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Insertion of STC into TRT at the Department of Physics, Oxford
Credit: CERN

Professor Chris Hays

Professor of Physics

Research theme

  • Fundamental particles and interactions

Sub department

  • Particle Physics

Research groups

  • ATLAS
Chris.Hays@physics.ox.ac.uk
Telephone: 01865 (2)73355
Denys Wilkinson Building, room 675
  • About
  • Research
  • Publications

Evidence of color coherence effects in W plus jets events from p(p)over-bar collisions at √s=1.8 TeV

PHYSICS LETTERS B 464:1-2 (1999) 145-155

Authors:

B Abbott, M Abolins, V Abramov, BS Acharya, I Adam, DL Adams, M Adams, S Ahn, V Akimov, GA Alves, N Amos, EW Anderson, MM Baarmand, VV Babintsev, L Babukhadia, A Baden, B Baldin, S Banerjee, J Bantly, E Barberis, P Baringer, JF Bartlett, A Belyaev, SB Beri, I Bertram, VA Bezzubov, PC Bhat, V Bhatnagar, M Bhattacharjee, G Blazey, S Blessing, P Bloom, A Boehnlein, NI Bojko, F Borcherding, C Boswell, A Brandt, R Breedon, G Briskin, R Brock, A Bross, D Buchholz, VS Burtovoi, JM Butler, W Carvalho, D Casey, Z Casilum, H Castilla-Valdez, D Chakraborty, KM Chan, SV Chekulaev, W Chen, DK Cho, S Choi, S Chopra, BC Choudhary, JH Christenson, M Chung, D Claes, AR Clark, WG Cobau, J Cochran, L Coney, WE Cooper, D Coppage, C Cretsinger, D Cullen-Vidal, MAC Cummings, D Cutts, OI Dahl, K Davis, K De, K Del Signore, M Demarteau, D Denisov, SP Denisov, HT Diehl, M Diesburg, G Di Loreto, P Draper, Y Ducros, LV Dudko, SR Dugad, A Dyshkant, D Edmunds, J Ellison, VD Elvira, R Engelmann, S Eno, G Eppley, P Ermolov, OV Eroshin, J Estrada, H Evans, VN Evdokimov, T Fahland, MK Fatyga, S Feher, D Fein, T Ferbel, HE Fisk, Y Fisyak, E Flattum, GE Forden, M Fortner, KC Frame, S Fuess, E Gallas, AN Galyaev, P Gartung, V Gavrilov, TL Geld, RJ Genik, K Genser, CE Gerber, Y Gershtein, B Gibbard, G Ginther, B Gobbi, B Gómez, G Gómez, PI Goncharov, JLG Solís, H Gordon, LT Goss, K Gounder, A Goussiou, N Graf, PD Grannis, DR Green, JA Green, H Greenlee, S Grinstein, P Grudberg, S Grünendahl, G Guglielmo, JA Guida, JM Guida, A Gupta, SN Gurzhiev, G Gutierrez, P Gutierrez, NJ Hadley, H Haggerty, S Hagopian, V Hagopian, KS Hahn, RE Hall, P Hanlet, S Hansen, JM Hauptman, C Hays, C Hebert, D Hedin, AP Heinson, U Heintz, R Hernández-Montoya, T Heuring, R