Abstract
We study the viability of having two relatively light top squarks (‘stops’) in the framework of the Next-to-Minimal Supersymmetric Standard Model (NMSSM). Such light stops render the NMSSM rather ‘natural’. These are shown to be allowed by the relevant direct searches at the Large Hadron Collider (LHC) and to be compatible with the latest LHC results on the Higgs sector, other low energy electroweak constraints and recent constraints from the dark matter (DM) sector. We propose dedicated searches for such light stops at the LHC within a ‘simplified’ scenario that may have a bino-like or a singlino-like neutralino LSP as the DM candidate and point out various final states carrying the imprint of their collective presence. Under certain circumstances, in such a scenario, presence of two light stops may give rise to final states which are not so typical in their search. Thorough studies at the detector level reveal the status of such a scenario after the 8 TeV run of the LHC and shed light on the prospects of its 13 and 14 TeV runs. In favorable regions of the NMSSM parameter space, with low-lying spectra, signals with significance ≳ 5σ are possible with a few tens to a few hundreds of fb−1 of integrated luminosity in diverse final states.
Article PDF
Similar content being viewed by others
Explore related subjects
Discover the latest articles, news and stories from top researchers in related subjects.Avoid common mistakes on your manuscript.
References
ATLAS collaboration, Observation of a new particle in the search for the standard model Higgs boson with the ATLAS detector at the LHC, Phys. Lett. B 716 (2012) 1 [arXiv:1207.7214] [INSPIRE].
CMS collaboration, Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC, Phys. Lett. B 716 (2012) 30 [arXiv:1207.7235] [INSPIRE].
Z. Marshall, Searches for strongly produced SUSY at LHC, talk given at Rencontres de Moriond 2015 , March 21-28, La Thuile, Italy (2015).
S. Folgueras, Searches for weakly produced SUSY at LHC, talk given at Rencontres de Moriond 2015 , March 21-28, La Thuile, Italy (2015).
R. Barbieri and A. Strumia, The ‘LEP paradox’, hep-ph/0007265.
U. Ellwanger, C. Hugonie and A.M. Teixeira, The next-to-minimal supersymmetric standard model, Phys. Rept. 496 (2010) 1 [arXiv:0910.1785] [INSPIRE].
S. Chang, P.J. Fox and N. Weiner, Naturalness and Higgs decays in the MSSM with a singlet, JHEP 08 (2006) 068 [hep-ph/0511250] [INSPIRE].
R. Dermisek and J.F. Gunion, A comparison of mixed-Higgs scenarios in the NMSSM and the MSSM, Phys. Rev. D 77 (2008) 015013 [arXiv:0709.2269] [INSPIRE].
Z. Kang, J. Li and T. Li, On naturalness of the MSSM and NMSSM, JHEP 11 (2012) 024 [arXiv:1201.5305] [INSPIRE].
J.-J. Cao, Z.-X. Heng, J.M. Yang, Y.-M. Zhang and J.-Y. Zhu, A SM-like Higgs near 125 GeV in low energy SUSY: a comparative study for MSSM and NMSSM, JHEP 03 (2012) 086 [arXiv:1202.5821] [INSPIRE].
K. Agashe, Y. Cui and R. Franceschini, Natural Islands for a 125 GeV Higgs in the scale-invariant NMSSM, JHEP 02 (2013) 031 [arXiv:1209.2115] [INSPIRE].
D. Curtin, P. Meade and P.-J. Tien, Natural SUSY in plain sight, Phys. Rev. D 90 (2014) 115012 [arXiv:1406.0848] [INSPIRE].
J.E. Kim and H.P. Nilles, The μ problem and the strong CP problem, Phys. Lett. B 138 (1984) 150 [INSPIRE].
O. Stal and G. Weiglein, Light NMSSM Higgs bosons in SUSY cascade decays at the LHC, JHEP 01 (2012) 071 [arXiv:1108.0595] [INSPIRE].
