Abstract
A compressed spectrum is an anticipated hideout for many beyond standard model scenarios. Such a spectrum naturally arises in the minimal universal extra dimension framework and also in supersymmetric scenarios. Low p T leptons and jets are characteristic features of such situations. Hence, a monojet with has been the conventional signal at the Large Hadron Collider (LHC). However, we stress that inclusion of p T -binned track observables from such soft objects provide very efficient discrimination of new physics signals against various SM backgrounds. We consider two benchmark points each for minimal universal extra dimension (MUED) and minimal supersymmetric standard model (MSSM) scenarios. We perform a detailed cut-based and multivariate analysis (MVA) to show that the new physics parameter space can be probed in the ongoing run of LHC at 13 TeV center-of-mass energy with an integrated luminosity ∼ 20-50 fb−1. When studied in conjunction with the dark matter relic density constraint assuming standard cosmology, we find that compressed MUED (with ΛR = 2) can be already excluded from the existing data. Also, MVA turns out to be a better technique than regular cut-based analysis since tracks provide uncorrelated observables which would extract more information from an event.
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References
S.P. Martin, Compressed supersymmetry and natural neutralino dark matter from top squark-mediated annihilation to top quarks, Phys. Rev. D 75 (2007) 115005 [hep-ph/0703097] [INSPIRE].
J. Fan, M. Reece and J.T. Ruderman, Stealth Supersymmetry, JHEP 11 (2011) 012 [arXiv:1105.5135] [INSPIRE].
H. Murayama, Y. Nomura, S. Shirai and K. Tobioka, Compact Supersymmetry, Phys. Rev. D 86 (2012) 115014 [arXiv:1206.4993] [INSPIRE].
H. Murayama, M.M. Nojiri and K. Tobioka, Improved discovery of a nearly degenerate model: MUED using MT2 at the LHC, Phys. Rev. D 84 (2011) 094015 [arXiv:1107.3369] [INSPIRE].
D. Choudhury and K. Ghosh, Bounds on Universal Extra Dimension from LHC Run I and II data, Phys. Lett. B 763 (2016) 155 [arXiv:1606.04084] [INSPIRE].
ATLAS collaboration, Search for squarks and gluinos in final states with jets and missing transverse momentum at \( \sqrt{s}=13 \) TeV with the ATLAS detector, Eur. Phys. J. C 76 (2016) 392 [arXiv:1605.03814] [INSPIRE].
CMS collaboration, Search for supersymmetry in the multijet and missing transverse momentum final state in pp collisions at 13 TeV, Phys. Lett. B 758 (2016) 152 [arXiv:1602.06581] [INSPIRE].
ATLAS collaboration, Search for new phenomena in final states with an energetic jet and large missing transverse momentum in pp collisions at \( \sqrt{s}=8 \) TeV with the ATLAS detector, Eur. Phys. J. C 75 (2015) 299 [arXiv:1502.01518] [INSPIRE].
J. Dutta, P. Konar, S. Mondal, B. Mukhopadhyaya and S.K. Rai, A Revisit to a Compressed Supersymmetric Spectrum with 125 GeV Higgs, JHEP 01 (2016) 051 [arXiv:1511.09284] [INSPIRE].
H. Baer, A. Box, E.-K. Park and X. Tata, Implications of compressed supersymmetry for collider and dark matter searches, JHEP 08 (2007) 060 [arXiv:0707.0618] [INSPIRE].
S.P. Martin, Exploring compressed supersymmetry with same-sign top quarks at the Large Hadron Collider, Phys. Rev. D 78 (2008) 055019 [arXiv:0807.2820] [INSPIRE].
T.J. LeCompte and S.P. Martin, Large Hadron Collider reach for supersymmetric models with compressed mass spectra, Phys. Rev. D 84 (2011) 015004 [arXiv:1105.4304] [INSPIRE].
T.J. LeCompte and S.P. Martin, Compressed supersymmetry after 1/fb at the Large Hadron Collider, Phys. Rev. D 85 (2012) 035023 [arXiv:1111.6897] [INSPIRE].
K. Harigaya, K. Kaneta and S. Matsumoto, Gaugino coannihilations, Phys. Rev. D 89 (2014) 115021 [arXiv:1403.0715] [INSPIRE].
J. Ellis, F. Luo and K.A. Olive, Gluino Coannihilation Revisited, JHEP 09 (2015) 127 [arXiv:1503.07142] [INSPIRE].
Z. Han, G.D. Kribs, A. Martin and A. Menon, Hunting quasidegenerate Higgsinos, Phys. Rev. D 89 (2014) 075007 [arXiv:1401.1235] [INSPIRE].