Hirosky, JD Hobbs, B Hoeneisen, JS Hoftun, F Hsieh, T Hu, AS Ito, J Jaques, SA Jerger, R Jesik, T Joffe-Minor, K Johns, M Johnson, A Jonckheere, M Jones, H Jöstlein, SY Jun, S Kahn, D Karmanov, D Karmgard, R Kehoe, SK Kim, B Klima, C Klopfenstein, B Knuteson, W Ko, JM Kohli, D Koltick, AV Kostritskiy, J Kotcher, AV Kotwal, AV Kozelov, EA Kozlovsky, J Krane, MR Krishnaswamy, S Krzywdzinski, M Kubantsev, S Kuleshov, Y Kulik, S Kunori, F Landry, G Landsberg, A Leflat, J Li, QZ Li, JGR Lima, D Lincoln, SL Linn, J Linnemann, R Lipton, JG Lu, A Lucotte, L Lueking, AKA Maciel, RJ Madaras, R Madden, L Magaña-Mendoza, V Manankov, S Mani, HS Mao, R Markeloff, T Marshall, MI Martin, RD Martin, KM Mauritz, B May, AA Mayorov, R McCarthy, J McDonald, T McKibben, J McKinley, T McMahon, HL Melanson, M Merkin, KW Merritt, C Miao, H Miettinen, A Mincer, CS Mishra, N Mokhov, NK Mondal, HE Montgomery, M Mostafa, H da Motta, F Nang, M Narain, VS Narasimham, A Narayanan, HA Neal, JP Negret, P Nemethy, D Norman, L Oesch, V Oguri, N Oshima, D Owen, P Padley, A Para, N Parashar, YM Park, R Partridge, N Parua, M Paterno, B Pawlik, J Perkins, M Peters, R Piegaia, H Piekarz, Y Pischalnikov, BG Pope, HB Prosper, S Protopopescu, J Qian, PZ Quintas, R Raja, S Rajagopalan, O Ramirez, NW Reay, S Reucroft, M Rijssenbeek, T Rockwell, M Roco, P Rubinov, R Ruchti, J Rutherfoord, A Sánchez-Hernández, A Santoro, L Sawyer, RD Schamberger, H Schellman, J Sculli, E Shabalina, C Shaffer, HC Shankar, RK Shivpuri, D Shpakov, M Shupe, RA Sidwell, H Singh, JB Singh, V Sirotenko, P Slattery, E Smith, RP Smith, R Snihur, GR Snow, J Snow, S Snyder, J Solomon, XF Song, M Sosebee, N Sotnikova, M Souza, NR Stanton, G Steinbrück, RW Stephens, ML Stevenson, F Stichelbaut, D Stoker, V Stolin, DA Stoyanova, M Strauss, K Streets, M Strovink, A Sznajder, P Tamburello, J Tarazi, M Tartaglia, TLT Thomas, J Thompson, D Toback, TG Trippe, PM Tuts, V Vaniev, N Varelas, EW Varnes, AA Volkov, AP Vorobiev, HD Wahl, J Warchol, G Watts, M Wayne, H Weerts, A White, JT White, JA Wightman, S Willis, SJ Wimpenny, JVD Wirjawan, J Womersley, DR Wood, R Yamada, P Yamin, T Yasuda, P Yepes, K Yip, C Yoshikawa, S Youssef, J Yu, Y Yu, M Zanabria, Z Zhou, ZH Zhu, M Zielinski, D Zieminska, A Zieminski, V Zutshi, EG Zverev, Z Zylberstejn
More details from the publisher

