Resurrecting light stops after the 125 GeV Higgs in the baryon number violating CMSSM

被引：11
作者：
Chamoun, N. [1 ,2 ,3 ]
Dreiner, H. K. [2 ,3 ]
Staub, F. [2 ,3 ]
Stefaniak, T. [2 ,3 ]
机构：
[1] Dept Phys, HIAST, Damascus, Syria
[2] Univ Bonn, Inst Phys, D-53115 Bonn, Germany
[3] Univ Bonn, Bethe Ctr Theoret Phys, D-53115 Bonn, Germany
来源：
JOURNAL OF HIGH ENERGY PHYSICS | 2014年 / 08期
关键词：
Supersymmetry Phenomenology; ONE-LOOP CORRECTIONS; BOSON MASSES; 2-LOOP CORRECTIONS; EXCLUSION BOUNDS; MU-PROBLEM; MSSM; BREAKING; SARAH; TOOL; SUPERSYMMETRY;
D O I：
10.1007/JHEP08(2014)142
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：
In order to accommodate the observed Higgs boson mass in the CMSSM, the stops must either be very heavy or the mixing in the stop sector must be very large. Lower stop masses, possibly more accessible at the LHC, still give the correct Higgs mass only if the trilinear stop mixing parameter vertical bar A(t)vertical bar is in the multi-TeV range. Recently it has been shown that such large stop mixing leads to an unstable electroweak vacuum which spontaneously breaks charge or color. In this work we therefore go beyond the CMSSM and investigate the effects of including baryon number violating operators lambda ''(U) over bar(D) over bar(D) over bar on the stop and Higgs sectors. We find that for lambda '' similar or equal to O(0.3) light stop masses as low as 220 GeV are consistent with the observed Higgs mass as well as flavour constraints while allowing for a stable vacuum. The light stop in this scenario is often the lightest supersymmetric particle. We furthermore discuss the importance of the one-loop corrections involving R-parity violating couplings for a valid prediction of the light stop masses.
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页数：27
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