TY - JOUR
T1 - Light nondegenerate squarks at the LHC
AU - Mahbubani, Rakhi
AU - Papucci, Michele
AU - Perez, Gilad
AU - Ruderman, Joshua T.
AU - Weiler, Andreas
N1 - GIF; Gruber Foundation; IRG; ISF; Minerva; Miller Institute for Basic Research in Science; German Science Foundation (DFG) [Collaborative Research Center (SFB) 676]; Office of Science, Office of High Energy Physics, of the U.S. Department of Energy [DE-AC02-05CH11231]We thank C. Autermann, M. d'Onofrio, W. Ehrenfeld, A. Hoecker, P. Pralavorio, S. Sharma, and G. Weiglein for discussions. We thank T. Plehn and D. Lopez-Val for providing comparisons with MadGOLEM and A. Kulesza and S. Thewes for support with NLLfast. R. M. thanks J. Alwall, J. Gallicchio, E. Izaguirre, O. Mattelaer, V. Sanz, and P. Skands for helpful conversations. R. M., M. P., and A. W. thank the CERN TH group for its warm hospitality. M. P. thanks the Aspen Center for Physics where some of these results were obtained. G. P. is supported by the grants from GIF, the Gruber Foundation, IRG, ISF, and Minerva. J. T. R. is supported by the Miller Institute for Basic Research in Science. The work of A. W. was supported in part by the German Science Foundation (DFG) under the Collaborative Research Center (SFB) 676. M. P. is supported in part by the Director, Office of Science, Office of High Energy Physics, of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231.
PY - 2013/4/10
Y1 - 2013/4/10
N2 - Experimental bounds on squarks of the first two generations assume their masses to be eightfold degenerate and consequently constrain them to be heavier than ∼1.4 TeV when the gluino is lighter than 2.5 TeV. The assumption of squark-mass universality is neither a direct consequence of minimal flavor violation (MFV), which allows for splittings within squark generations, nor a prediction of supersymmetric alignment models, which allow for splittings between generations. We reinterpret a recent CMS multijet plus missing energy search allowing for deviations from U(2) universality and find significantly weakened squark bounds: A 400 GeV second-generation squark singlet is allowed, even with exclusive decays to a massless neutralino, and, in an MFV scenario, the down-type squark singlets can be as light as 600 GeV, provided the up-type singlets are pushed up to 1.8 TeV, for a 1.5 TeV gluino and decoupled doublet squarks.
AB - Experimental bounds on squarks of the first two generations assume their masses to be eightfold degenerate and consequently constrain them to be heavier than ∼1.4 TeV when the gluino is lighter than 2.5 TeV. The assumption of squark-mass universality is neither a direct consequence of minimal flavor violation (MFV), which allows for splittings within squark generations, nor a prediction of supersymmetric alignment models, which allow for splittings between generations. We reinterpret a recent CMS multijet plus missing energy search allowing for deviations from U(2) universality and find significantly weakened squark bounds: A 400 GeV second-generation squark singlet is allowed, even with exclusive decays to a massless neutralino, and, in an MFV scenario, the down-type squark singlets can be as light as 600 GeV, provided the up-type singlets are pushed up to 1.8 TeV, for a 1.5 TeV gluino and decoupled doublet squarks.
UR - http://www.scopus.com/inward/record.url?scp=84876271547&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.110.151804
DO - 10.1103/PhysRevLett.110.151804
M3 - مقالة
SN - 0031-9007
VL - 110
JO - Physical review letters
JF - Physical review letters
IS - 15
M1 - 151804
ER -