Search for R-Parity violating supersymmetry in the dielectron channel

PHYSICAL REVIEW LETTERS 83:22 (1999) 4476-4481

Authors:

B Abbott, M Abolins, V Abramov, BS Acharya, I Adams, DL Adams, M Adams, S Ahn, V Akimov, GA Alves, N Amos, EW Anderson, MM Baarmand, VV Babintsev, L Babukhadia, A Baden, B Baldin, S Banerjee, J Bantly, E Barberis, P Baringer, JF Bartlett, A Belyaev, SB Beri, I Bertram, VA Bezzubov, PC Bhat, V Bhatnagar, M Bhattacharjee, G Blazey, S Blessing, P Bloom, A Boehnlein, NI Bojko, F Borcherding, C Boswell, A Brandt, R Breedon, G Briskin, R Brock, A Bross, D Buchholz, VS Burtovoi, JM Butler, W Carvalho, D Casey, Z Casilum, H Castilla-Valdez, D Chakraborty, SV Chekulaev, W Chen, S Choi, S Chopra, BC Choudhary, JH Christenson, M Chung, D Claes, AR Clark, WG Cobau, J Cochran, L Coney, WE Cooper, D Coppage, C Cretsinger, D Cullen-Vidal, MAC Cummings, D Cutts, OI Dahl, K Davis, K De, K Del Signore, M Demarteau, D Denisov, SP Denisov, HT Diehl, M Diesburg, G Di Loreto, P Draper, Y Ducros, LV Dudko, SR Dugad, A Dyshkant, D Edmunds, J Ellison, VD Elvira, R Engelmann, S Eno, G Eppley, P Ermolov, OV Eroshin, H Evans, VN Evdokimov, T Fahland, MK Fatyga, S Feher, D Fein, T Ferbel, HE Fisk, Y Fisyak, E Flattum, GE Forden, M Fortner, KC Frame, S Fuess, E Gallas, AN Galyaev, P Gartung, V Gavrilov, TL Geld, RJ Genik, K Genser, CE Gerber, Y Gershtein, B Gibbard, B Gobbi, B Gómez, G Gómez, PI Goncharov, JLG Solís, H Gordon, LT Goss, K Gounder, A Goussiou, N Graf, PD Grannis, DR Green, JA Green, H Greenlee, S Grinstein, P Grudberg, S Grünendahl, G Guglielmo, JA Guida, JM Guida, A Gupta, SN Gurzhiev, G Gutierrez, P Gutierrez, NJ Hadley, H Haggerty, S Hagopian, V Hagopian, KS Hahn, RE Hall, P Hanlet, S Hansen, JM Hauptman, C Hays, C Hebert, D Hedin, AP Heinson, U Heintz, R Hernández-Montoya, T Heuring, R Hirosky, JD Hobbs, B Hoeneisen, JS Hoftun, F Hsieh, T Hu, AS Ito, SA Jerger, R Jesik, T Joffe-Minor, K Johns, M Johnson, A Jonckheere, M Jones, H Jöstlein, SY Jun, CK Jung, S Kahn, D Karmanov, D Karmgard, R Kehoe, SK Kim, B Klima, C Klopfenstein, B Knuteson, W Ko, JM Kohli, D Koltick, AV Kostritskiy, J Kotcher, AV Kotwal, AV Kozelov, EA Kozlovsky, J Krane, MR Krishnaswamy, S Krzywdzinski, M Kubantsev, S Kuleshov, Y Kulik, S Kunori, F Landry, G Landsberg, A Leflat, J Li, QZ Li, JGR Lima, D Lincoln, SL Linn, J Linnemann, R Lipton, A Lucotte, L Lueking, AKA Maciel, RJ Madaras, R Madden, L Magaña-Mendoza, V Manankov, S Mani, HS Mao, R Markeloff, T Marshall, MI Martin, RD Martin, KM Mauritz, B May, AA Mayorov, R McCarthy, J McDonald, T McKibben, J McKinley, T McMahon, HL Melanson, M Merkin, KW Merritt, C Miao, H Miettinen, A Mincer, CS Mishra, N Mokhov, NK Mondal, HE Montgomery, N Mostafa, W da Motta, C Murphy, F Nang, M Narain, VS Narasimham, A Narayanan, HA Neal, JP Negret, P Nemethy, D Norman, L Oesch, V Oguri, N Oshima, D Owen, P Padley, A Para, N Parashar, YM Park, R Partridge, N Parua, M Paterno, B Pawlik, J Perkins, M Peters, R Piegaia, H Piekarz, Y Pischalnikov, BG Pope, HB Prosper, S Protopopescu, J Qian, PZ Quintas, R Raja, S Rajagopalan, O Ramirez, NW Reay, S Reucroft, M Rijssenbeek, T Rockwell, M Roco, P Rubinov, R Ruchti, J Rutherfoord, A Sánchez-Hernández, A Santoro, L Sawyer, RD Schamberger, H Schellman, J Sculli, B Shabalina, C Shaffer, HC Shankar, RK Shivpuri, D Shpakov, M Shupe, RA Sidwell, H Singh, JB Singh, V Sirotenko, E Smith, RP Smith, R Snihur, GR Snow, J Snow, S Snyder, J Solomon, M Sosebee, N Sotnikova, M Souza, NR Stanton, G Steinbrück, RW Stephens, ML Stevenson, E Stichelbaut, D Stoker, V Stolin, DA Stoyanova, M Strauss, K Streets, M Strovink, A Sznajder, P Tamburello, J Tarazi, M Tartaglia, TLT Thomas, J Thompson, D Toback, TG Trippe, PM Tuts, V Vaniev, N Varelas, EW Varnes, AA Volkov, AP Vorobiev, HD Wahl, J Warchol, G Watts, M Wayne, W Weerts, A White, JT White, JA Wightman, S Willis, SJ Wimpenny, JVD Wirjawan, J Womersley, DR Wood, R Yamada, P Yamin, T Yasuda, P Yepes, K Yip, C Yoshikawa, S Youssef, J Yu, Y Yu, Z Zhou, ZH Zhu, M Zielinski, D Zieminska, A Zieminski, V Zutshi, EG Zverev, A Zylberstejn
More details from the publisher