N. Nagata, H. Otono and S. Shirai, Probing bino-gluino coannihilation at the LHC, Phys. Lett. B 748 (2015) 24 [arXiv:1504.00504] [INSPIRE].
J. Bramante, N. Desai, P. Fox, A. Martin, B. Ostdiek and T. Plehn, Towards the Final Word on Neutralino Dark Matter, Phys. Rev. D 93 (2016) 063525 [arXiv:1510.03460] [INSPIRE].
C. Han, L. Wu, J.M. Yang, M. Zhang and Y. Zhang, New approach for detecting a compressed bino/wino at the LHC, Phys. Rev. D 91 (2015) 055030 [arXiv:1409.4533] [INSPIRE].
H. Baer, A. Mustafayev and X. Tata, Monojet plus soft dilepton signal from light higgsino pair production at LHC14, Phys. Rev. D 90 (2014) 115007 [arXiv:1409.7058] [INSPIRE].
J. Dutta, P. Konar, S. Mondal, B. Mukhopadhyaya and S.K. Rai, Search for a compressed supersymmetric spectrum with a light Gravitino, arXiv:1704.04617 [INSPIRE].
A. Aboubrahim, P. Nath and A.B. Spisak, Stau coannihilation, compressed spectrum and SUSY discovery potential at the LHC, Phys. Rev. D 95 (2017) 115030 [arXiv:1704.04669] [INSPIRE].
B. Bhattacherjee, A. Choudhury, K. Ghosh and S. Poddar, Compressed supersymmetry at 14 TeV LHC, Phys. Rev. D 89 (2014) 037702 [arXiv:1308.1526] [INSPIRE].
C. Han, A. Kobakhidze, N. Liu, A. Saavedra, L. Wu and J.M. Yang, Probing Light Higgsinos in Natural SUSY from Monojet Signals at the LHC, JHEP 02 (2014) 049 [arXiv:1310.4274] [INSPIRE].
P. Schwaller and J. Zurita, Compressed electroweakino spectra at the LHC, JHEP 03 (2014) 060 [arXiv:1312.7350] [INSPIRE].
D. Barducci, A. Belyaev, A.K.M. Bharucha, W. Porod and V. Sanz, Uncovering Natural Supersymmetry via the interplay between the LHC and Direct Dark Matter Detection, JHEP 07 (2015) 066 [arXiv:1504.02472] [INSPIRE].
C. Han and M. Park, Revealing the jet substructure in a compressed spectrum, Phys. Rev. D 94 (2016) 011502 [arXiv:1507.07729] [INSPIRE].
S. Mukhopadhyay, M.M. Nojiri and T.T. Yanagida, Compressed SUSY search at the 13 TeV LHC using kinematic correlations and structure of ISR jets, JHEP 10 (2014) 12 [arXiv:1403.6028] [INSPIRE].
A. Chakraborty, S. Chakraborty and T.S. Roy, Chasing New Physics in Stacks of Soft Tracks, Phys. Rev. D 94 (2016) 111703 [arXiv:1606.07826] [INSPIRE].
T. Appelquist, H.-C. Cheng and B.A. Dobrescu, Bounds on universal extra dimensions, Phys. Rev. D 64 (2001) 035002 [hep-ph/0012100] [INSPIRE].
H.-C. Cheng, K.T. Matchev and M. Schmaltz, Radiative corrections to Kaluza-Klein masses, Phys. Rev. D 66 (2002) 036005 [hep-ph/0204342] [INSPIRE].
F. del Aguila, M. Pérez-Victoria and J. Santiago, Bulk fields with general brane kinetic terms, JHEP 02 (2003) 051 [hep-th/0302023] [INSPIRE].
T. Flacke, A. Menon and D.J. Phalen, Non-minimal universal extra dimensions, Phys. Rev. D 79 (2009) 056009 [arXiv:0811.1598] [INSPIRE].
A. Datta, U.K. Dey, A. Shaw and A. Raychaudhuri, Universal Extra-Dimensional Models with Boundary Localized Kinetic Terms: Probing at the LHC, Phys. Rev. D 87 (2013) 076002 [arXiv:1205.4334] [INSPIRE].
A. Datta, K. Nishiwaki and S. Niyogi, Non-minimal Universal Extra Dimensions: The Strongly Interacting Sector at the Large Hadron Collider, JHEP 11 (2012) 154 [arXiv:1206.3987] [INSPIRE].
