Search for color singlet technicolor particles in pp¯ Collisions at √s = 1.8TeV

Physical Review Letters 84:6 (2000) 1110-1115

Authors:

T Affolder, H Akimoto, A Akopian, MGG Albrow, P Amaral, SR Amendolia, D Amidei, K Anikeev, J Antos, G Apollinari, T Arisawa, T Asakawa, W Ashmanskas, M Atac, F Azfar, P Azzi-Bacchetta, N Bacchetta, MW Bailey, S Bailey, P De Barbaro, A Barbaro-Galtieri, VE Barnes, BA Barnett, M Barone, G Bauer, F Bedeschi, S Belforte, G Bellettini, J Bellinger, D Benjamin, J Bensinger, A Beretvas, JP Berge, J Berryhill, S Bertolucci, B Bevensee, A Bhatti, C Bigongiari, M Binkley, D Bisello, RE Blair, C Blocker, K Bloom, B Blumenfeld, BS Blusk, A Bocci, A Bodek, W Bokhari, G Bolla, Y Bonushkin, D Bortoletto, J Boudreau, A Brandl, S van den Brink, C Bromberg, M Brozovic, N Bruner, E Buckley-Geer, J Budagov, HS Budd, K Burkett, G Busetto, A Byon-Wagner, KL Byrum, M Campbell, A Caner, W Carithers, J Carlson, D Carlsmith, J Cassada, A Castro, D Cauz, A Cerri, AW Chan, PS Chang, PT Chang, J Chapman, C Chen, YC Chen, MT Cheng, M Chertok, G Chiarelli, I Chirikov-Zorin, G Chlachidze, F Chlebana, L Christofek, ML Chu, S Cihangir, CI Ciobanu, AG Clark, M Cobal, E Cocca, A Connolly, J Conway, J Cooper, M Cordelli, D Costanzo, J Cranshaw, D Cronin-Hennessy, R Cropp

Abstract:

We search for color singlet technirho and technipion production in pp¯ Collisions at √s = 1.8TeVrecorded with the Collider Detector at Fermilab. These exotic technimesons are present in a model of walking technicolor. The signatures studied are lepton plus two jets plus ET and multijet final states. No excess of events is seen in either final state. We set an upper limit on the technirho production cross section and exclude a region in the technipion mass versus technirho mass plane. © 2000 American Physical Society.

Search for contact interactions in deep inelastic e+p → e+X scattering at HERA

European Physical Journal C 14:2 (2000) 239-254

Authors:

J Breitweg, S Chekanov, M Derrick, D Krakauer, S Magill, B Musgrave, A Pellegrino, J Repond, R Stanek, R Yoshida, MCK Mattingly, G Abbiendi, F Anselmo, P Antonioli, G Bari, M Basile, L Bellagamba, D Boscherini, A Bruni, G Bruni, G Cara Romeo, G Castellini, L Cifarelli, F Cindolo, A Contin, N Coppola, M Corradi, S de Pasquale, P Giusti, G Iacobucci, G Laurenti, G Levi, A Margotti, T Massam, R Nania, F Palmonari, A Pesci, A Polini, G Sartorelli, YZ Garcia, A Zichichi, C Amelung, A Bornheim, I Brock, K Coböken, J Crittenden, R Deffner, M Eckert, H Hartmann, K Heinloth, L Heinz, E Hilger, HP Jakob, A Kappes, UF Katz, R Kerger, E Paul, M Pfeiffer, J Rautenberg, H Schnurbusch, A Stifutkin, J Tandler, A Weber, H Wieber, DS Bailey, O Barret, WN Cottingham, B Foster, GP Heath, HF Heath, JD McFall, D Piccioni, J Scott, RJ Tapper, M Capua, A Mastroberardino, M Schioppa, G Susinno, HY Jeoung, JY Kim, JH Lee, IT Lim, KJ Ma, MY Pac, A Caldwell, N Cartiglia, Z Jing, W Liu, B Mellado, JA Parsons, S Ritz, R Sacchi, S Sampson, F Sciulli, Q Zhu, P Borzemski, J Chwastowski, A Eskreys, J Figiel, K Klimek

Abstract:

In a search for signatures of physics processes beyond the Standard Model, various eeqq vector contact-interaction hypotheses have been tested using the high-Q2 deep inelastic neutral-current e+p scattering data collected with the ZEUS detector at HERA. The data correspond to an integrated luminosity of 47.7pb-1 of e+p interactions at 300 GeV center-of-mass energy. No significant evidence of a contact-interaction signal has been found. Limits at the 95% confidence level are set on the contact-interaction amplitudes. The effective mass scales Λ corresponding to these limits range from 1.7 TeV to 5 TeV for the contact-interaction scenarios considered.

