Study of ATLAS sensitivity to FCNC top decays

被引：44

作者：

Carvalho, J. ^{[1
]}

Castro, N.

Chikovani, L.

Djobava, T.

Dodd, J.

McGrath, S.

Onofre, A.

Parsons, J.

Veloso, F.

机构：

[1] Univ Coimbra, Dept Fis, LIP, P-3004516 Coimbra, Portugal

[2] E Andronikashvili Inst Phys, Tbilisi, Georgia

[3] Tbilisi State Univ, Inst High Energy Phys, Tbilisi, Georgia

[4] Columbia Univ, CU, Nevis Labs, Irvington, NY 10533 USA

来源：

EUROPEAN PHYSICAL JOURNAL C | 2007年 / 52卷 / 04期

关键词：

D O I：

10.1140/epjc/s10052-007-0434-0

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

The ATLAS experiment sensitivity to top quark flavour changing neutral current (FCNC) decays was studied at LHC using tt events. While one of the top quarks is expected to follow the dominant Standard Model decay t -> bW, the other decays through a FCNC channel, i.e. t -> Zu(c), t -> gamma u(c) or t -> gu(c). Different types of analyses, applied to each FCNC decay mode, were compared. The FCNC branching ratio sensitivity (assuming a 5 sigma signal significance) and 95% confidence level limits on the branching ratios (in the hypothesis of signal absence) were obtained.

引用

页码：999 / 1019

页数：21

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