T. Flacke, K. Kong and S.C. Park, Phenomenology of Universal Extra Dimensions with Bulk-Masses and Brane-Localized Terms, JHEP 05 (2013) 111 [arXiv:1303.0872] [INSPIRE].
T. Flacke, K. Kong and S.C. Park, A Review on Non-Minimal Universal Extra Dimensions, Mod. Phys. Lett. A 30 (2015) 1530003 [arXiv:1408.4024] [INSPIRE].
H.-C. Cheng, J.L. Feng and K.T. Matchev, Kaluza-Klein dark matter, Phys. Rev. Lett. 89 (2002) 211301 [hep-ph/0207125] [INSPIRE].
G. Servant and T.M.P. Tait, Is the lightest Kaluza-Klein particle a viable dark matter candidate?, Nucl. Phys. B 650 (2003) 391 [hep-ph/0206071] [INSPIRE].
D. Hooper and S. Profumo, Dark matter and collider phenomenology of universal extra dimensions, Phys. Rept. 453 (2007) 29 [hep-ph/0701197] [INSPIRE].
Planck collaboration, P.A.R. Ade et al., Planck 2015 results. XIII. Cosmological parameters, Astron. Astrophys. 594 (2016) A13 [arXiv:1502.01589] [INSPIRE].
S. Raychaudhuri and K. Sridhar, Particle Physics of Brane Worlds and Extra Dimensions, Cambridge University Press (2016) [ISBN: 9780521768566].
G. Bhattacharyya, A. Datta, S.K. Majee and A. Raychaudhuri, Exploring the Universal Extra Dimension at the LHC, Nucl. Phys. B 821 (2009) 48 [arXiv:0904.0937] [INSPIRE].
B. Bhattacherjee and K. Ghosh, Search for the minimal universal extra dimension model at the LHC with \( \sqrt{s}=7 \) TeV, Phys. Rev. D 83 (2011) 034003 [arXiv:1006.3043] [INSPIRE].
A. Datta, A. Datta and S. Poddar, Enriching the exploration of the mUED model with event shape variables at the CERN LHC, Phys. Lett. B 712 (2012) 219 [arXiv:1111.2912] [INSPIRE].
A. Belyaev, M. Brown, J. Moreno and C. Papineau, Discovering Minimal Universal Extra Dimensions (MUED) at the LHC, JHEP 06 (2013) 080 [arXiv:1212.4858] [INSPIRE].
G. Bélanger, A. Belyaev, M. Brown, M. Kakizaki and A. Pukhov, Testing Minimal Universal Extra Dimensions Using Higgs Boson Searches at the LHC, Phys. Rev. D 87 (2013) 016008 [arXiv:1207.0798] [INSPIRE].
T. Kakuda, K. Nishiwaki, K.-y. Oda and R. Watanabe, Universal extra dimensions after Higgs discovery, Phys. Rev. D 88 (2013) 035007 [arXiv:1305.1686] [INSPIRE].
U.K. Dey and A. Raychaudhuri, KK-number non-conserving decays: Signal of n = 2 excitations of extra-dimensional models at the LHC, Nucl. Phys. B 893 (2015) 408 [arXiv:1410.1463] [INSPIRE].
A. Datta and S. Raychaudhuri, Vacuum Stability Constraints and LHC Searches for a Model with a Universal Extra Dimension, Phys. Rev. D 87 (2013) 035018 [arXiv:1207.0476] [INSPIRE].
N. Deutschmann, T. Flacke and J.S. Kim, Current LHC Constraints on Minimal Universal Extra Dimensions, Phys. Lett. B 771 (2017) 515 [arXiv:1702.00410] [INSPIRE].
CMS collaboration, Search for dark matter, extra dimensions and unparticles in monojet events in proton-proton collisions at \( \sqrt{s}=8 \) TeV, Eur. Phys. J. C 75 (2015) 235 [arXiv:1408.3583] [INSPIRE].
ATLAS collaboration, Search for new phenomena in final states with an energetic jet and large missing transverse momentum in pp collisions at \( \sqrt{s}=13 \) TeV using the ATLAS detector, Phys. Rev. D 94 (2016) 032005 [arXiv:1604.07773] [INSPIRE].
J. Scherk and J.H. Schwarz, Spontaneous Breaking of Supersymmetry Through Dimensional Reduction, Phys. Lett. B 82 (1979) 60 [INSPIRE].
J. Scherk and J.H. Schwarz, How to Get Masses from Extra Dimensions, Nucl. Phys. B 153 (1979) 61 [INSPIRE].
U. Ellwanger, C. Hugonie and A.M. Teixeira, The Next-to-Minimal Supersymmetric Standard Model, Phys. Rept. 496 (2010) 1 [arXiv:0910.1785] [INSPIRE].
