Abstract
Stop searches in supersymmetric frameworks with R-parity conservation usually assume the lightest neutralino to be the lightest supersymmetric particle. In this paper we consider an alternative scenario in which the left-handed tau sneutrino is lighter than neutralinos and stable at collider scales, but possibly unstable at cosmological scales. Moreover the (mostly right-handed) stop \( \overset{\sim }{t} \) is lighter than all electroweakinos, and heavier than the scalars of the third generation lepton doublet, whose charged component, \( \overset{\sim }{\tau } \), is heavier than the neutral one, \( \overset{\sim }{\nu } \). The remaining supersymmetric particles are decoupled from the stop phenomenology. In most of the parameter space, the relevant stop decays are only into \( t\overset{\sim }{\tau}\tau \), \( t\overset{\sim }{\nu}\nu \) and \( b\overset{\sim }{\nu}\tau \) via off-shell electroweakinos. We constrain the branching ratios of these decays by recasting the most sensitive stop searches. Due to the “double invisible” kinematics of the \( \overset{\sim }{t}\to t\overset{\sim }{\nu}\nu \) process, and the low efficiency in tagging the \( t\overset{\sim }{\tau}\tau \) decay products, light stops are generically allowed. In the minimal supersymmetric standard model with ∼ 100 GeV sneutrinos, stops with masses as small as ∼ 350 GeV turn out to be allowed at 95% CL.
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ALEPH collaboration, R. Barate et al., Search for pair production of longlived heavy charged particles in e + e − annihilation, Phys. Lett. B 405 (1997) 379 [hep-ex/9706013] [INSPIRE].
DELPHI collaboration, P. Abreu et al., Search for heavy stable and longlived particles in e + e − collisions at \( \sqrt{s}=189 \) GeV, Phys. Lett. B 478 (2000) 65 [hep-ex/0103038] [INSPIRE].
OPAL collaboration, G. Abbiendi et al., Search for stable and longlived massive charged particles in e + e − collisions at \( \sqrt{s}=130 \) GeV to 209 GeV, Phys. Lett. B 572 (2003) 8 [hep-ex/0305031] [INSPIRE].
L3 collaboration, P. Achard et al., Search for heavy neutral and charged leptons in e + e − annihilation at LEP, Phys. Lett. B 517 (2001) 75 [hep-ex/0107015] [INSPIRE].
R. Kopeliansky, Search for charged long-lived particles with the ATLAS detector in pp collisions at \( \sqrt{s}=8 \) TeV, Ph.D. thesis, CERN-THESIS-2015-119, Technion Israel, (2015) [INSPIRE].
CMS collaboration, Search for long-lived charged particles in proton-proton collisions at \( \sqrt{s}=13 \) TeV, Phys. Rev. D 94 (2016) 112004 [arXiv:1609.08382] [INSPIRE].
ATLAS collaboration, SUSY searches with the ATLAS detector, ATL-PHYS-PROC-2017-005, CERN, Geneva Switzerland, (2017).
CMS collaboration, M. Kazana, Searches for supersymmetry with the CMS detector at the LHC, Acta Phys. Polon. B 47 (2016) 1489 [INSPIRE].
D.G. Cerdeno, C. Muñoz and O. Seto, Right-handed sneutrino as thermal dark matter, Phys. Rev. D 79 (2009) 023510 [arXiv:0807.3029] [INSPIRE].
C. Arina and M.E. Cabrera, Multi-lepton signatures at LHC from sneutrino dark matter, JHEP 04 (2014) 100 [arXiv:1311.6549] [INSPIRE].
J. Guo, Z. Kang, J. Li, T. Li and Y. Liu, Simplified supersymmetry with sneutrino LSP at 8 TeV LHC, JHEP 10 (2014) 164 [arXiv:1312.2821] [INSPIRE].
C. Arina, M.E.C. Catalan, S. Kraml, S. Kulkarni and U. Laa, Constraints on sneutrino dark matter from LHC Run 1, JHEP 05 (2015) 142 [arXiv:1503.02960] [INSPIRE].
G.F. Giudice and R. Rattazzi, Theories with gauge mediated supersymmetry breaking, Phys. Rept. 322 (1999) 419 [hep-ph/9801271] [INSPIRE].
A. Delgado, G. Nardini and M. Quirós, The light stop scenario from gauge mediation, JHEP 04 (2012) 137 [arXiv:1201.5164] [INSPIRE].
F. del Aguila, M. Quirós and F. Zwirner, Detecting E 6 neutral gauge bosons through lepton pairs at hadron colliders, Nucl. Phys. B 287 (1987) 419 [INSPIRE].
