Accelerator Neutrinos

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New measurements of the η and K0 masses

Physics Letters Section B Nuclear Elementary Particle and High Energy Physics 533:3-4 (2002) 196-206

Authors:

A Lai, D Marras, JR Batley, AJ Bevan, RS Dosanjh, TJ Gershon, 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, W Funk, L Gatignon, A Gonidec, B Gorini, G Govi, P Grafström, W Kubischta, A Lacourt, M Lenti, I Mikulec, A Norton, S Palestini, B Panzer-Steindel, D Schinzel, G Tatishvili, H Taureg, M Velasco, H Wahl, C Cheskov, P Hristov, V Kekelidze, D Madigojine, N Molokanova, Y Potrebenikov, A Zinchenko, VJ Martin, P Rubin, R Sacco, A Walker, D Bettoni, R Calabrese, M Contalbrigo, P Dalpiaz, J Duclos, PL Frabetti, A Gianoli, E Luppi, M Martini, L Masetti, F Petrucci, M Savrié, M Scarpa, A Bizzeti, M Calvetti, G Collazuol, G Graziani, E Iacopini, F Martelli, M Veltri, HG Becker, M Eppard, H Fox, A Hirstius, K Holtz, A Kalter, K Kleinknecht, U Koch, L Köpke, P Lopes da Silva, P Marouelli, I Mestvirishvili, I Pellmann, A Peters, 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

Abstract:

New measurements of the η and K0 masses have been performed using decays to 3π0 with the NA48 detector at the CERN SPS. Using symmetric decays to reduce systematic effects, the results M(η) = 547.843 ± 0.051 MeV/c2 and M(K0) = 497.625 ± 0.031 MeV/c2 were obtained. © 2002 Elsevier Science B.V. All rights reserved.
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Measurement of B-meson lifetimes using fully reconstructed B decays produced in pp̄ collisions at √s = 1.8 TeV

Physical Review D Particles Fields Gravitation and Cosmology 65:9 A (2002) 920091-920097

Authors:

D Acosta, T Affolder, H Akimoto, MG Albrow, D Ambrose, D Amidei, K Anikeev, J Antos, G Apollinari, T Arisawa, A Artikov, T Asakawa, W Ashmanskas, F Azfar, P Azzi-Bacchetta, N Bacchetta, H Bachacou, W Badgett, S Bailey, P de Barbaro, A Barbaro-Galtieri, VE Barnes, BA Barnett, S Baroiant, M Barone, G Bauer, F Bedeschi, S Belforte, WH Bell, G Bellettini, J Bellinger, D Benjamin, J Bensinger, A Beretvas, JP Berge, J Berryhill, A Bhatti, M Binkley, D Bisello, M Bishai, RE Blair, C Blocker, K Bloom, B Blumenfeld, SR Blusk, A Bocci, A Bodek, G Bolla, Y Bonushkin, D Bortoletto, J Boudreau, A Brandl, S van den Brink, C Bromberg, M Brozovic, E Brubaker, N Bruner, J Budagov, HS Budd, K Burkett, G Busetto, A Byon-Wagner, KL Byrum, S Cabrera, P Calafiura, M Campbell, W Carithers, J Carlson, D Carlsmith, W Caskey, 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, JY Chung, WH Chung, YS Chung, CI Ciobanu, AG Clark, M Coca, AP Colijn, A Connolly, M Convery, J Conway, M Cordelli, J Cranshaw, R Culbertson

Abstract:

We present an improved measurement of b-meson lifetimes using fully reconstructed B-decays produced in pp̄ collisions at √s = 1.8 TeV, using 114 pb-1 of data collected at the Collider Detector at Fermilab. We obtain τ(B+) = 1.636±0.058(stat)±0.025(syst) ps, τ(B0) = 1.497±0.073(stat)±0.032(syst) ps and for the lifetime ratio τ(B+)/τ(B0) = 1.093±0.066(stat)±0.028(syst).
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Search for single-top-quark production in pp̄ collisions at √s=1.8 TeV

Physical Review D Particles Fields Gravitation and Cosmology 65:9 A (2002) 911021-911026

Authors:

D Acosta, T Affolder, H Akimoto, MG Albrow, P Amaral, D Ambrose, D Amidei, K Anikeev, J Antos, G Apollinari, T Arisawa, A Artikov, T Asakawa, W Ashmanskas, F Azfar, P Azzi-Bacchetta, N Bacchetta, H Bachacou, S Bailey, P de Barbaro, A Barbaro-Galtieri, VE Barnes, BA Barnett, S Baroiant, M Barone, G Bauer, F Bedeschi, S Belforte, WH Bell, G Bellettini, J Bellinger, D Benjamin, J Bensinger, A Beretvas, JP Berge, J Berryhill, A Bhatti, M Binkley, D Bisello, M Bishai, RE Blair, C Blocker, K Bloom, B Blumenfeld, SR Blusk, A Bocci, A Bodek, G Bolla, Y Bonushkin, D Bortoletto, J Boudreau, A Brandl, S van den Brink, C Bromberg, M Brozovic, E Brubaker, N Bruner, E Buckley-Geer, J Budagov, HS Budd, K Burkett, G Busetto, A Byon-Wagner, KL Byrum, S Cabrera, P Calafiura, M Campbell, W Carithers, J Carlson, D Carlsmith, W Caskey, 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, JY Chung, YS Chung, CI Ciobanu, AG Clark, AP Colijn, A Connolly, M Convery, J Conway, M Cordelli, J Cranshaw, R Culbertson, D Dagenhart

Abstract:

We search for standard model single-top-quark production in the W-gluon fusion and W* channels using 106 pb-1 of data from pp̄ collisions at √s=1.8 TeV collected with the Collider Detector at Fermilab. We set an upper limit at 95% confidence level (C.L.) on the combined W-gluon fusion and W* single-top cross section of 14 pb, roughly six times larger than the standard model prediction. Separate 95% C.L. upper limits in the W-gluon fusion and W* channels are also determined and are found to be 13 and 18 pb, respectively.
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Precise measurement of the decay KL to pi0 gamma gamma

Physics Letters B 536 (2002) 229-240

Authors:

GD Barr, D. Schinzel, K. Kleinknecht, U. Koch
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Search for Leptoquark Pairs Decaying into nu nu + jets in ppbar Collisions at sqrt(s) = 1.8 TeV

Physical Review Letters 88 (2002) 191801 7pp

Authors:

C Hays, P. M. Tuts, G. Landsberg, H. B. Prosper
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