P. Batra, A. Delgado, D.E. Kaplan and T.M.P. Tait, The Higgs mass bound in gauge extensions of the minimal supersymmetric standard model, JHEP 02 (2004) 043 [hep-ph/0309149] [INSPIRE].
S.P. Martin, A supersymmetry primer, hep-ph/9709356 [INSPIRE].
N. Arkani-Hamed, A. Delgado and G.F. Giudice, The well-tempered neutralino, Nucl. Phys. B 741 (2006) 108 [hep-ph/0601041] [INSPIRE].
M.T. Arun, D. Choudhury and D. Sachdeva, Universal Extra Dimensions and the Graviton Portal to Dark Matter, arXiv:1703.04985 [INSPIRE].
L. Roszkowski, S. Trojanowski and K. Turzynski, Neutralino and gravitino dark matter with low reheating temperature, JHEP 11 (2014) 146 [arXiv:1406.0012] [INSPIRE].
XENON collaboration, E. Aprile et al., Physics reach of the XENON1T dark matter experiment, JCAP 04 (2016) 027 [arXiv:1512.07501] [INSPIRE].
A. Datta, K. Kong and K.T. Matchev, Discrimination of supersymmetry and universal extra dimensions at hadron colliders, Phys. Rev. D 72 (2005) 096006 [Erratum ibid. D 72 (2005) 119901] [hep-ph/0509246] [INSPIRE].
M. Battaglia, A. Datta, A. De Roeck, K. Kong and K.T. Matchev, Contrasting supersymmetry and universal extra dimensions at the clic multi-TeV e + e − collider, JHEP 07 (2005) 033 [hep-ph/0502041] [INSPIRE].
A. Alloul, N.D. Christensen, C. Degrande, C. Duhr and B. Fuks, FeynRules 2.0 — A complete toolbox for tree-level phenomenology, Comput. Phys. Commun. 185 (2014) 2250 [arXiv:1310.1921] [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].
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. Pukhov, CalcHEP 2.3: MSSM, structure functions, event generation, batchs and generation of matrix elements for other packages, hep-ph/0412191 [INSPIRE].
A. Datta, K. Kong and K.T. Matchev, Minimal Universal Extra Dimensions in CalcHEP/CompHEP, New J. Phys. 12 (2010) 075017 [arXiv:1002.4624] [INSPIRE].
J. Beuria, A. Datta, D. Debnath and K.T. Matchev, LHC Collider Phenomenology of Minimal Universal Extra Dimensions, arXiv:1702.00413 [INSPIRE].
R.D. Ball et al., Parton distributions with LHC data, Nucl. Phys. B 867 (2013) 244 [arXiv:1207.1303] [INSPIRE].
T. Sjöstrand et al., An introduction to PYTHIA 8.2, Comput. Phys. Commun. 191 (2015) 159 [arXiv:1410.3012] [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].
M. Cacciari, G.P. Salam and G. Soyez, The anti-k t jet clustering algorithm, JHEP 04 (2008) 063 [arXiv:0802.1189] [INSPIRE].
G. Bélanger, F. Boudjema and A. Pukhov, MicrOMEGAs: a code for the calculation of Dark Matter properties in generic models of particle interaction, arXiv:1402.0787 [INSPIRE].
J. Gallicchio and M.D. Schwartz, Quark and Gluon Jet Substructure, JHEP 04 (2013) 090 [arXiv:1211.7038] [INSPIRE].
T. Gleisberg et al., Event generation with SHERPA 1.1, JHEP 02 (2009) 007 [arXiv:0811.4622] [INSPIRE].
G. Corcella et al., HERWIG 6: An event generator for hadron emission reactions with interfering gluons (including supersymmetric processes), JHEP 01 (2001) 010 [hep-ph/0011363] [INSPIRE].
A. Hocker et al., TMVA — Toolkit for Multivariate Data Analysis, PoS (ACAT) 040 [physics/0703039] [INSPIRE].
I. Antcheva et al., ROOT: A C++ framework for petabyte data storage, statistical analysis and visualization, Comput. Phys. Commun. 180 (2009) 2499 [arXiv:1508.07749] [INSPIRE].
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Chakraborty, S., Niyogi, S. & Sridhar, K. Constraining compressed versions of MUED and MSSM using soft tracks at the LHC. J. High Energ. Phys. 2017, 105 (2017). https://doi.org/10.1007/JHEP07(2017)105
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DOI: https://doi.org/10.1007/JHEP07(2017)105