J.F. Gunion, Y. Jiang and S. Kraml, The constrained NMSSM and Higgs near 125 GeV, Phys. Lett. B 710 (2012) 454 [arXiv:1201.0982] [INSPIRE].
S.F. King, M. Mühlleitner and R. Nevzorov, NMSSM Higgs benchmarks near 125 GeV, Nucl. Phys. B 860 (2012) 207 [arXiv:1201.2671] [INSPIRE].
J.F. Gunion, Y. Jiang and S. Kraml, Could two NMSSM Higgs bosons be present near 125 GeV?, Phys. Rev. D 86 (2012) 071702 [arXiv:1207.1545] [INSPIRE].
S.F. King, M. Mühlleitner, R. Nevzorov and K. Walz, Natural NMSSM Higgs bosons, Nucl. Phys. B 870 (2013) 323 [arXiv:1211.5074] [INSPIRE].
J. Cao, F. Ding, C. Han, J.M. Yang and J. Zhu, A light Higgs scalar in the NMSSM confronted with the latest LHC Higgs data, JHEP 11 (2013) 018 [arXiv:1309.4939] [INSPIRE].
S.F. King, M. Mühlleitner, R. Nevzorov and K. Walz, Discovery prospects for NMSSM Higgs bosons at the high-energy Large Hadron Collider, Phys. Rev. D 90 (2014) 095014 [arXiv:1408.1120] [INSPIRE].
U. Ellwanger and C. Hugonie, Neutralino cascades in the (M+1)SSM, Eur. Phys. J. C 5 (1998) 723 [hep-ph/9712300] [INSPIRE].
U. Ellwanger and C. Hugonie, Topologies of the (M+1)SSM with a singlino LSP at LEP-2, Eur. Phys. J. C 13 (2000) 681 [hep-ph/9812427] [INSPIRE].
A. Dedes, C. Hugonie, S. Moretti and K. Tamvakis, Phenomenology of a new minimal supersymmetric extension of the standard model, Phys. Rev. D 63 (2001) 055009 [hep-ph/0009125] [INSPIRE].
S.Y. Choi, D.J. Miller and P.M. Zerwas, The neutralino sector of the next-to-minimal supersymmetric standard model, Nucl. Phys. B 711 (2005) 83 [hep-ph/0407209] [INSPIRE].
K. Cheung and T.-J. Hou, Light pseudoscalar Higgs boson in neutralino decays in the next-to-minimal supersymmetric standard model, Phys. Lett. B 674 (2009) 54 [arXiv:0809.1122] [INSPIRE].
D.G. Cerdeño, P. Ghosh, C.B. Park and M. Peiró, Collider signatures of a light NMSSM pseudoscalar in neutralino decays in the light of LHC results, JHEP 02 (2014) 048 [arXiv:1307.7601] [INSPIRE].
D. Das, U. Ellwanger and A.M. Teixeira, Modified signals for supersymmetry in the NMSSM with a singlino-like LSP, JHEP 04 (2012) 067 [arXiv:1202.5244] [INSPIRE].
D. Das, U. Ellwanger and A.M. Teixeira, LHC constraints on M 1/2 and m 0 in the semi-constrained NMSSM, JHEP 04 (2013) 117 [arXiv:1301.7584] [INSPIRE].
S. Kraml, A.R. Raklev and M.J. White, NMSSM in disguise: discovering singlino dark matter with soft leptons at the LHC, Phys. Lett. B 672 (2009) 361 [arXiv:0811.0011] [INSPIRE].
G. Panotopoulos, The degenerate scenario in the NMSSM: direct singlino-like neutralino searches with a gravitino LSP, arXiv:1103.0140.
U. Ellwanger, Testing the higgsino-singlino sector of the NMSSM with trileptons at the LHC, JHEP 11 (2013) 108 [arXiv:1309.1665] [INSPIRE].
U. Ellwanger and A.M. Teixeira, NMSSM with a singlino LSP: possible challenges for searches for supersymmetry at the LHC, JHEP 10 (2014) 113 [arXiv:1406.7221] [INSPIRE].