Search for second generation leptoquark pairs decaying to μν plus jets in p(p)over-bar collisions at √s=1.8 TeV

PHYSICAL REVIEW LETTERS 83:15 (1999) 2896-2901

Authors:

B Abbott, M Abolins, V Abramov, BS Acharya, I Adam, DL Adams, M Adams, S Ahn, V Akimov, GA Alves, N Amos, EW Anderson, MM Baarmand, VV Babintsev, L Babukhadia, A Baden, B Baldin, S Banerjee, J Bantly, E Barberis, P Baringer, JF Bartlett, A Belyaev, SB Beri, I Bertram, VA Bezzubov, PC Bhat, V Bhatnagar, H Bhattacharjee, N Biswas, G Blazey, S Blessing, P Bloom, A Boehnlein, NI Bojko, F Borcherding, C Boswell, A Brandt, R Breedon, G Briskin, R Brock, A Bross, D Buchholz, VS Burtovoi, JM Butler, W Carvalho, D Casey, Z Casilum, H Castilla-Valdez, D Chakraborty, SV Chekulaev, W Chen, S Choi, S Chopra, BC Choudhary, JH Christenson, M Chung, D Claes, AR Clark, WG Cobau, J Cochran, L Coney, WE Cooper, D Coppage, C Cretsinger, D Cullen-Vidal, MAC Cummings, D Cutts, OI Dahl, K Davis, K De, K Del Signore, M Demarteau, D Denisov, SP Denisov, HT Diehl, M Diesburg, G Di Loreto, P Draper, Y Ducros, LV Dudko, SR Dugad, A Dyshkant, D Edmunds, J Ellison, VD Elvira, R Engelmann, S Eno, G Eppley, P Ermolov, OV Eroshin, H Evans, VN Evdokimov, T Fahland, MK Fatyga, S Feher, D Fein, T Ferbel, HE Fisk, Y Fisyak, E Flattum, GE Forden, M Fortner, KC Frame, S Fuess, E Gallas, AN Galyaev, P Gartung, V Gavrilov, TL Geld, RJ Genik, K Genser, CE Gerber, Y Gershtein, B Gibbard, B Gobbi, B Gómez, G Gómez, PI Goncharov, JLG Solís, H Gordon, LT Goss, K Gounder, A Goussiou, N Graf, PD Grannis, DR Green, JA Green, H Greenlee, S Grinstein, P Grudberg, S Grünendahl, G Guglielmo, JA Guida, JM Guida, A Gupta, SN Gurzhiev, G Gutierrez, P Gutierrez, NJ Hadley, H Haggerty, S Hagopian, V Hagopian, KS Hahn, RE Hall, P Hanlet, S Hansen, JM Hauptman, C Hays, C Hebert, D Hedin, AP Heinson, U Heintz, R Hernández-Montoya, T Heuring, R Hirosky, J Hobbs, B Hoeneisen, JS Hoftun, F Hsieh, T Hu, AS Ito, SA Jerger, R Jesik, T Joffe-Minor, K Johns, M Johnson, A Jonckheere, M Jones, H Jöstlein, SY Jun, CK Jung, S Kahn, D Karmanov, D Karmgard, R Kehoe, SK Kim, B