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Improved search for B-S(0)-(B)over-bar(S)(0) oscillations

文献类型：期刊论文

;
作者ALEPH Collaboration
刊名EUROPEAN PHYSICAL JOURNAL C ; EUROPEAN PHYSICAL JOURNAL C
出版日期2003 ; 2003
卷号29期号:2页码:143-170
关键词B-S(0) OSCILLATIONS DECAYS ALEPH LEP FRAGMENTATION LIFETIMES DETECTOR PHYSICS MESONS B-S(0) OSCILLATIONS DECAYS ALEPH LEP FRAGMENTATION LIFETIMES DETECTOR PHYSICS MESONS
DOI10.1140/epjc/s2003-01230-5
通讯作者Heister, A (reprint author), Rhein Westfal TH Aachen, Inst Phys, D-52056 Aachen, Germany. ; Heister, A (reprint author), Rhein Westfal TH Aachen, Inst Phys, D-52056 Aachen, Germany.
英文摘要An improved search for B-s(0) oscillations is performed in the ALEPH data sample collected during the first phase of LEP, and reprocessed in 1998. Three analyses based on complementary event selections are presented. First, decays of B-s(0) mesons into hadronic flavour eigenstates are fully reconstructed. This selection yields a small sample of candidates with excellent decay length and momentum resolution and high average B-s(0) purity. Semileptonic decays with a reconstructed D-s(-) meson provide a second sample with larger statistics, high average B-s(0) purity, but a poorer momentum and decay length resolution due to the partial decay reconstruction. Finally, semileptonic b-hadron decays are inclusively selected and yield the data sample with the highest sensitivity to B-s(0) oscillations, as the much higher statistics compensate for the low average B-s(0) purity and poorer time resolution. A lower limit is set at Deltam(s) > 10.9 ps(-1) at 95%C.L., significantly lower than the expected limit of 15.2 ps(-1).; An improved search for B-s(0) oscillations is performed in the ALEPH data sample collected during the first phase of LEP, and reprocessed in 1998. Three analyses based on complementary event selections are presented. First, decays of B-s(0) mesons into hadronic flavour eigenstates are fully reconstructed. This selection yields a small sample of candidates with excellent decay length and momentum resolution and high average B-s(0) purity. Semileptonic decays with a reconstructed D-s(-) meson provide a second sample with larger statistics, high average B-s(0) purity, but a poorer momentum and decay length resolution due to the partial decay reconstruction. Finally, semileptonic b-hadron decays are inclusively selected and yield the data sample with the highest sensitivity to B-s(0) oscillations, as the much higher statistics compensate for the low average B-s(0) purity and poorer time resolution. A lower limit is set at Deltam(s) > 10.9 ps(-1) at 95%C.L., significantly lower than the expected limit of 15.2 ps(-1).
学科主题Physics ; Physics
类目[WOS]Physics, Particles & Fields
收录类别SCI
语种英语 ; 英语
WOS记录号WOS:000184639400001 ; WOS:000184639400001
公开日期2016-02-26
源URL[http://ir.ihep.ac.cn/handle/311005/212301]  
专题高能物理研究所_实验物理中心
作者单位中国科学院高能物理研究所
推荐引用方式
GB/T 7714		 ALEPH Collaboration. Improved search for B-S(0)-(B)over-bar(S)(0) oscillations, Improved search for B-S(0)-(B)over-bar(S)(0) oscillations[J]. EUROPEAN PHYSICAL JOURNAL C, EUROPEAN PHYSICAL JOURNAL C,2003, 2003,29, 29(2):143-170, 143-170.
APA ALEPH Collaboration.(2003).Improved search for B-S(0)-(B)over-bar(S)(0) oscillations.EUROPEAN PHYSICAL JOURNAL C,29(2),143-170.
MLA ALEPH Collaboration."Improved search for B-S(0)-(B)over-bar(S)(0) oscillations".EUROPEAN PHYSICAL JOURNAL C 29.2(2003):143-170.

入库方式： OAI收割

来源：高能物理研究所

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