Accelerator Neutrinos

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Search for anomalous production of diphoton events with missing transverse energy at CDF and limits on gauge-mediated supersymmetry-breaking models

Physical Review D - Particles, Fields, Gravitation and Cosmology 71:3 (2005)

Authors:

D Acosta, J Adelman, T Affolder, T Akimoto, MG Albrow, D Ambrose, S Amerio, D Amidei, A Anastassov, K Anikeev, A Annovi, J Antos, M Aoki, G Apollinari, T Arisawa, JF Arguin, A Artikov, W Ashmanskas, A Attal, F Azfar, P Azzi-Bacchetta, N Bacchetta, H Bachacou, W Badgett, A Barbaro-Galtieri, GJ Barker, VE Barnes, BA Barnett, S Baroiant, M Barone, G Bauer, F Bedeschi, S Behari, S Belforte, G Bellettini, J Bellinger, E Ben-Haim, D Benjamin, A Beretvas, A Bhatti, M Binkley, D Bisello, M Bishai, RE Blair, C Blocker, K Bloom, B Blumenfeld, A Bocci, A Bodek, G Bolla, A Bolshov, PSL Booth, D Bortoletto, J Boudreau, S Bourov, C Bromberg, E Brubaker, J Budagov, HS Budd, K Burkett, G Busetto, P Bussey, KL Byrum, S Cabrera, M Campanelli, M Campbell, A Canepa, M Casarsa, D Carlsmith, S Carron, R Carosi, M Cavalli-Sforza, A Castro, P Catastini, D Cauz, A Cerri, L Cerrito, J Chapman, C Chen, YC Chen, M Chertok, G Chiarelli, G Chlachidze, F Chlebana, I Cho, K Cho, D Chokheli, JP Chou, ML Chu, S Chuang, JY Chung, WH Chung, YS Chung, CI Ciobanu, MA Ciocci, AG Clark, D Clark, M Coca, A Connolly, M Convery

Abstract:

We present the results of a search for anomalous production of diphoton events with large missing transverse energy using the Collider Detector at Fermilab. In 202 pb -1 of pp̄ collisions at √s = 1.96 TeV we observe no candidate events, with an expected standard model background of 0.27 ± 0.07(stat) ± 0.10(syst) events. The results exclude a lightest chargino of mass less than 167 GeV/c 2, and lightest neutralino of mass less than 93 GeV/c 2 at 95% C.L. in a gauge-mediated supersymmetry-breaking model with a light gravitino. © 2005 The American Physical Society.
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The FINeSSE Detector

Nuclear and Particle Physics Proceedings Elsevier 139 (2005) 317-322

Authors:

S Brice, L Bugel, JM Conrad, J Doskow, C Dukes, D Finley, BT Fleming, GT Garvey, C Green, C Horowitz, T Katori, JM Link, WC Louis, L Lu, G McGregor, W Metcalf, HO Meyer, K Nelson, A Norman, P Ockerse, V Papavassiliou, SF Pate, JC Peng, H Ray, M Shaevitz, R Stefanski, M Sung, R Tayloe, R Van de Water, G Visser, L Wang, MO Wascko, GP Zeller
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Measurement of the top quark mass in all-jet events

Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 606:1-2 (2005) 25-33

Authors:

VM Abazov, B Abbott, A Abdesselam, M Abolins, V Abramov, BS Acharya, DL Adams, M Adams, GD Alexeev, A Alton, GA Alves, Y Arnoud, C Avila, L Babukhadia, TC Bacon, A Baden, S Baffioni, B Baldin, PW Balm, S Banerjee, E Barberis, P Baringer, J Barreto, JF Bartlett, U Bassler, D Bauer, A Bean, F Beaudette, M Begel, A Belyaev, SB Beri, G Bernardi, I Bertram, A Besson, R Beuselinck, VA Bezzubov, PC Bhat, V Bhatnagar, G Blazey, F Blekman, S Blessing, A Boehnlein, TA Bolton, F Borcherding, K Bos, T Bose, A Brandt, G Briskin, R Brock, G Brooijmans, A Bross, D Buchholz, M Buehler, V Buescher, JM Butler, F Canelli, W Carvalho, H Castilla-Valdez, D Chakraborty, KM Chan, DK Cho, S Choi, D Claes, AR Clark, B Connolly, WE Cooper, D Coppage, S Crépé-Renaudin, MAC Cummings, D Cutts, H Da Motta, GA Davis, K De, SJ De Jong, M Demarteau, R Demina, P Demine, D Denisov, SP Denisov, S Desai, HT Diehl, M Diesburg, S Doulas, LV Dudko, L Duflot, SR Dugad, A Duperrin, A Dyshkant, D Edmunds, J Ellison, JT Eltzroth, VD Elvira, R Engelmann, S Eno, P Ermolov, OV Eroshin, J Estrada, H Evans, VN Evdokimov, T Ferbel