Search for resonances decaying to e+-jet in e+p interactions at HERA

European Physical Journal C 16:2 (2000) 253-267

Authors:

J Breitweg, S Chekanov, M Derrick, D Krakauer, S Magill, B Musgrave, A Pellegrino, J Repond, R Stanek, R Yoshida, MCK Mattingly, G Abbiendi, F Anselmo, P Antonioli, G Bari, M Basile, L Bellagamba, D Boscherini, A Bruni, G Bruni, G Cara Romeo, G Castellini, L Cifarelli, F Cindolo, A Contin, N Coppola, M Corradi, S De Pasquale, P Giusti, G Iacobucci, G Laurenti, G Levi, A Margotti, T Massam, R Nania, F Palmonari, A Pesci, A Polini, G Sartorelli, Y Zamora Garcia, A Zichichi, C Amelung, A Bornheim, I Brock, K Coböken, J Crittenden, R Deffner, H Hartmann, K Heinloth, E Hilger, P Irrgang, HP Jakob, A Kappes, UF Katz, R Kerger, E Paul, H Schnurbusch, A Stifutkin, J Tandler, KC Voss, A Weber, H Wieber, DS Bailey, O Barret, NH Brook, B Foster, GP Heath, HF Heath, JD McFall, D Piccioni, E Rodrigues, J Scott, RJ Tapper, M Capua, A Mastroberardino, M Schioppa, G Susinno, HY Jeoung, JY Kim, JH Lee, IT Lim, KJ Ma, MY Pac, A Caldwell, W Liu, X Liu, B Mellado, S Paganis, R Sacchi, S Sampson, F Sciulli, J Chwastowski, A Eskreys, J Figiel, K Klimek, K Olkiewicz, K Piotrzkowski, MB Przybycień, P Stopa, L Zawiejski

Abstract:

The e+-jet invariant mass spectrum produced in the reaction e+p → e+ X has been studied at a center-of-mass energy of 300 GeV. The data were collected using the ZEUS detector operating at the HERA collider, and correspond to an integrated luminosity of 47.7 pb-1. The observed mass spectrum is in good agreement with Standard Model expectations up to an e+-jet mass of 210 GeV. Above this mass, some excess is seen. The angular distribution of these events is typical of high-Q2 neutral current events and does not give convincing evidence for the presence of a narrow scalar or vector state. Limits are presented on the product of cross section and branching ratio for such a state and are interpreted as limits on leptoquark or R-parity-violating squark production. Specific leptoquark types are ruled out at 95% confidence level for coupling strength λ = 0.3 for masses between 150 and 280 GeV.

W production and the search for events with an isolated high-energy lepton and missing transverse momentum at HERA

PHYSICS LETTERS B 471:4 (2000) 411-428

Authors:

