W Z plus missing-ET signal from gaugino pair production at LHC7

被引：8

作者：

Baer, Howard ^{[1
]}

Barger, Vernon ^{[2
]}

Kraml, Sabine ^{[3
]}

Lessa, Andre ^{[4
]}

Sreethawong, Warintorn ^{[1
]}

Tata, Xerxes ^{[5
]}

机构：

[1] Univ Oklahoma, Dept Phys & Astron, Norman, OK 73019 USA

[2] Univ Wisconsin, Dept Phys, Madison, WI 53706 USA

[3] UJF Grenoble 1, Lab Phys Subatom & Cosmol, CNRS, INPG,IN2P3, F-38026 Grenoble, France

[4] Univ Sao Paulo, Inst Fis, BR-01498 Sao Paulo, Brazil

[5] Univ Hawaii, Dept Phys & Astron, Honolulu, HI 96822 USA

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2012年 / 03期

基金：

巴西圣保罗研究基金会;

关键词：

Supersymmetry Phenomenology; GRAND UNIFIED THEORIES; LARGE HADRON COLLIDER; MINIMAL SUPERGRAVITY; TRANSVERSE-MOMENTUM; ATLAS DETECTOR; SQUARK DECAYS; FINAL-STATES; SUPERSYMMETRY; GLUINO; NATURALNESS;

D O I：

10.1007/JHEP03(2012)092

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：

LHC searches for supersymmetry currently focus on strongly produced sparticles, which are copiously produced if gluinos and squarks have masses of a few hundred GeV. However, in supersymmetric models with heavy scalars, as favored by the decoupling solution to the SUSY flavor and CP problems, and m((g) over tilde) greater than or similar to 500 GeV as indicated by recent LHC results, chargino-neutralino ((W) over tilde (+/-)(1)(Z) over tilde (2)) production is the dominant cross section for m((W) over tilde1) similar to m((Z) over tilde2) < m(<(g)over tilde>)/3 at LHC with root s = 7 TeV (LHC7). Furthermore, if m((Z) over tilde1) + (m (Z) over tilde) less than or similar to m((Z) over tilde2) less than or similar to m((Z) over tilde1) + m(h), then (Z) over tilde (2) dominantly decays via (Z) over tilde (2) -> (Z) over tilde (1)Z, while (W) over tilde (1) decays via (W) over tilde (1) -> (Z) over tilde W-1. We investigate the LHC7 reach in the W Z + (sic)T channel (for both leptonic and hadronic decays of the W boson) in models with and without the assumption of gaugino mass universality. In the case of the mSUGRA/CMSSM model with heavy squark masses, the LHC7 discovery reach in the W Z+ (sic)T channel becomes competetive with the reach in the canonical (sic)T + jets channel for integrated luminosities similar to 30 fb(-1). We also present the LHC7 reach for a simplified model with arbitrary m((Z) over tilde1) and m((W) over tilde1) similar to m((Z) over tilde2). Here, we find a reach of up to m((W) over tilde1) similar to 200 (250) GeV for 10 (30) fb(-1).

引用

页数：19

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