Multiphoton signatures of goldstini at the LHC

被引：9

作者：

Ferretti, Gabriele ^{[1
]}

Mariotti, Alberto ^{[2
]}

Mawatari, Kentarou ^{[3
,5
]}

Petersson, Christoffer ^{[1
,4
,5
]}

机构：

[1] Chalmers Univ Technol, Dept Fundamental Phys, S-41296 Gothenburg, Sweden

[2] Univ Durham, Dept Phys, Inst Particle Phys Phenomenol, Durham DH1 3LE, England

[3] Vrije Univ Brussel, IIHE ELEM, B-1050 Brussels, Belgium

[4] Univ Libre Bruxelles, B-1050 Brussels, Belgium

[5] Int Solvay Inst, B-1050 Brussels, Belgium

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2014年 / 04期

基金：

瑞典研究理事会;

关键词：

Supersymmetry Phenomenology; SUPERSYMMETRY-BREAKING; REALIZATION;

D O I：

10.1007/JHEP04(2014)126

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 study models of gauge mediated SUSY breaking with more than one hidden sector. In these models the neutralino sector of the MSSM is supplemented with additional light neutral fermions, the nearly massless gravitino and the massive pseudo-goldstini. For the case where the Bino is the lightest ordinary SUSY particle, its preferred decay is to a photon and the heaviest pseudo-goldstino, which generically cascades down to lighter pseudo-goldstini, or to the gravitino, in association with photons. This gives rise to multiphoton plus missing energy signatures at the LHC. We investigate in detail simplified models where the SUSY spectrum consists of the right-handed sleptons, a Bino-like neutralino, the pseudo-goldstini and the gravitino. We compare against existing LHC searches and show that the sensitivity to our models could be significantly improved by relaxing the kinematic cuts and requiring additional final state particles. We propose inclusive searches in the final states (>= 3) gamma + (E) over bar (T) and l (+) l(-) + ( >= 2)gamma +(E) over bar (T), the former being sensitive to any production mode and the latter being optimized for slepton pair production. We show that they could lead to an observation (or strong constraints) already with the data set from LHC Run I, and present prospects for LHC Run II.

引用

页数：30

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