'ascenzo, M Datta, P De Barbaro, M Dell'orso, L Demortier, M Deninno, F Devoto, M D'errico

Abstract:

An inclusive search for the standard model Higgs boson using the four-lepton final state in proton-antiproton collisions produced by the Tevatron at √s=1.96TeV is conducted. The data are recorded by the CDF II detector and correspond to an integrated luminosity of 9.7fb -1. Three distinct Higgs decay modes, namely ZZ, WW, and ττ, are simultaneously probed. Nine potential signal events are selected and found to be consistent with the background expectation. We set a 95% credibility limit on the production cross section times the branching ratio and subsequent decay to the four-lepton final state for hypothetical Higgs boson masses between 120GeV/c2 and 300GeV/c2. © 2012 American Physical Society.

Search for charge-asymmetric production of W' bosons in tt+jet events from pp collisions at √s=7 TeV

Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 717:4-5 (2012) 351-370

Authors:

S Chatrchyan, V Khachatryan, AM Sirunyan, A Tumasyan, W Adam, T Bergauer, M Dragicevic, J Erö, C Fabjan, M Friedl, R Frühwirth, VM Ghete, J Hammer, N Hörmann, J Hrubec, M Jeitler, W Kiesenhofer, V Knünz, M Krammer, D Liko, I Mikulec, M Pernicka, B Rahbaran, C Rohringer, H Rohringer, R Schöfbeck, J Strauss, A Taurok, P Wagner, W Waltenberger, G Walzel, E Widl, CE Wulz, V Mossolov, N Shumeiko, J Suarez Gonzalez, S Bansal, T Cornelis, EA De Wolf, X Janssen, S Luyckx, T Maes, L Mucibello, S Ochesanu, B Roland, R Rougny, M Selvaggi, Z Staykova, H Van Haevermaet, P Van Mechelen, N Van Remortel, A Van Spilbeeck, F Blekman, S Blyweert, J D'Hondt, R Gonzalez Suarez, A Kalogeropoulos, M Maes, A Olbrechts, W Van Doninck, P Van Mulders, GP Van Onsem, I Villella, B Clerbaux, G De Lentdecker, V Dero, APR Gay, T Hreus, A Léonard, PE Marage, T Reis, L Thomas, C Vander Velde, P Vanlaer, J Wang, V Adler, K Beernaert, A Cimmino, S Costantini, G Garcia, M Grunewald, B Klein, J Lellouch, A Marinov, J Mccartin, AA Ocampo Rios, D Ryckbosch, N Strobbe, F Thyssen, M Tytgat, P Verwilligen, S Walsh, E Yazgan, N Zaganidis, S Basegmez, G Bruno, R Castello, A Caudron, L Ceard, C Delaere

Abstract:

A search is presented for charge-asymmetric production of a W' boson that has been proposed to accommodate the forward-backward asymmetry observed in the production of top-antitop quark pairs at the Tevatron. The new heavy W' boson would be produced in association with a top quark and would decay into top and down quarks. The data correspond to an integrated luminosity of 5.0 fb-1 in pp collisions at a center-of-mass energy of 7 TeV, recorded by the CMS detector at the LHC. No significant excess above the standard model expectations is observed, and, from a combination of the electron-plus-jets and muon-plus-jets channels, a 95% confidence level lower limit of 840 GeV/c2 is set on the W' boson mass for a W' boson model with values for coupling constants to top and down quarks gL=0 and gR=2. In addition, a kinematic reconstruction of the W' resonance mass using the inherent charge asymmetry of this model finds no indication of the presence of W' events in the data. © 2012 CERN.