Klima, C Klopfenstein, B Knuteson, W Ko, JM Kohli, D Koltick, AV Kostritskiy, J Kotcher, AV Kotwal, AV Kozelov, EA Kozlovsky, J Krane, MR Krishnaswamy, S Krzywdzinski, M Kubantsev, S Kuleshov, Y Kulik, S Kunori, F Landry, G Landsberg, A Leflat, J Li, QZ Li, JGR Lima, D Lincoln, SL Linn, J Linnemann, R Lipton, A Lucotte, L Lueking, AL Lyon, AKA Maciel, RJ Madaras, R Madden, L Magaña-Mendoza, V Manankov, S Mani, HS Mao, R Markeloff, T Marshall, MI Martin, RD Martin, KM Mauritz, B May, AA Mayorov, R McCarthy, J McDonald, T McKibben, J McKinley, T McMahon, HL Melanson, M Merkin, KW Merritt, C Miao, H Miettinen, A Mincer, CS Mishra, N Mokhov, NK Mondal, HE Montgomery, P Mooney, M Mostafa, H da Motta, C Murphy, F Nang, M Narain, VS Narasimham, A Narayanan, HA Neal, JP Negret, P Nemethy, D Norman, L Oesch, V Oguri, N Oshima, D Owen, P Padley, A Para, N Parashar, YM Park, R Partridge, N Parua, M Paterno, B Pawlik, J Perkins, M Peters, R Piegaia, H Piekarz, Y Pischalnikov, BG Pope, HB Prosper, S Protopopescu, J Qian, PZ Quintas, R Raja, S Rajagopalan, O Ramirez, NW Reay, S Reucroft, M Rijssenbeek, T Rockwell, M Roco, P Rubinov, R Ruchti, J Rutherfoord, A Sánchez-Hernández, A Santoro, L Sawyer, RD Schamberger, H Schellman, J Sculli, E Shabalina, C Shaffer, HC Shankar, RK Shivpuri, D Shpakov, M Shupe, RA Sidwell, H Singh, JB Singh, V Sirotenko, E Smith, RP Smith, R Snihur, GR Snow, J Snow, S Snyder, J Solomon, M Sosebee, N Sotnikova, M Souza, NR Stanton, G Steinbrück, RW Stephens, ML Stevenson, F Stichelbaut, D Stoker, V Stolin, DA Stoyanova, M Strauss, K Streets, M Strovink, A Sznajder, P Tamburello, J Tarazi, M Tartaglia, TLT Thomas, J Thompson, D Toback, TG Trippe, PM Tuts, V Vaniev, N Varelas, EW Varnes, AA Volkov, AP Vorobiev, HD Wahl, G Wang, J Warchol, G Watts, M Wayne, H Weerts, A White, JT White, JA Wightman, S Willis, SJ Wimpenny, JVD Wirjawan, J Womersley, DR Wood, R Yamada, P Yamin, T Yasuda, P Yepes, K Yip, C Yoshikawa, S Youssef, J Yu, Y Yu, B Zhang, Z Zhou, ZH Zhu, H Zielinski, D Zieminska, A Zieminski, V Zutshi, EG Zverev, A Zylberstejn
More details from the publisher