X.-J. Bi, Q.-S. Yan and P.-F. Yin, Light stop/sbottom pair production searches in the NMSSM, Phys. Rev. D 87 (2013) 035007 [arXiv:1209.2703] [INSPIRE].
J. Guo, Z. Kang, J. Li and T. Li, Implications of Higgs sterility for the Higgs and stop sectors, arXiv:1308.3075 [INSPIRE].
A. Chakraborty, D.K. Ghosh, S. Mondal, S. Poddar and D. Sengupta, Probing the NMSSM via Higgs boson signatures from stop cascade decays at the LHC, Phys. Rev. D 91 (2015) 115018 [arXiv:1503.07592] [INSPIRE].
T. Cheng, J. Li, T. Li and Q.-S. Yan, Natural NMSSM confronting with the LHC7-8, Phys. Rev. D 89 (2014) 015015 [arXiv:1304.3182] [INSPIRE].
ATLAS, CMS collaboration, M. Flechl, Higgs physics: review of recent results and prospects from ATLAS and CMS, J. Phys. Conf. Ser. 631 (2015) 012028 [arXiv:1503.00632] [INSPIRE].
U. Ellwanger, Higgs bosons in the next-to-minimal supersymmetric standard model at the LHC, Eur. Phys. J. C 71 (2011) 1782 [arXiv:1108.0157] [INSPIRE].
R. Barbieri, L.J. Hall, Y. Nomura and V.S. Rychkov, Supersymmetry without a light Higgs boson, Phys. Rev. D 75 (2007) 035007 [hep-ph/0607332] [INSPIRE].
R. Barbieri, L.J. Hall, A.Y. Papaioannou, D. Pappadopulo and V.S. Rychkov, An alternative NMSSM phenomenology with manifest perturbative unification, JHEP 03 (2008) 005 [arXiv:0712.2903] [INSPIRE].
Y. Okada, M. Yamaguchi and T. Yanagida, Upper bound of the lightest Higgs boson mass in the minimal supersymmetric standard model, Prog. Theor. Phys. 85 (1991) 1 [INSPIRE].
J.R. Ellis, G. Ridolfi and F. Zwirner, Radiative corrections to the masses of supersymmetric Higgs bosons, Phys. Lett. B 257 (1991) 83 [INSPIRE].
H.E. Haber and R. Hempfling, Can the mass of the lightest Higgs boson of the minimal supersymmetric model be larger than m(Z)?, Phys. Rev. Lett. 66 (1991) 1815 [INSPIRE].
M. Carena, J.R. Espinosa, M. Quirós and C.E.M. Wagner, Analytical expressions for radiatively corrected Higgs masses and couplings in the MSSM, Phys. Lett. B 355 (1995) 209 [hep-ph/9504316] [INSPIRE].
M. Carena, M. Quirós and C.E.M. Wagner, Effective potential methods and the Higgs mass spectrum in the MSSM, Nucl. Phys. B 461 (1996) 407 [hep-ph/9508343] [INSPIRE].
H.E. Haber, R. Hempfling and A.H. Hoang, Approximating the radiatively corrected Higgs mass in the minimal supersymmetric model, Z. Phys. C 75 (1997) 539 [hep-ph/9609331] [INSPIRE].
A. Djouadi, The Anatomy of electro-weak symmetry breaking. II. The Higgs bosons in the minimal supersymmetric model, Phys. Rept. 459 (2008) 1 [hep-ph/0503173] [INSPIRE].
A. Arbey, M. Battaglia, A. Djouadi, F. Mahmoudi and J. Quevillon, Implications of a 125 GeV Higgs for supersymmetric models, Phys. Lett. B 708 (2012) 162 [arXiv:1112.3028] [INSPIRE].
P. Draper, P. Meade, M. Reece and D. Shih, Implications of a 125 GeV Higgs for the MSSM and low-scale SUSY breaking, Phys. Rev. D 85 (2012) 095007 [arXiv:1112.3068] [INSPIRE].
