共查询到20条相似文献,搜索用时 15 毫秒
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Harris DA Briere RA Cheu E Makoff G McFarland KS Roodman A Schwingenheuer B Somalwar SV Wah YW Winstein B Winston R Arisaka K Roberts D Slater W Weaver M Barker AR Swallow EC Bock GJ Coleman R Crisler M Enagonio J Ford R Hsiung YB Jensen DA Ramberg E Tschirhart R Collins EM Gollin GD Nakaya T Yamanaka T Gu P Haas P Hogan WP Kim SK Matthews JN Myung SS Schnetzer S Thomson GB Zou Y 《Physical review letters》1993,71(24):3918-3921
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Nakaya T Yamanaka T Arisaka K Roberts D Slater W Weaver M Briere RA Cheu E Harris DA McFarland KS Roodman A Schwingenheuer B Somalwar SV Wah YW Winstein B Winston R Barker AR Swallow EC Bock GJ Coleman R Crisler M Enagonio J Ford R Hsiung YB Jensen DA Ramberg E Tschirhart R Collins EM Gollin GD Gu P Haas P Hogan WP Kim SK Matthews JN Myung SS Schnetzer S Thomson GB Zou Y 《Physical review letters》1994,73(16):2169-2172
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Barker A Briere RA Gibbons LK Makoff G Papadimitriou V Patterson JR Somalwar S Wah YW Winstein B Winston R Woods M Yamamoto H Swallow EC Bock GJ Coleman R Enagonio J Hsiung YB Tschirhart R Stanfield K Stefanski R Yamanaka T Gollin GD Karlsson M Okamitsu JK Debu P Peyaud B Turlay R Vallage B 《Physical review D: Particles and fields》1990,41(11):3546-3547
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Pocanić D Frlez E Baranov VA Bertl W Brönnimann Ch Bychkov M Crawford JF Daum M Khomutov NV Korenchenko AS Korenchenko SM Kozlowski T Kravchuk NP Kuchinsky NA Li W Minehart RC Mzhavia D Ritchie BG Ritt S Rozhdestvensky AM Sidorkin VV Smith LC Supek I Tsamalaidze Z VanDevender BA Wang Y Wirtz HP Ziock KO 《Physical review letters》2004,93(18):181803
Using a large acceptance calorimeter and a stopped pion beam we have made a precise measurement of the rare pi(+)-->pi(0)e(+)nu (pi(beta)) decay branching ratio. We have evaluated the branching ratio by normalizing the number of observed pi(beta) decays to the number of observed pi(+)-->e(+)nu (pi(e2)) decays. We find the value of Gamma(pi(+)-->pi(0)e(+)nu)/Gamma(total)=[1.036+/-0.004(stat)+/-0.004(syst)+/-0.003(pi(e2))]x10(-8), where the first uncertainty is statistical, the second systematic, and the third is the pi(e2) branching ratio uncertainty. Our result agrees well with the standard model prediction. 相似文献
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Alavi-Harati A Alexopoulos T Arenton M Arisaka K Averitte S Barbosa RF Barker AR Barrio M Bellantoni L Bellavance A Belz J Bergman DR Blucher E Bock GJ Bown C Bright S Cheu E Childress S Coleman R Corcoran MD Corti G Cox B Erwin AR Ford R Glazov A Golossanov A Graham G Graham J Halkiadakis E Hamm J Hanagaki K Hidaka S Hsiung YB Jejer V Jensen DA Kessler R Kobrak HG LaDue J Lath A Ledovskoy A McBride PL Mikelsons P Monnier E Nakaya T Nelson KS Nguyen H O'Dell V Pordes R Prasad V Qi XR Quinn B 《Physical review letters》2002,89(21):211801
The recent discovery of a large CP violating asymmetry in KL-->pi+pi-e+e- mode has prompted us to seach for the associated KL-->pi 0 pi 0 e+e- decay mode in the KTeV-E799 experiment at Fermilab. In 2.7 x 10(11) K(L) decays, one candidate event has been observed with an expected background of 0.3 event, resulting in an upper limit for the KL-->pi 0 pi 0 e+e- branching ratio of 6.6 x 10(-9) at the 90% C.L. 相似文献
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Anjos JC Appel JA Bean A Bracker SB Browder TE Cremaldi LM Duboscq JE Elliott JR Escobar CO Gibney MC Hartner GF Karchin PE Kumar BR Losty MJ Luste GJ Mantsch PM Martin JF McHugh S Menary SR Morrison RJ Nash T Pinfold J Punkar G Purohit MV Ross WR Santoro AF Schmidt DM Shoup AL Sliwa K Sokoloff MD Souza MH Spalding WJ Streetman ME Stundia AB Witherell MS 《Physical review D: Particles and fields》1991,44(11):R3371-R3374
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Harris DA Briere RA Cheu E Makoff G McFarland KS Roodman A Schwingenheuer B Somalwar SV Wah YW Winstein B Winston R Arisaka K Roberts D Slater W Weaver M Barker AR Swallow EC Bock GJ Coleman R Crisler M Enagonio J Ford R Hsiung YB Jensen DA Ramberg E Tschirhart R Collins EM Gollin GD Nakaya T Yamanaka T Gu P Haas P Hogan WP Kim SK Matthews JN Myung SS Schnetzer S Thomson GB Zou Y 《Physical review letters》1993,71(24):3914-3917