Studies of WW and WZ production and limits on anomalous WWγ and WWZ couplings -: art. no. 072002

PHYSICAL REVIEW D 60:7 (1999) ARTN 072002

Authors:

B Abbott, M Abolins, V Abramov, BS Acharya, I Adam, DL Adams, M Adams, S Ahn, V Akimov, GA Alves, N Amos, EW Anderson, MM Baarmand, VV Babintsev, L Babukhadia, A Baden, B Baldin, S Banerjee, J Bantly, E Barberis, P Baringer, JF Bartlett, A Belyaev, SB Beri, I Bertram, VA Bezzubov, PC Bhat, V Bhatnagar, M Bhattacharjee, N Biswas, G Blazey, S Blessing, P Bloom, A Boehnlein, NI Bojko, F Borcherding, C Boswell, A Brandt, R Breedon, G Briskin, R Brock, A Bross, D Buchholz, VS Burtovoi, JM Butler, W Carvalho, D Casey, Z Casilum, H Castilla-Valdez, D Chakraborty, SV Chekulaev, W Chen, S Choi, S Chopra, BC Choudhary, JH Christenson, M Chung, D Claes, AR Clark, WG Cobau, J Cochran, L Coney, WE Cooper, D Coppage, C Cretsinger, D Cullen-Vidal, MAC Cummings, D Cutts, OI Dahl, K Davis, K De, K Del Signore, M Demarteau, D Denisov, SP Denisov, HT Diehl, M Diesburg, G Di Loreto, P Draper, Y Ducros, LV Dudko, SR Dugad, A Dyshkant, D Edmunds, J Ellison, VD Elvira, R Engelmann, S Eno, G Eppley, P Ermolov, OV Eroshin, H Evans, VN Evdokimov, T Fahland, MK Fatyga, S Feher, D Fein, T Ferbel, HE Fisk, Y Fisyak, E Flattum, GE Forden, M Fortner, KC Frame, S Fuess, E Gallas, AN Galyaev, P Gartung, V Gavrilov, TL Geld, RJ Genik, K Genser, CE Gerber, Y Gershtein, B Gibbard, B Gobbi, B Gómez, G Gómez, PI Goncharov, JLG Solís, H Gordon, LT Goss, K Gounder, A Goussiou, N Graf, PD Grannis, DR Green, JA Green, H Greenlee, S Grinstein, P Grudberg, S Grünendahl, G Guglielmo, JA Guida, JM Guida, A Gupta, SN Gurzhiev, G Gutierrez, P Gutierrez, NJ Hadley, H Haggerty, S Hagopian, V Hagopian, KS Hahn, RE Hall, P Hanlet, S Hansen, JM Hauptman, C Hays, C Hebert, D Hedin, AP Heinson, U Heintz, R Hernández-Montoya, T Heuring, R Hirosky, JD Hobbs, B Hoeneisen, JS Hoftun, F Hsieh, T Hu, AS Ito, SA Jerger, R Jesik, T Joffe-Minor, K Johns, M Johnson, A Jonckheere, M Jones, H Jöstlein, SY Jun, CK Jung, S Kahn, D Karmanov, D Karmgard, R Kehoe, SK Kim, B Klima, C Klopfenstein, W Ko, JM Kohli, D Koltick, AV Kostritskiy, J Kotcher, AV Kotwal, AV Kozelov, EA Kozlovsky, J Krane, MR Krishnaswamy, S Krzywdzinski, M Kubantsev, S Kuleshov, Y Kulik, S Kunori, F Landry, G Landsberg, A Leflat, J Li, QZ Li, JGR Lima, D Lincoln, SL Linn, J Linnemann, R Lipton, A Lucotte, L Lueking, AL Lyon, AKA Maciel, RJ Madaras, R Madden, L Magaña-Mendoza, V Manankov, S Mani, HS Mao, R Markeloff, T Marshall, MI Martin, RD Martin, KM Mauritz, B May, AA Mayorov, R McCarthy, J McDonald, T McKibben, J McKinley, T McMahon, HL Melanson, M Merkin, KW Merritt, C Miao, H Miettinen, A Mincer, CS Mishra, N Mokhov, NK Mondal, HE Montgomery, P Mooney, M Mostafa, H da Motta, C Murphy, F Nang, M Narain, VS Narasimham, A Narayanan, HA Neal, JP Negret, P Nemethy, D Norman, L Oesch, V Oguri, N Oshima, D Owen, P Padley, A Para, N Parashar, YM Park, R Partridge, N Parua, M Paterno, B Pawlik, J Perkins, M Peters, R Piegaia, H Piekarz, Y Pischalnikov, BG Pope, HB Prosper, S Protopopescu, J Qian, PZ Quintas, R Raja, S Rajagopalan, O Ramirez, NW Reay, S Reucroft, M Rijssenbeek, T Rockwell, M Roco, P Rubinov, R Ruchti, J Rutherfoord, A Sánchez-Hernández, A Santoro, L Sawyer, RD Schamberger, H Schellman, J Sculli, E Shabalina, C Shaffer, HC Shankar, RK Shivpuri, D Shpakov, M Shupe, RA Sidwell, H Singh, JB Singh, V Sirotenko, E Smith, RP Smith, R Snihur, GR Snow, J Snow, S Snyder, J Solomon, M Sosebee, N Sotnikova, M Souza, NR Stanton, G Steinbrück, RW Stephens, ML Stevenson, F Stichelbaut, D Stoker, V Stolin, DA Stoyanova, M Strauss, K Streets, M Strovink, A Sznajder, P Tamburello, J Tarazi, M Tartaglia, TLT Thomas, J Thompson, D Toback, TG Trippe, PM Tuts, V Vaniev, N Varelas, EW Varnes, AA Volkov, AP Vorobiev, HD Wahl, G Wang, J Warchol, G Watts, M Wayne, H Weerts, A White, JT White, JA Wightman, S Willis, SJ Wimpenny, JVD Wirjawan, J Womersley, DR Wood, R Yamada, P Yamin, T Yasuda, P Yepes, K Yip, C Yoshikawa, S Youssef, J Yu, Y Yu, B Zhang, Z Zhou, ZH Zhu, M Zielinski, D Zieminska, A Zieminski, V Zutshi, EG Zverev, A Zylberstejn
More details from the publisher