Abstract:

We describe a measurement of the mass of the top quark from the purely hadronic decay modes of tt̄ pairs using all-jet data produced in pp̄ collisions at s=1.8 TeV at the Fermilab Tevatron Collider. The data, which correspond to an integrated luminosity of 110.2±5.8 pb-1, were collected with the DØ detector from 1992 to 1996. We find a top quark mass of 178.5±13.7(stat)±7.7(syst) GeV/c2. © 2004 Elsevier B.V. All rights reserved.
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Measurement of the radiative Ke3 branching ratio

Physics Letters Section B Nuclear Elementary Particle and High Energy Physics 605:3-4 (2005) 247-255

Authors:

A Lai, D Marras, A Bevan, RS Dosanjh, TJ Gershon, B Hay, GE Kalmus, C Lazzeroni, DJ Munday, E Olaiya, MA Parker, TO White, SA Wotton, G Barr, G Bocquet, A Ceccucci, T Cuhadar-Dönszelmann, D Cundy, G D'Agostini, N Doble, V Falaleev, L Gatignon, A Gonidec, B Gorini, G Govi, P Grafström, W Kubischta, A Lacourt, A Norton, S Palestini, B Panzer-Steindel, H Taureg, M Velasco, H Wahl, C Cheshkov, P Hristov, V Kekelidze, L Litov, D Madigojine, N Molokanova, Y Potrebenikov, S Stoynev, A Zinchenko, I Knowles, V Martin, R Sacco, A Walker, M Contalbrigo, P Dalpiaz, J Duclos, PL Frabetti, A Gianoli, M Martini, F Petrucci, M Savrié, A Bizzeti, M Calvetti, G Collazuol, G Graziani, E Iacopini, M Lenti, F Martelli, M Veltri, HG Becker, K Eppard, M Eppard, H Fox, A Kalter, K Kleinknecht, U Koch, L Köpke, P Lopes Da Silva, P Marouelli, I Pellmann, A Peters, B Renk, SA Schmidt, V Schönharting, Y Schué, R Wanke, A Winhart, M Wittgen, JC Chollet, L Fayard, L Iconomidou-Fayard, J Ocariz, G Unal, I Wingerter-Seez, G Anzivino, P Cenci, E Imbergamo, P Lubrano, A Mestvirishvili, A Nappi, M Pepe, M Piccini, L Bertanza, R Carosi, R Casali, C Cerri

Abstract:

We present a measurement of the relative branching ratio of the decay K0 → π±e±νγ (Ke3γ) with respect to K0 → π±e±ν (Ke3 + K e3γ) decay. The result is based on observation of 19 000 K e3γ and 5.6 × 106 Ke3 decays. The value of the branching ratio is Br(Ke3γ0, E γ* > 30 MeV, θeγ* > 20°)/Br(Ke30) = (0.964±0.008 -0.009+0.011)%. This result agrees with theoretical predictions but is at variance with a recently published result. © 2004 Elsevier B.V. All rights reserved.
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Another route to cp violation beyond the SM – The neutron EDM

Proceedings of Science 21 (2005)

Authors:

M Van Der Grinten, CA Baker, K Green, PS Iaydjiev, SN Ivanov, DL Wark, DD Doyle, PG Harris, DJR May, JM Pendlebury, DJ Richardson, DB Shiers, KF Smith, P Geltenbort

Abstract:

The neutron electric dipole moment (EDM) experiment at the Institut Laue-Langevin (ILL) has completed data taking and subsequently the systematic errors have been evaluated. In this paper the experimental technique is discussed and results of the experiment are given. The experiment is based on a precision measurement of the Larmor precession frequency of neutrons in a magnetic field and employs a cohabiting mercury magnetometer. We have reached a final statistical precision of 1.5 × 10-26 e cm, the systematic potential for error, dominated by geometric phase shifts due to magnetic field inhomogeneities in the experiment, is found to be of the same order as the statistical precision obtained.