M. Carena, S. Gori, N.R. Shah and C.E.M. Wagner, A 125 GeV SM-like Higgs in the MSSM and the γγ rate, JHEP 03 (2012) 014 [arXiv:1112.3336] [INSPIRE].
D. Carmi, A. Falkowski, E. Kuflik and T. Volansky, Interpreting LHC Higgs results from natural new physics perspective, JHEP 07 (2012) 136 [arXiv:1202.3144] [INSPIRE].
A. Arbey, M. Battaglia, A. Djouadi and F. Mahmoudi, The Higgs sector of the phenomenological MSSM in the light of the Higgs boson discovery, JHEP 09 (2012) 107 [arXiv:1207.1348] [INSPIRE].
P. Bechtle, S. Heinemeyer, O. Stal, T. Stefaniak, G. Weiglein and L. Zeune, MSSM interpretations of the LHC discovery: light or heavy Higgs?, Eur. Phys. J. C 73 (2013) 2354 [arXiv:1211.1955] [INSPIRE].
U. Ellwanger and C. Hugonie, The upper bound on the lightest Higgs mass in the NMSSM revisited, Mod. Phys. Lett. A 22 (2007) 1581 [hep-ph/0612133] [INSPIRE].
L.J. Hall, D. Pinner and J.T. Ruderman, A natural SUSY Higgs near 126 GeV, JHEP 04 (2012) 131 [arXiv:1112.2703] [INSPIRE].
A. Arvanitaki and G. Villadoro, A non standard model Higgs at the LHC as a sign of naturalness, JHEP 02 (2012) 144 [arXiv:1112.4835] [INSPIRE].
M. Papucci, J.T. Ruderman and A. Weiler, Natural SUSY endures, JHEP 09 (2012) 035 [arXiv:1110.6926] [INSPIRE].
U. Ellwanger, J.F. Gunion and C. Hugonie, NMHDECAY: a Fortran code for the Higgs masses, couplings and decay widths in the NMSSM, JHEP 02 (2005) 066 [hep-ph/0406215] [INSPIRE].
U. Ellwanger and C. Hugonie, NMHDECAY 2.0: an updated program for sparticle masses, Higgs masses, couplings and decay widths in the NMSSM, Comput. Phys. Commun. 175 (2006) 290 [hep-ph/0508022] [INSPIRE].
U. Ellwanger and C. Hugonie, NMSPEC: a Fortran code for the sparticle and Higgs masses in the NMSSM with GUT scale boundary conditions, Comput. Phys. Commun. 177 (2007) 399 [hep-ph/0612134] [INSPIRE].
U. Ellwanger, G. Espitalier-Noel and C. Hugonie, Naturalness and fine tuning in the NMSSM: implications of early LHC results, JHEP 09 (2011) 105 [arXiv:1107.2472] [INSPIRE].
D. Das, U. Ellwanger and A.M. Teixeira, NMSDECAY: a Fortran code for supersymmetric particle decays in the next-to-minimal supersymmetric standard model, Comput. Phys. Commun. 183 (2012) 774 [arXiv:1106.5633] [INSPIRE].
M. Muhlleitner, A. Djouadi and Y. Mambrini, SDECAY: a Fortran code for the decays of the supersymmetric particles in the MSSM, Comput. Phys. Commun. 168 (2005) 46 [hep-ph/0311167] [INSPIRE].
M. Carena, S. Heinemeyer, O. St al, C.E.M. Wagner and G. Weiglein, MSSM Higgs boson searches at the LHC: benchmark scenarios after the discovery of a Higgs-like particle, Eur. Phys. J. C 73 (2013) 2552 [arXiv:1302.7033] [INSPIRE].
ATLAS, CMS collaboration, Combined measurement of the Higgs boson mass in pp collisions at \( \sqrt{s}=7 \) and 8 TeV with the ATLAS and CMS experiments, Phys. Rev. Lett. 114 (2015) 191803 [arXiv:1503.07589] [INSPIRE].