P. Langacker, The physics of heavy Z ′ gauge bosons, Rev. Mod. Phys. 81 (2009) 1199 [arXiv:0801.1345] [INSPIRE].
J. Scherk and J.H. Schwarz, How to get masses from extra dimensions, Nucl. Phys. B 153 (1979) 61 [INSPIRE].
I. Antoniadis, A possible new dimension at a few TeV, Phys. Lett. B 246 (1990) 377 [INSPIRE].
A. Pomarol and M. Quirós, The Standard Model from extra dimensions, Phys. Lett. B 438 (1998) 255 [hep-ph/9806263] [INSPIRE].
I. Antoniadis, S. Dimopoulos, A. Pomarol and M. Quirós, Soft masses in theories with supersymmetry breaking by TeV compactification, Nucl. Phys. B 544 (1999) 503 [hep-ph/9810410] [INSPIRE].
A. Delgado, A. Pomarol and M. Quirós, Supersymmetry and electroweak breaking from extra dimensions at the TeV scale, Phys. Rev. D 60 (1999) 095008 [hep-ph/9812489] [INSPIRE].
M. Quirós, New ideas in symmetry breaking, hep-ph/0302189 [INSPIRE].
S. Dimopoulos, K. Howe and J. March-Russell, Maximally natural supersymmetry, Phys. Rev. Lett. 113 (2014) 111802 [arXiv:1404.7554] [INSPIRE].
I. Garcia Garcia, K. Howe and J. March-Russell, Natural Scherk-Schwarz theories of the weak scale, JHEP 12 (2015) 005 [arXiv:1510.07045] [INSPIRE].
A. Delgado, M. Garcia-Pepin, G. Nardini and M. Quirós, Natural supersymmetry from extra dimensions, Phys. Rev. D 94 (2016) 095017 [arXiv:1608.06470] [INSPIRE].
M. Carena, S. Gori, N.R. Shah, C.E.M. Wagner and L.-T. Wang, Light stops, light staus and the 125 GeV Higgs, JHEP 08 (2013) 087 [arXiv:1303.4414] [INSPIRE].
T. Falk, K.A. Olive and M. Srednicki, Heavy sneutrinos as dark matter, Phys. Lett. B 339 (1994) 248 [hep-ph/9409270] [INSPIRE].
C. Arina and N. Fornengo, Sneutrino cold dark matter, a new analysis: relic abundance and detection rates, JHEP 11 (2007) 029 [arXiv:0709.4477] [INSPIRE].
PandaX-II collaboration, A. Tan et al., Dark matter results from first 98.7 days of data from the PandaX-II experiment, Phys. Rev. Lett. 117 (2016) 121303 [arXiv:1607.07400] [INSPIRE].
LUX collaboration, D.S. Akerib et al., Results from a search for dark matter in the complete LUX exposure, Phys. Rev. Lett. 118 (2017) 021303 [arXiv:1608.07648] [INSPIRE].
P.J. Fox, A.E. Nelson and N. Weiner, Dirac gaugino masses and supersoft supersymmetry breaking, JHEP 08 (2002) 035 [hep-ph/0206096] [INSPIRE].
C. Arina, M. Chala, V. Martin-Lozano and G. Nardini, Confronting SUSY models with LHC data via electroweakino production, JHEP 12 (2016) 149 [arXiv:1610.03822] [INSPIRE].
C. Han, J. Ren, L. Wu, J.M. Yang and M. Zhang, Top-squark in natural SUSY under current LHC Run 2 data, Eur. Phys. J. C 77 (2017) 93 [arXiv:1609.02361] [INSPIRE].
M. Drees and M.M. Nojiri, Production and decay of scalar stoponium bound states, Phys. Rev. D 49 (1994) 4595 [hep-ph/9312213] [INSPIRE].
S.P. Martin, Diphoton decays of stoponium at the Large Hadron Collider, Phys. Rev. D 77 (2008) 075002 [arXiv:0801.0237] [INSPIRE].
G.T. Bodwin, H.S. Chung and C.E.M. Wagner, Higgs-stoponium mixing near the stop-antistop threshold, Phys. Rev. D 95 (2017) 015013 [arXiv:1609.04831] [INSPIRE].
M. Carena, S. Gori, N.R. Shah, C.E.M. Wagner and L.-T. Wang, Light stau phenomenology and the Higgs γγ rate, JHEP 07 (2012) 175 [arXiv:1205.5842] [INSPIRE].
G. Marandella, C. Schappacher and A. Strumia, Supersymmetry and precision data after LEP2, Nucl. Phys. B 715 (2005) 173 [hep-ph/0502095] [INSPIRE].