J Breitweg, S Chekanov, M Derrick, D Krakauer, S Magill, B Musgrave, A Pellegrino, J Repond, R Stanek, R Yoshida, MCK Mattingly, G Abbiendi, F Anselmo, P Antonioli, G Bari, M Basile, L Bellagamba, D Boscherini, A Bruni, G Bruni, GC Romeo, G Castellini, L Cifarelli, F Cindolo, A Contin, N Coppola, M Corradi, S De Pasquale, P Giusti, G Iacobucci, G Laurenti, G Levi, A Margotti, T Massam, R Nania, F Palmonari, A Pesci, A Polini, G Sartorelli, YZ Garcia, A Zichichi, C Amelung, A Bornheim, I Brock, K Coböken, J Crittenden, R Deffner, M Eckert, H Hartmann, K Heinloth, E Hilger, HP Jakob, A Kappes, UF Katz, R Kerger, E Paul, J Rautenberg, H Schnurbusch, A Stifutkin, J Tandler, A Weber, H Wieber, DS Bailey, O Barret, WN Cottingham, B Foster, GP Heath, HF Heath, JD McFall, D Piccioni, J Scott, RJ Tapper, M Capua, A Mastroberardino, M Schioppa, G Susinno, HY Jeoung, JY Kim, JH Lee, IT Lim, KJ Ma, MY Pac, A Caldwell, N Cartiglia, Z Jing, W Liu, B Mellado, JA Parsons, S Ritz, R Sacchi, S Sampson, F Sciulli, Q Zhu, J Chwastowski, A Eskreys, J Figiel, K Klimek, K Olkiewicz, MB Przybycien, P Stopa, L Zawiejski, L Adamczyk, B Bednarek, K Jelen, D Kisielewska, AM Kowal, T Kowalski, M Przybycien, E Rulikowska-Zarebska, L Suszycki, J Zajac, Z Dulinski, A Kotanski, LAT Bauerdick, U Behrens, JK Bienlein, C Burgard, K Desler, G Drews, A Fox-Murphy, U Fricke, F Goebel, P Göttlicher, R Graciani, T Haas, W Hain, GF Hartner, D Hasell, K Hebbel, KF Johnson, M Kasemann, W Koch, U Kötz, H Kowalski, L Lindemann, B Löhr, M Martínez, J Milewski, M Milite, T Monteiro, M Moritz, D Notz, F Pelucchi, K Piotrzkowski, M Rohde, PRB Saull, AA Savin, U Schneekloth, O Schwarzer, F Selonke, M Sievers, S Stonjek, E Tassi, G Wolf, U Wollmer, C Youngman, W Zeuner, BD Burow, C Coldewey, HJ Grabosch, ALD Viani, A Meyer, K Mönig, S Schlenstedt, PB Straub, G Barbagli, E Gallo, P Pelfer, G Maccarrone, L Votano, A Bamberger, S Eisenhardt, P Markun, H Raach, S Wölfle, NH Brook, PJ Bussey, AT Doyle, SW Lee, N Macdonald, GJ McCance, DH Saxon, LE Sinclair, IO Skillicorn, E Strickland, R Waugh, I Bohnet, N Gendner, U Holm, A Meyer-Larsen, H Salehi, K Wick, A Garfagnini, I Gialas, LK Gladilin, D Kçira, R Klanner, E Lohrmann, G Poelz, F Zetsche, TC Bacon, JE Cole, G Howell, L Lamberti, KR Long, DB Miller, A Prinias, JK Sedgbeer, D Sideris, AD Tapper, R Walker, U Mallik, SM Wang, P Cloth, D Filges, T Ishii, M Kuze, I Suzuki, K Tokushuku, S Yamada, K Yamauchi, Y Yamazaki, SH Ahn, SH An, SJ Hong, SB Lee, SW Nam, SK Park, H Lim, IH Park, D Son, F Barreiro, JP Fernández, G García, C Glasman, JM Hernández, L Labarga, J del Peso, J Puga, I Redondo, J Terrón, F Corriveau, DS Hanna, J Hartmann, WN Murray, A Ochs, S Padhi, M Riveline, DG Stairs, M St-Laurent, M Wing, T Tsurugai, V Bashkirov, BA Dolgoshein, GL Bashindzhagyan, PF Ermolov, YA Golubkov, LA Khein, NA Korotkova, IA Korzhavina, VA Kuzmin, OY Lukina, AS Proskuryakov, LM Shcheglova, AN Solomin, SA Zotkin, C Bokel, M Botje, N Brümmer, J Engelen, E Koffeman, P Kooijman, A van Sighem, H Tiecke, N Tuning, JJ Velthuis, W Verkerke, J Vossebeld, L Wiggers, E de Wolf, D Acosta, B Bylsma, LS Durkin, J Gilmore, CM Ginsburg, CL Kim, TY Ling, P Nylander, HE Blaikley, S Boogert, RJ Cashmore, AM Cooper-Sarkar, RCE Devenish, JK Edmonds, J Grosse-Knetter, N Harnew, T Matsushita, VA Noyes, A Quadt, O Ruske, MR Sutton, R Walczak, DS Waters, A Bertolin, R Brugnera, R Carlin, F Dal Corso, S Dondana, U Dosselli, S Dusini, S Limentani, M Morandin, M Posocco, L Stanco, R Stroili, C Voci, L Iannotti, BY Oh, JR Okrasinski, WS Toothacker, JJ Whitmore, Y Iga, G D'Agostini, G Marini, A Nigro, M Raso, C Cormack, JC Hart, NA McCubbin, TP Shah, D Epperson, C Heusch, HFW Sadrozinski, A Seiden, R Wichmann, DC Williams, N Pavel, H Abramowicz, S Dagan, S Kananov, A Kreisel, A Levy, T Abe, T Fusayasu, M Inuzuka, K Nagano, K Umemori, T Yamashita, R Hamatsu, T Hirose, K Homma, S Kitamura, T Nishimura, M Arneodo, R Cirio, M Costa, MI Ferrero, S Maselli, V Monaco, C Peroni, MC Petrucci, M Ruspa, A Solano, A Staiano, M Dardo, DC Bailey, CP Fagerstroem, R Galea, T Koop, GM Levman, JF Martin, RS Orr, S Polenz, A Sabetfakhri, D Simmons, JM Butterworth, CD Catterall, ME Hayes, EA Heaphy, TW Jones, JB Lane, BJ West, J Ciborowski, R Ciesielski, G Grzelak, RJ Nowak, JM Pawlak, R Pawlak, B Smalska, T Tymieniecka, AK Wróblewski, JA Zakrzewski, AF Zarnecki, M Adamus, T Gadaj, O Deppe, Y Eisenberg, D Hochman, U Karshon, WF Badgett, D Chapin, R Cross, C Foudas, S Mattingly, DD Reeder, WH Smith, A Vaiciulis, T Wildschek, M Wodarczyk, A Deshpande, S Dhawan, VW Hughes, S Bhadra, WR Frisken, R Hall-Wilton, M Khakzad, S Menary, WB Schmidke