M.D. Goodsell, K. Nickel and F. Staub, Two-loop corrections to the Higgs masses in the NMSSM, Phys. Rev. D 91 (2015) 035021 [arXiv:1411.4665] [INSPIRE].
S. Heinemeyer, W. Hollik and G. Weiglein, FeynHiggs: a program for the calculation of the masses of the neutral CP even Higgs bosons in the MSSM, Comput. Phys. Commun. 124 (2000) 76 [hep-ph/9812320] [INSPIRE].
S. Heinemeyer, W. Hollik and G. Weiglein, The masses of the neutral CP-even Higgs bosons in the MSSM: Accurate analysis at the two loop level, Eur. Phys. J. C 9 (1999) 343 [hep-ph/9812472] [INSPIRE].
G. Degrassi, S. Heinemeyer, W. Hollik, P. Slavich and G. Weiglein, Towards high precision predictions for the MSSM Higgs sector, Eur. Phys. J. C 28 (2003) 133 [hep-ph/0212020] [INSPIRE].
M. Frank, T. Hahn, S. Heinemeyer, W. Hollik, H. Rzehak and G. Weiglein, The Higgs boson masses and mixings of the complex MSSM in the Feynman-diagrammatic approach, JHEP 02 (2007) 047 [hep-ph/0611326] [INSPIRE].
T. Hahn, S. Heinemeyer, W. Hollik, H. Rzehak and G. Weiglein, High-precision predictions for the light CP-even Higgs boson mass of the minimal supersymmetric standard model, Phys. Rev. Lett. 112 (2014) 141801 [arXiv:1312.4937] [INSPIRE].
A. Djouadi, J.-L. Kneur and G. Moultaka, SuSpect: a Fortran code for the supersymmetric and Higgs particle spectrum in the MSSM, Comput. Phys. Commun. 176 (2007) 426 [hep-ph/0211331] [INSPIRE].
N. Blinov and D.E. Morrissey, Charge and color breaking constraints in the minimal supersymmetric standard model, arXiv:1309.7397.
D. Chowdhury, R.M. Godbole, K.A. Mohan and S.K. Vempati, Charge and color breaking constraints in MSSM after the Higgs discovery at LHC, JHEP 02 (2014) 110 [arXiv:1310.1932] [INSPIRE].
U. Chattopadhyay and A. Dey, Exploring MSSM for charge and color breaking and other constraints in the context of Higgs@125 GeV, JHEP 11 (2014) 161 [arXiv:1409.0611] [INSPIRE].
J.E. Camargo-Molina, B. O’Leary, W. Porod and F. Staub, Stability of the CMSSM against sfermion VEVs, JHEP 12 (2013) 103 [arXiv:1309.7212] [INSPIRE].
J.E. Camargo-Molina, B. Garbrecht, B. O’Leary, W. Porod and F. Staub, Constraining the natural MSSM through tunneling to color-breaking vacua at zero and non-zero temperature, Phys. Lett. B 737 (2014) 156 [arXiv:1405.7376] [INSPIRE].
N. Blinov and D.E. Morrissey, Vacuum stability and the MSSM Higgs mass, JHEP 03 (2014) 106 [arXiv:1310.4174] [INSPIRE].
M. Bobrowski, G. Chalons, W.G. Hollik and U. Nierste, Vacuum stability of the effective Higgs potential in the Minimal Supersymmetric Standard Model, Phys. Rev. D 90 (2014) 035025 [arXiv:1407.2814] [INSPIRE].
K.-i. Hikasa and M. Kobayashi, Light scalar top at e + e − colliders, Phys. Rev. D 36 (1987) 724 [INSPIRE].
M. Muhlleitner and E. Popenda, Light stop decay in the MSSM with minimal flavour violation, JHEP 04 (2011) 095 [arXiv:1102.5712] [INSPIRE].
C. Boehm, A. Djouadi and Y. Mambrini, Decays of the lightest top squark, Phys. Rev. D 61 (2000) 095006 [hep-ph/9907428] [INSPIRE].
