Vertex displacements for acausal particles: testing the Lee-Wick standard model at the LHC

被引：15

作者：

Alvarez, Ezequiel ^{[1
,2
]}

Da Rold, Leandro ^{[3
,4
]}

Schat, Carlos ^{[1
,2
,5
]}

Szynkman, Alejandro ^{[6
]}

机构：

[1] Univ Buenos Aires, IFIBA, CONICET, RA-1428 Buenos Aires, DF, Argentina

[2] Univ Buenos Aires, FCEyN, Dept Fis, RA-1428 Buenos Aires, DF, Argentina

[3] Consejo Nacl Invest Cient & Tecn, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina

[4] Ctr Atom Bariloche, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina

[5] Ohio Univ, Dept Phys & Astron, Athens, OH 45701 USA

[6] Univ Montreal, Montreal, PQ H3C 3J7, Canada

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2009年 / 10期

关键词：

Beyond Standard Model; Rare Decays; PHYSICS EVENT GENERATION; B-HADRON LIFETIME;

D O I：

10.1088/1126-6708/2009/10/023

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：

We propose to search for wrong displaced vertices, where decay products of the secondary vertex move towards the primary vertex instead of away from it, as a signature for microscopic violation of causality. We analyze in detail the leptonic sector of the recently proposed Lee-Wick Standard Model, which provides a well motivated framework to study acausal effects. We find that, assuming Minimal Flavor Violation, the Lee-Wick partners of the electron, (l) over tilde (e) and (e) over tilde, can produce measurable wrong vertices at the LHC, the most promising channel being q (q) over bar -> (l) over tilde (e) (l) over tilde (e) -> e(+)e(-) jjjj. A Monte-Carlo simulation using MadGraph/MadEvent suggests that for M-l less than or similar to 450 GeV the measurement of these acausal vertex displacements should be accessible in the LHC era.

引用

页数：24

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