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Search for contact interactions, large extra dimensions and finite quark radius in ep collisions at HERA

Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 591:1-2 (2004) 23-41

Authors:

S Chekanov, M Derrick, D Krakauer, JH Loizides, S Magill, S Miglioranzi, B Musgrave, J Repond, R Yoshida, MCK Mattingly, P Antonioli, G Bari, M Basile, L Bellagamba, D Boscherini, A Bruni, G Bruni, G Cara Romeo, L Cifarelli, F Cindolo, A Contin, M Corradi, S de Pasquale, P Giusti, G Iacobucci, A Margotti, A Montanari, R Nania, F Palmonari, A Pesci, G Sartorelli, A Zichichi, G Aghuzumtsyan, D Bartsch, I Brock, S Goers, H Hartmann, E Hilger, P Irrgang, HP Jakob, O Kind, U Meyer, E Paul, J Rautenberg, R Renner, A Stifutkin, J Tandler, KC Voss, M Wang, A Weber, DS Bailey, NH Brook, JE Cole, GP Heath, T Namsoo, S Robins, M Wing, M Capua, A Mastroberardino, M Schioppa, G Susinno, JY Kim, YK Kim, JH Lee, IT Lim, MY Pac, A Caldwell, M Helbich, X Liu, B Mellado, Y Ning, S Paganis, Z Ren, WB Schmidke, F Sciulli, J Chwastowski, A Eskreys, J Figiel, A Galas, K Olkiewicz, P Stopa, L Zawiejski, L Adamczyk, T Bold, I Grabowska-Bold, D Kisielewska, AM Kowal, M Kowal, T Kowalski, M Przybycien, L Suszycki, D Szuba, J Szuba, A Kotański, W Slomiński, V Adler, U Behrens, I Bloch, K Borras, V Chiochia

Abstract:

A search for physics beyond the Standard Model has been performed with high-Q2 neutral current deep inelastic scattering events recorded with the ZEUS detector at HERA. Two data sets, e+p→e +X and e-p→e-X, with respective integrated luminosities of 112 pb-1 and 16 pb-1, were analyzed. The data reach Q2 values as high as 40000 GeV2. No significant deviations from Standard Model predictions were observed. Limits were derived on the effective mass scale in eeqq contact interactions, the ratio of leptoquark mass to the Yukawa coupling for heavy leptoquark models and the mass scale parameter in models with large extra dimensions. The limit on the quark charge radius, in the classical form factor approximation, is 0.85×10 -16 cm. © 2004 Published by Elsevier B.V.
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First Measurements of Inclusive W and Z Cross Sections from Run II of the Tevatron Collider

ArXiv hep-ex/0406078 (2004)
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Search for Doubly-Charged Higgs Bosons Decaying to Dileptons in ppbar Collisions at sqrt(s)=1.96 TeV

ArXiv hep-ex/0406073 (2004)

Authors:

CDF Collaboration, D Acosta
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Photoproduction of D*± mesons associated with a leading neutron

Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 590:3-4 (2004) 143-160

Authors:

S Chekanov, M Derrick, D Krakauer, JH Loizides, S Magill, S Miglioranzi, B Musgrave, J Repond, R Yoshida, MCK Mattingly, P Antonioli, G Bari, M Basile, L Bellagamba, D Boscherini, A Bruni, G Bruni, G Cara Romeo, L Cifarelli, F Cindolo, A Contin, M Corradi, S de Pasquale, P Giusti, G Iacobucci, A Margotti, A Montanari, R Nania, F Palmonari, A Pesci, G Sartorelli, A Zichichi, G Aghuzumtsyan, D Bartsch, I Brock, S Goers, H Hartmann, E Hilger, P Irrgang, HP Jakob, O Kind, U Meyer, E Paul, J Rautenberg, R Renner, A Stifutkin, J Tandler, KC Voss, M Wang, A Weber, DS Bailey, NH Brook, JE Cole, GP Heath, T Namsoo, S Robins, M Wing, M Capua, A Mastroberardino, M Schioppa, G Susinno, JY Kim, YK Kim, JH Lee, IT Lim, MY Pac, A Caldwell, M Helbich, X Liu, B Mellado, Y Ning, S Paganis, Z Ren, WB Schmidke, F Sciulli, J Chwastowski, A Eskreys, J Figiel, A Galas, K Olkiewicz, P Stopa, L Zawiejski, L Adamczyk, T Bold, I Grabowska-Bold, D Kisielewska, AM Kowal, M Kowal, T Kowalski, M Przybycień, L Suszycki, D Szuba, J Szuba, A Kotański, W Slomiński, V Adler, U Behrens, I Bloch, K Borras, V Chiochia

Abstract:

The photoproduction of D*±(2010) mesons associated with a leading neutron has been observed with the ZEUS detector in ep collisions at HERA using an integrated luminosity of 80 pb-1. The neutron carries a large fraction, xL>0.2, of the incoming proton beam energy and is detected at very small production angles, θn< 0.8 mrad, an indication of peripheral scattering. The D* meson is centrally produced with pseudorapidity η<1.5, and has a transverse momentum pT>1.9 GeV, which is large compared to the average transverse momentum of the neutron of 0.22 GeV. The ratio of neutron-tagged to inclusive D* production is 8.85±0.93(stat.) +0.48-0.61(syst.)% in the photon-proton center-of-mass energy range 130
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CDF Run IIb Silicon Detector: Electrical Performance and Deadtime-Less Operation

IEEE Transactions on Nuclear Science Institute of Electrical and Electronics Engineers (IEEE) 51:3 (2004) 987-993

Authors:

T Akimoto, M Aoki, P Azzi, N Bacchetta, S Behari, D Benjamin, D Bisello, G Bolla, D Bortoletto, G Busetto, S Cabrera, A Canepa, G Cardoso, M Chertok, CI Ciobanu, G Derylo, I Fang, EJ Feng, JP Fernandez, B Flaugher, J Freeman, L Galtieri, J Galyardt, M Garcia-Sciveres, G Giurgiu, C Haber, D Hale, K Hara, R Harr, C Hill, J Hoff, B Holbrook, SC Hong, M Hrycyk, TH Hsiung, J Incandela, EJ Jeon, KK Joo, T Junk, H Kahkola, S Karjalainen, S Kim, K Kobayashi, DJ Kong, B Krieger, M Kruse, N Kuznetsova, S Kyre, R Lander, T Landry, R Lauhakangas, J Lee, R-S Lu, P Lujan, P Lukens, E Mandelli, C Manea, P Maksimovic, P Merkel, SN Min, S Moccia, I Nakano, T Nelson, B Nord, J Novak, T Okusawa, R Orava, Y Orlov, K Osterberg, D Pantano, V Pavlicek, D Pellett, J Pursley, P Riipinen, B Schuyler, A Shenai, A Soha, D Stuart, R Tanaka, M Tavi, H Von der Lippe, J-P Walder, Z Wang, Marc Weber, W Wester, K Yamamoto, YC Yang, W Yao, W Yao, R Yarema, JC Yun, F Zetti, T Zimmerman, S Zimmermann, S Zucchelli
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