S.P. Das, A. Datta and M. Guchait, Four-body decay of the stop squark at the upgraded Tevatron, Phys. Rev. D 65 (2002) 095006 [hep-ph/0112182] [INSPIRE].
ATLAS collaboration, Search for direct top squark pair production in events with a Z boson, b-jets and missing transverse momentum in \( \sqrt{s}=8 \) TeV pp collisions with the ATLAS detector, Eur. Phys. J. C 74 (2014) 2883 [arXiv:1403.5222] [INSPIRE].
CMS collaboration, Search for top-squark pairs decaying into Higgs or Z bosons in pp collisions at \( \sqrt{s}=8 \) TeV, Phys. Lett. B 736 (2014) 371 [arXiv:1405.3886] [INSPIRE].
D. Ghosh, Boosted dibosons from mixed heavy top squarks, Phys. Rev. D 88 (2013) 115013 [arXiv:1308.0320] [INSPIRE].
ATLAS collaboration, Search for direct third-generation squark pair production in final states with missing transverse momentum and two b-jets in \( \sqrt{s}=8 \) TeV pp collisions with the ATLAS detector, JHEP 10 (2013) 189 [arXiv:1308.2631] [INSPIRE].
CMS collaboration, Search for direct production of bottom squark pairs, CMS-PAS-SUS-14-011 (2014).
ATLAS collaboration, Search for pair-produced third-generation squarks decaying via charm quarks or in compressed supersymmetric scenarios in pp collisions at \( \sqrt{s}=8 \) TeV with the ATLAS detector, Phys. Rev. D 90 (2014) 052008 [arXiv:1407.0608] [INSPIRE].
CMS collaboration, Search for top squark decaying to a charm quark and a neutralino in events with a jet and missing transverse momentum, CMS-PAS-SUS-13-009 (2013).
ATLAS collaboration, Search for top squark pair production in final states with one isolated lepton, jets and missing transverse momentum in \( \sqrt{s}=8 \) TeV pp collisions with the ATLAS detector, JHEP 11 (2014) 118 [arXiv:1407.0583] [INSPIRE].
H. Li, W. Parker, Z. Si and S. Su, Sbottom signature of the supersymmetric golden region, Eur. Phys. J. C 71 (2011) 1584 [arXiv:1009.6042] [INSPIRE].
A. Datta and S. Niyogi, Entangled system of squarks from the third generation at the Large Hadron Collider, arXiv:1111.0200 [INSPIRE].
G. Bélanger, F. Boudjema, C. Hugonie, A. Pukhov and A. Semenov, Relic density of dark matter in the NMSSM, JCAP 09 (2005) 001 [hep-ph/0505142] [INSPIRE].
Muon g-2 collaboration, G.W. Bennett et al., Final report of the muon E821 anomalous magnetic moment measurement at BNL, Phys. Rev. D 73 (2006) 072003 [hep-ex/0602035] [INSPIRE].
T. Blum et al., The muon (g − 2) theory value: present and future, arXiv:1311.2198 [INSPIRE].
M. Endo, K. Hamaguchi, S. Iwamoto and T. Yoshinaga, Muon g − 2 vs LHC in supersymmetric models, JHEP 01 (2014) 123 [arXiv:1303.4256] [INSPIRE].
M. Badziak, Z. Lalak, M. Lewicki, M. Olechowski and S. Pokorski, Upper bounds on sparticle masses from muon g − 2 and the Higgs mass and the complementarity of future colliders, JHEP 03 (2015) 003 [arXiv:1411.1450] [INSPIRE].
Planck collaboration, P.A.R. Ade et al., Planck 2015 results. XIII. Cosmological parameters, arXiv:1502.01589 [INSPIRE].
LUX collaboration, D.S. Akerib et al., First results from the LUX dark matter experiment at the Sanford Underground Research Facility, Phys. Rev. Lett. 112 (2014) 091303 [arXiv:1310.8214] [INSPIRE].
T. Moroi and L. Randall, Wino cold dark matter from anomaly mediated SUSY breaking, Nucl. Phys. B 570 (2000) 455 [hep-ph/9906527] [INSPIRE].