ATLAS collaboration, Search for the supersymmetric partner of the top quark in the jets + E missT final state at \( \sqrt{s}=13 \) TeV, ATLAS-CONF-2016-077, CERN, Geneva Switzerland, (2016).
CMS collaboration, Search for direct top squark pair production in the fully hadronic final state in proton-proton collisions at \( \sqrt{s}=13 \) TeV corresponding to an integrated luminosity of 12.9 fb −1, CMS-PAS-SUS-16-029, CERN, Geneva Switzerland, (2016).
ATLAS collaboration, Search for top-squark pair production in final states with two tau leptons, jets and missing transverse momentum in \( \sqrt{s}=13 \) TeV pp-collisions with the ATLAS detector, ATLAS-CONF-2016-048, CERN, Geneva Switzerland, (2016).
D.S.M. Alves, J. Liu and N. Weiner, Hiding missing energy in missing energy, JHEP 04 (2015) 088 [arXiv:1312.4965] [INSPIRE].
E. Conte, B. Fuks and G. Serret, MadAnalysis 5, a user-friendly framework for collider phenomenology, Comput. Phys. Commun. 184 (2013) 222 [arXiv:1206.1599] [INSPIRE].
E. Conte, B. Dumont, B. Fuks and C. Wymant, Designing and recasting LHC analyses with MadAnalysis 5, Eur. Phys. J. C 74 (2014) 3103 [arXiv:1405.3982] [INSPIRE].
R. Brun and F. Rademakers, ROOT: an object oriented data analysis framework, Nucl. Instrum. Meth. A 389 (1997) 81 [INSPIRE].
M. Cacciari, G.P. Salam and G. Soyez, FastJet user manual, Eur. Phys. J. C 72 (2012) 1896 [arXiv:1111.6097] [INSPIRE].
A.L. Read, Presentation of search results: the CL s technique, J. Phys. G 28 (2002) 2693 [INSPIRE].
J. Alwall et al., The automated computation of tree-level and next-to-leading order differential cross sections and their matching to parton shower simulations, JHEP 07 (2014) 079 [arXiv:1405.0301] [INSPIRE].
T. Sjöstrand, S. Mrenna and P.Z. Skands, PYTHIA 6.4 physics and manual, JHEP 05 (2006) 026 [hep-ph/0603175] [INSPIRE].
F. Staub, SARAH 4: a tool for (not only SUSY) model builders, Comput. Phys. Commun. 185 (2014) 1773 [arXiv:1309.7223] [INSPIRE].
W. Porod and F. Staub, SPheno 3.1: extensions including flavour, CP-phases and models beyond the MSSM, Comput. Phys. Commun. 183 (2012) 2458 [arXiv:1104.1573] [INSPIRE].
M. Carena, G. Nardini, M. Quirós and C.E.M. Wagner, The effective theory of the light stop scenario, JHEP 10 (2008) 062 [arXiv:0806.4297] [INSPIRE].
F. Capela and G. Nardini, Hairy black holes in massive gravity: thermodynamics and phase structure, Phys. Rev. D 86 (2012) 024030 [arXiv:1203.4222] [INSPIRE].
S. Clesse and J. Garc´ıa-Bellido, The clustering of massive primordial black holes as dark matter: measuring their mass distribution with advanced LIGO, Phys. Dark Univ. 10 (2016) 002 [arXiv:1603.05234] [INSPIRE].
S. Bird et al., Did LIGO detect dark matter?, Phys. Rev. Lett. 116 (2016) 201301 [arXiv:1603.00464] [INSPIRE].
S. McGaugh, F. Lelli and J. Schombert, Radial acceleration relation in rotationally supported galaxies, Phys. Rev. Lett. 117 (2016) 201101 [arXiv:1609.05917] [INSPIRE].
G. Gelmini and P. Gondolo, DM production mechanisms, in Particle dark matter, G. Bertone ed., Cambridge University Press, Cambridge U.K., (2010), pg. 121 [arXiv:1009.3690] [INSPIRE].
G. Nardini and N. Sahu, Re-reheating, late entropy injection and constraints from baryogenesis scenarios, arXiv:1109.2829 [INSPIRE].
H.K. Dreiner, An introduction to explicit R-parity violation, Adv. Ser. Direct. High Energy Phys. 21 (2010) 565 [hep-ph/9707435] [INSPIRE].
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Chala, M., Delgado, A., Nardini, G. et al. A light sneutrino rescues the light stop. J. High Energ. Phys. 2017, 97 (2017). https://doi.org/10.1007/JHEP04(2017)097
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DOI: https://doi.org/10.1007/JHEP04(2017)097