Angular and current-target correlations in deep inelastic scattering at HERA

EUROPEAN PHYSICAL JOURNAL C 12:1 (2000) 53-68

Authors:

J Breitweg, S Chekanov, M Derrick, D Krakauer, S Magill, B Musgrave, A Pellegrino, J Repond, R Stanek, R Yoshida, MCK Mattingly, G Abbiendi, F Anselmo, P Antonioli, G Bari, M Basile, L Bellagamba, D Boscherini, A Bruni, G Bruni, GC Romeo, G Castellini, L Cifarelli, F Cindolo, A Contin, N Coppola, M Corradi, S De Pasquale, P Giusti, G Iacobucci, G Laurenti, G Levi, A Margotti, T Massam, R Nania, F Palmonari, A Pesci, A Polini, G Sartorelli, YZ Garcia, A Zichichi, C Amelung, A Bornheim, I Brock, K Coböken, J Crittenden, R Deffner, M Eckert, H Hartmann, K Heinloth, L Heinz, E Hilger, HP Jakob, A Kappes, UF Katz, R Kerger, E Paul, M Pfeiffer, J Rautenberg, H Schnurbusch, A Stifutkin, J Tandler, A Weber, H Wieber, DS Bailey, O Barret, WN Cottingham, B Foster, GP Heath, HF Heath, JD McFall, D Piccioni, J Scott, RJ Tapper, M Capua, A Mastroberardino, M Schioppa, G Susinno, HY Jeoung, JY Kim, JH Lee, IT Lim, KJ Ma, MY Pac, A Caldwell, N Cartiglia, Z Jing, W Liu, B Mellado, JA Parsons, S Ritz, R Sacchi, S Sampson, F Sciulli, Q Zhu, P Borzemski, J Chwastowski, A Eskreys, J Figiel, K Klimek, K Olkiewicz, MB Przybycien, L Zawiejski, L Adamczyk, B Bednarek, K Jelen, D Kisielewska, AM Kowal, T Kowalski, M Przybycien, E Rulikowska-Zarebska, L Suszycki, J Zajac, Z Dulinski, A Kotanski, LAT Bauerdick, U Behrens, JK Bienlein, C Burgard, K Desler, G Drews, A Fox-Murphy, U Fricke, F Goebel, P Göttlicher, R Graciani, T Haas, W Hain, GF Hartner, D Hasell, K Hebbel, KF Johnson, M Kasemann, W Koch, U Kötz, H Kowalski, L Lindemann, B Löhr, M Martínez, J Milewski, M Milite, T Monteiro, M Moritz, D Notz, F Pelucchi, K Piotrzkoswski, M Rohde, PRB Saull, AA Savin, U Schneekloth, O Schwarzer, F Selonke, M Sievers, S Stonjek, E Tassi, G Wolf, U Wollmer, C Youngman, W Zeuner, BD Burow, C Coldewey, HJ Grabosch, ALD Viani, A Meyer, K Mönig, S Schlenstedt, PB Straub, G Barbagli, E Gallo, P Pelfer, G Maccarrone, L Votano, A Bamberger, S Eisenhardt, P Markun, H Raach, S Wölfle, NH Brook, PJ Bussey, AT Doyle, SW Lee, N Macdonald, GJ McCance, DH Saxon, LE Sinclair, IO Skillicorn, E Strickland, R Waugh, I Bohnet, N Gendner, U Holm, A Meyer-Larsen, H Salehi, K Wick, A Garfagnini, I Gialas, LK Gladilin, D Kçira, R Klanner, E Lohrmann, G Poelz, F Zetsche, TC Bacon, JE