B.S. Acharya, P. Kumar, K. Bobkov, G. Kane, J. Shao and S. Watson, Non-thermal dark matter and the moduli problem in string frameworks, JHEP 06 (2008) 064 [arXiv:0804.0863] [INSPIRE].
B.S. Acharya, G. Kane, S. Watson and P. Kumar, A non-thermal WIMP miracle, Phys. Rev. D 80 (2009) 083529 [arXiv:0908.2430] [INSPIRE].
E. Hardy, J. March-Russell and J. Unwin, Precision unification in λSUSY with a 125 GeV Higgs, JHEP 10 (2012) 072 [arXiv:1207.1435] [INSPIRE].
M. Farina, M. Perelstein and B. Shakya, Higgs couplings and naturalness in λ-SUSY, JHEP 04 (2014) 108 [arXiv:1310.0459] [INSPIRE].
M. Drees, H. Dreiner, D. Schmeier, J. Tattersall and J.S. Kim, CheckMATE: confronting your favourite new physics model with LHC data, Comput. Phys. Commun. 187 (2014) 227 [arXiv:1312.2591] [INSPIRE].
K. Krizka, A. Kumar and D.E. Morrissey, Very light scalar top quarks at the LHC, Phys. Rev. D 87 (2013) 095016 [arXiv:1212.4856] [INSPIRE].
A. Delgado, G.F. Giudice, G. Isidori, M. Pierini and A. Strumia, The light stop window, Eur. Phys. J. C 73 (2013) 2370 [arXiv:1212.6847] [INSPIRE].
G. Bélanger, D. Ghosh, R. Godbole, M. Guchait and D. Sengupta, Probing the flavor violating scalar top quark signal at the LHC, Phys. Rev. D 89 (2014) 015003 [arXiv:1308.6484] [INSPIRE].
R. Grober, M. Muhlleitner, E. Popenda and A. Wlotzka, Light stop decays: implications for LHC searches, arXiv:1408.4662 [INSPIRE].
G. Ferretti, R. Franceschini, C. Petersson and R. Torre, Spot the stop with a b-tag, Phys. Rev. Lett. 114 (2015) 201801 [arXiv:1502.01721] [INSPIRE].
B. Dutta et al., Probing compressed top squark scenarios at the LHC at 14 TeV, Phys. Rev. D 90 (2014) 095022 [arXiv:1312.1348] [INSPIRE].
W.S. Cho et al., Improving the sensitivity of stop searches with on-shell constrained invariant mass variables, JHEP 05 (2015) 040 [arXiv:1411.0664] [INSPIRE].
J. Eckel, S. Su and H. Zhang, Complex decay chains of top and bottom squarks, JHEP 07 (2015) 075 [arXiv:1411.1061] [INSPIRE].
L. Covi and F. Dradi, Long-Lived stop at the LHC with or without R-parity, JCAP 10 (2014) 039 [arXiv:1403.4923] [INSPIRE].
ATLAS collaboration, Searches for heavy long-lived charged particles with the ATLAS detector in proton-proton collisions at \( \sqrt{s}=8 \) TeV, JHEP 01 (2015) 068 [arXiv:1411.6795] [INSPIRE].
A. de la Puente and A. Szynkman, Long-lived Colored Scalars at the LHC, arXiv:1504.07293 [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].
A. Belyaev, N.D. Christensen and A. Pukhov, CalcHEP 3.4 for collider physics within and beyond the Standard Model, Comput. Phys. Commun. 184 (2013) 1729 [arXiv:1207.6082] [INSPIRE].
ATLAS collaboration, Calibration of the performance of b-tagging for c and light-flavour jets in the 2012 ATLAS data, ATLAS-CONF-2014-046 (2014).
ATLAS collaboration, Performance and calibration of the JetFitterCharm algorithm for c-jet identification, ATL-PHYS-PUB-2015-001 (2015).
