Accelerator Neutrinos

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The trigger for K0 → π0π0 decays of the NA48 experiment at CERN

Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 485:3 (2002) 676-697

Authors:

G Barr, D Cundy, F Formenti, B Gorini, B Hallgren, W Iwanski, P Kapusta, G Laverrière, M Lenti, I Mikulec, M Velasco, O Vossnack, H Wahl, M Ziolkowski, M Porcu, F Rossi, C Avanzini, P Calafiura, M Cirilli, F Costantini, F Laico, G Magazzù, F Morsani, GM Pierazzini, D Rizzi, M Sozzi, R Tripiccione, H Dibon, G Fischer, M Jeitler, M Markytan, G Neuhofer, M Pernicka, A Taurok, L Widhalm

Abstract:

The trigger used for the collection of the samples of K0 → π0π0decays in the NA48 experiment at CERN uses a novel pipeline design in order to satisfy the demanding specifications of a high rate kaon beam. The trigger algorithms, architecture and performance are described. © 2002 Elsevier Science B.V. All rights reserved.
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Precise measurement of the decay KL → π0γγ

Physics Letters Section B Nuclear Elementary Particle and High Energy Physics 536:3-4 (2002) 229-240

Authors:

A Lai, D Marras, A Bevan, RS Dosanjh, TJ Gershon, B Hay, GE Kalmus, C Lazzeroni, DJ Munday, MD Needham, 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, M Lenti, S Luitz, I Mikulec, A Norton, S Palestini, B Panzer-Steindel, G Tatishvili, H Taureg, M Velasco, H Wahl, C Cheshkov, P Hristov, V Kekelidze, D Madigojine, N Molokanova, Y Potrebenikov, A Zinchenko, I Knowles, V Martin, R Sacco, A Walker, M Contalbrigo, P Dalpiaz, J Duclos, PL Frabetti, A Gianoli, M Martini

Abstract:

The decay rate of KL → π0 γγ has been measured with the NA48 detector at the CERN SPS. A total of 2558 KL π0γγ candidates have been observed with a residual background of 3.2%. The branching ratio is determined to be (1.36 ± 0.03(stat) ± 0.03(syst) ± 0.03(norm)) × 10-6 and the vector coupling constant av = -0.46 ± 0.03(stat) ± 0.04(syst). This result suggests that the CP-violation effects are dominating in the KL → π0e+e- decay. An upper limit for the KL → π0γγ decay rate in the two photon mass region mγγ < mπ0 is also given. © 2002 Published by Elsevier Science B.V.
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The MINOS Scintillator Calorimeter System

IEEE Transactions on Nuclear Science Institute of Electrical and Electronics Engineers (IEEE) 49:3 (2002) 861

Authors:

P Adamson, KV Alexandrov, G Alexeev, T Alexopoulos, WWM Allison, GJ Alner, B Anderson, DF Anderson, K Anderson, C Andreopoulos, C Arroyo, D Attree, F Avignone, DS Ayres, B Baller, B Barsh, M Barker, PD Barnes, WL Barrett, RH Bernstien, S Bilenky, GJ Bock, DJ Boehnlein, D Bogert, PM Border, C Bower, E Buckley-Geer, A Byon-Wagner, TR Chase, S Chernichenko, S Childress, BC Choudhary, JH Cobb, A Cohee, JD Cossairt, H Courant, JW Dawson, D DeMuth, PJ Dervan, A DeSanto, N Diaczenko, MV Diwan, G Drake, M Drew, R Ducar, T Durkin, R Edgecock, S Eichblatt, A Erwin, E Falk Harris, GJ Feldman, N Felt, TH Fields, HR Gallagher, M Gebhard, Yu Gilitsky, N Giokaris, MC Goodman, Yu Gornushkin, N Grossman, JJ Grudzinski, VJ Guarino, V Gudkov, J Guo, Yu Gutnikov, R Halsall, J Hanson, D Harris, PG Harris, E Hartouni, R Hatcher, S Hayden, R Heinz, K Heller, N Hill, QH Hu, T Hu, J Hylen, M Ignatenko, G Irwin, C James, T Joffe-Minor, T Kafka, SMS Kasahara, E Katsavounidis, J Kilmer, HY Kim, V Kochetkov, G Koizumi, S Kopp, M Kordosky, D Krakauer, Z Krumstein, A Kulik, YF Lai, K Lang, C Laughton, R LeBeau, A Lebedev, R Lee, PJ Litchfield, J Liu, NP Longley, P Lucas, S Madani, V Makeev, WA Mann, A Marchionni, ML Marshak, J McDonald, JR Meier, E Melnikov, GI Merzon, MD Messier, DG Michael, RH Milburn, L Miller, WH Miller, SR Mishra, PS Miyagawa, J Mofin, R Morse, L Mualem, S Mufson, M Murtagh, J Musser, A Napier, D Naples, C Nelson, JK Nelson, H Newman, TC Nicholls, A Nozdrin, J Oliver, W Oliver, A Olshevski, V Onuchin, V Paolone, A Para, T Patzak, GF Pearce, N Pearson, CW Peck, C Perry, EA Peterson, DA Petyt, A Pla-Dalmau, RK Plunkett, LE Price, DR Pushka, RA Rameika, AL Read, B Rebel, C Rosenfeld, K Ruddick, VA Ryabov, R Saakyan, A Sadovski, M Sanchez, N Saoulidou, J Schneps, PV Schoessow, V Semenov, I Shein, BW Sheng, A Sisakian, W Smart, V Smirnitsky, C Smith, PN Smith, V Smotriaev, A Soldatov, N Solomey, R Soltz, NI Starkov, P Sullivan, EC Swallow, M Szigety, R Talaga, J Thomas, JL Thron, V Tokmenin, DN Tovee, R Trendler, J Trevor, I Trostin, VA Tsarev, G Tzanakos, G Unel, J Urheim, A Usachev, T Vahle, MM Velasco, L Wai, D Wark, A Weber, RC Webb, A Wehmann, N West, RF White, R Wildberger, R Winston, SG Wojcicki, D Wright, XM Xia, WG Yan, JC Yun, ZA Zhu
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Measurement of Day and Night Neutrino Energy Spectra at SNO and Constraints on Neutrino Mixing Parameters

Physical Review Letters 89 (2002) 011302 5pp

Authors:

SD Biller, Q.R. Ahmad, R.C. Allen, T.C. Anderson
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Search for leptoquark pairs decaying into vv + jets in pp̄ collisions at √s = 1.8 Tev

Physical Review Letters 88:19 (2002) 1918011-1918017

Authors:

VM Abazov, B Abbott, A Abdesselam, M Abolins, V Abramov, BS Acharya, DL Adams, M Adams, SN Ahmed, GD Alexeev, A Alton, GA Alves, N Amos, EW Anderson, Y Arnoud, C Avila, MM Baarmand, VV Babintsev, L Babukhadia, TC Bacon, A Baden, 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, M Bhattacharjee, G Blazey, F Blekman, S Blessing, A Boehnlein, NI Bojko, F Borcherding, K Bos, T Bose, A Brandt, R Breedon, G Briskin, R Brock, G Brooijmans, A Bross, D Buchholz, M Buehler, V Buescher, VS Burtovoi, JM Butler, F Canelli, W Carvalho, D Casey, Z Casilum, H Castilla-Valdez, D Chakraborty, KM Chan, SV Chekulaev, DK Cho, S Choi, S Chopra, JH Christenson, M Chung, D Claes, AR Clark, L Coney, B Connolly, WE Cooper, D Coppage, S Crépé-Renaudin, MAC Cummings, D Cutts, GA Davis, K Davis, K De, SJ de Jong, K Del Signore, M Demarteau, R Demina, P Demine, D Denisov, SP Denisov, S Desai, HT Diehl, M Diesburg, S Doulas, Y Ducros, LV Dudko

Abstract:

The results of a search for leptoquark (LQ) pairs in (85.2 ±3.7) pb-1 of pp̄ collider data collected by the DO experiments were presented. Scalar leptoquarks for the masses less than 98 GeV/c2, vector leptoquarks for masses less than 200 GeV/c2 and coupling which produced the minimum cross-section were excluded. Results showed absence of an evidence for leptoquark production and a limit was set on νν + jets as a function of the mass of leptoquark.