A search for ttbar resonances in the lepton plus jets final state with ATLAS using 4.7 fb^{-1} of pp collisions at sqrt{s} = 7 TeV

Abstract:

A search for new particles that decay into top quark pairs (ttbar) is performed with the ATLAS experiment at the LHC using an integrated luminosity of 4.7 fb^-1 of proton-proton (pp) collision data collected at a center-of-mass energy sqrt(s)=7 TeV. In the ttbar --> WbWb decay, the lepton plus jets final state is used, where one W boson decays leptonically and the other hadronically. The ttbar system is reconstructed using both small-radius and large-radius jets, the latter being supplemented by a jet substructure analysis. A search for local excesses in the number of data events compared to the Standard Model expectation in the ttbar invariant mass spectrum is performed. No evidence for a ttbar resonance is found and 95% credibility-level limits on the production rate are determined for massive states predicted in two benchmark models. The upper limits on the cross section times branching ratio of a narrow Z' resonance range from 5.1 pb for a boson mass of 0.5 TeV to 0.03 pb for a mass of 3 TeV. A narrow leptophobic topcolor Z' resonance with a mass below 1.74 TeV is excluded. Limits are also derived for a broad color-octet resonance with Gamma/m = 15.3%. A Kaluza-Klein excitation of the gluon in a Randall-Sundrum model is excluded for masses below 2.07 TeV.
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