Cole, G Howell, L Lamberti, KR Long, DB Miller, A Prinias, JK Sedgbeer, D Sideris, AD Tapper, R Walker, U Mallik, SM Wang, P Cloth, D Filges, T Ishii, M Kuze, I Suzuki, K Tokushuku, S Yamada, K Yamauchi, Y Yamazaki, SH Ahn, SH An, SJ Hong, SB Lee, SW Nam, SK Park, H Lim, IH Park, D Son, F Barreiro, JP Fernández, G García, C Glasman, JM Hernández, L Labarga, J del Peso, J Puga, I Redondo, J Terrón, F Corriveau, DS Hanna, J Hartmann, WN Murray, A Ochs, S Padhi, M Riveline, DG Stairs, M St-Laurent, M Wing, T Tsurugai, V Bashkirov, BA Dolgoshein, GL Bashindzhagyan, PF Ermolov, YA Golubkov, LA Khein, NA Korotkova, IA Korzhavina, VA Kuzmin, OY Lukina, AS Proskuryakov, LM Shcheglova, AN Solomin, SA Zotkin, C Bokel, M Botje, N Brümmer, J Engelen, E Koffeman, P Kooijman, A van Sighem, W Tiecke, N Tuning, JJ Velthuis, W Verkerke, J Vossebeld, L Wiggers, E de Wolf, D Acosta, B Bylsma, LS Durkin, J Gilmore, CM Ginsburg, CL Kim, TY Ling, P Nylander, HE Blaikley, S Boogert, RJ Cashmore, AM Cooper-Sarkar, RCE Devenish, JK Edmonds, J Grosse-Knetter, N Harnew, T Matsushita, VA Noyes, A Quadt, O Ruske, MR Sutton, R Walczak, DS Waters, A Bertolin, R Brugnera, R Carlin, F Dal Corso, S Dondana, U Dosselli, S Dusini, S Limentani, M Morandin, M Posocco, L Stanco, R Stroili, C Voci, L Iannotti, BY Oh, JR Okrasinski, WS Toothacker, JJ Whitmore, Y Iga, G D'Agostini, G Marini, A Nigro, M Raso, C Cormack, JC Hart, NA McCubbin, TP Shah, D Epperson, C Heusch, HFW Sadrozinski, A Seiden, R Wichmann, DC Williams, N Pavel, H Abramowicz, S Dagan, S Kananov, A Kreisel, A Levy, A Schechter, T Abe, T Fusayasu, M Inuzuka, K Nagano, K Umemori, T Yamashita, R Hamatsu, T Hirose, K Homma, S Kitamura, T Nishimura, M Arneodo, R Cirio, M Costa, MI Ferrero, S Maselli, V Monaco, C Peroni, MC Petrucci, M Ruspa, A Solano, A Staiano, M Dardo, DC Bailey, CP Fagerstroem, R Galea, T Koop, GM Levman, JF Martin, RS Orr, S Polenz, A Sabetfakhri, D Simmons, JM Butterworth, CD Catterall, ME Hayes, EA Heapby, TW Jones, JB Lane, J Ciborowski, G Grzelak, RJ Nowak, JM Pawlak, R Pawlak, B Smalska, T Tymieniecka, AK Wróblewski, JA Zakrzewski, AF Zarnecki, M Adamus, T Gadaj, O Deppe, Y Eisenberg, D Hochman, U Karshon, WF Badgett, D Chapin, R Cross, C Foudas, S Mattingly, DD Reeder, WH Smith, A Vaiciulis, T Wildschek, M Wodarczyk, A Deshpande, S Dhawan, VW Hughes, S Bhadra, WR Frisken, R Hall-Wilton, M Khakzad, S Menary, WB Schmidke