J. Pumplin, D.R. Stump, J. Huston, H.L. Lai, P.M. Nadolsky and W.K. Tung, New generation of parton distributions with uncertainties from global QCD analysis, JHEP 07 (2002) 012 [hep-ph/0201195] [INSPIRE].
W. Beenakker, M. Krämer, T. Plehn, M. Spira and P.M. Zerwas, Stop production at hadron colliders, Nucl. Phys. B 515 (1998) 3 [hep-ph/9710451] [INSPIRE].
http://www.thphys.uni-heidelberg.de/~plehn/index.php?show=prospino&visible=tools
T. Sjöstrand, S. Mrenna and P.Z. Skands, PYTHIA 6.4 physics and manual, JHEP 05 (2006) 026 [hep-ph/0603175] [INSPIRE].
B.C. Allanach et al., SUSY Les Houches accord 2, Comput. Phys. Commun. 180 (2009) 8 [arXiv:0801.0045] [INSPIRE].
M.L. Mangano, M. Moretti, F. Piccinini and M. Treccani, Matching matrix elements and shower evolution for top-quark production in hadronic collisions, JHEP 01 (2007) 013 [hep-ph/0611129] [INSPIRE].
M.L. Mangano, The so-called MLM prescription for ME/PS matching, presented at the Fermilab ME/MC Tuning Workshop, October 4, Fermilab, U.S.A. (2002).
J. Alwall et al., Comparative study of various algorithms for the merging of parton showers and matrix elements in hadronic collisions, Eur. Phys. J. C 53 (2008) 473 [arXiv:0706.2569] [INSPIRE].
DELPHES 3 collaboration, J. de Favereau et al., DELPHES 3, a modular framework for fast simulation of a generic collider experiment, JHEP 02 (2014) 057 [arXiv:1307.6346] [INSPIRE].
M. Cacciari, G.P. Salam and G. Soyez, FastJet user manual, Eur. Phys. J. C 72 (2012) 1896 [arXiv:1111.6097] [INSPIRE].
ATLAS collaboration, Search for supersymmetry at \( \sqrt{s}=8 \) TeV in final states with jets and two same-sign leptons or three leptons with the ATLAS detector, JHEP 06 (2014) 035 [arXiv:1404.2500] [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].
CMS collaboration, CMS technical design report, volume II: physics performance, J. Phys. G 34 (2007) 995 [INSPIRE].
ATLAS collaboration, Measurement of W + W − production in pp collisions at \( \sqrt{s}=7 \) TeV with the ATLAS detector and limits on anomalous W W Z and W W γ couplings, Phys. Rev. D 87 (2013) 112001 [arXiv:1210.2979] [INSPIRE].
CMS collaboration, Measurement of the W + W − cross section in pp collisions at \( \sqrt{s}=7 \) TeV and limits on anomalous W W γ and W W Z couplings, Eur. Phys. J. C 73 (2013) 2610 [arXiv:1306.1126] [INSPIRE].
CMS collaboration, Measurement of W + W − and ZZ production cross sections in pp collisions at \( \sqrt{s}=8 \) TeV, Phys. Lett. B 721 (2013) 190 [arXiv:1301.4698] [INSPIRE].
ATLAS collaboration, Search for supersymmetry in events containing a same-flavouropposite-sign dilepton pair, jets and large missing transverse momentum in \( \sqrt{s}=8 \) TeV pp collisions with the ATLAS detector, Eur. Phys. J. C 75 (2015) 318 [arXiv:1503.03290] [INSPIRE].
Open Access
This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.
Author information
Authors and Affiliations
Corresponding author
Additional information
ArXiv ePrint: 1505.00604
Rights and permissions
Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0), which permits use, duplication, adaptation, distribution, and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
About this article
Cite this article
Beuria, J., Chatterjee, A., Datta, A. et al. Two light stops in the NMSSM and the LHC. J. High Energ. Phys. 2015, 73 (2015). https://doi.org/10.1007/JHEP09(2015)073
Received:
Accepted:
Published:
DOI: https://doi.org/10.1007/JHEP09(2015)073