Abstract
Monojet searches using Effective Field Theory (EFT) operators are usually interpreted as a robust and model independent constraint on direct detection (DD) scattering cross-sections. At the same time, a mediator particle must be present to produce the dark matter (DM) at the LHC. This mediator particle may be produced on shell, so that direct searches for the mediating particle can constrain the effective operator being applied to monojet constraints. In this first paper, we do a case study on t-channel models in monojet searches, where the (Standard Model singlet) DM is pair produced via a t-channel mediating particle, whose supersymmetric analogue is the squark. We compare monojet constraints to direct constraints on single or pair production of the mediator from multi-jets plus missing energy searches and we identify the regions where the latter dominate over the former. We show that computing bounds using supersymmetric simplified models and in the narrow width approximation, as done in previous work in the literature, misses important quantitative effects. We perform a full event simulation and statistical analysis, and we compute the effects of both on- and off-shell production of the mediating particle, showing that for both the monojet and multi-jets plus missing energy searches, previously derived bounds provided more conservative bounds than what can be extracted by including all relevant processes in the simulation. Monojets and searches for super-symmetry (SUSY) provide comparable bounds on a wide range of the parameter space, with SUSY searches usually providing stronger bounds, except in the regions where the DM particle and the mediator are very mass degenerate. The EFT approximation rarely is able to reproduce the actual limits. In a second paper to follow, we consider the case of s-channel mediators.
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References
O. Nachtmann, A. Reiter and M. Wirbel, Single Jet and Single Photon Production in Proton - Anti-proton Collisions and e + e − Annihilation in a Supersymmetric Model, Z. Phys. C 27 (1985) 577 [INSPIRE].
D.A. Dicus, S. Nandi and J. Woodside, Collider Signals of a Superlight Gravitino, Phys. Rev. D 41 (1990) 2347 [INSPIRE].
A. Brignole, F. Feruglio, M.L. Mangano and F. Zwirner, Signals of a superlight gravitino at hadron colliders when the other superparticles are heavy, Nucl. Phys. B 526 (1998) 136 [Erratum ibid. B 582 (2000) 759-761] [hep-ph/9801329] [INSPIRE].
F.J. Petriello, S. Quackenbush and K.M. Zurek, The Invisible Z ′ at the CERN LHC, Phys. Rev. D 77 (2008) 115020 [arXiv:0803.4005] [INSPIRE].
L.M. Carpenter, A. Nelson, C. Shimmin, T.M.P. Tait and D. Whiteson, Collider searches for dark matter in events with a Z boson and missing energy, Phys. Rev. D 87 (2013) 074005 [arXiv:1212.3352] [INSPIRE].
A. Birkedal, K. Matchev and M. Perelstein, Dark matter at colliders: A Model independent approach, Phys. Rev. D 70 (2004) 077701 [hep-ph/0403004] [INSPIRE].
Y. Gershtein, F. Petriello, S. Quackenbush and K.M. Zurek, Discovering hidden sectors with mono-photon Z ′ o searches, Phys. Rev. D 78 (2008) 095002 [arXiv:0809.2849] [INSPIRE].
A. Nelson, L.M. Carpenter, R. Cotta, A. Johnstone and D. Whiteson, Confronting the Fermi Line with LHC data: an Effective Theory of Dark Matter Interaction with Photons, Phys. Rev. D 89 (2014) 056011 [arXiv:1307.5064] [INSPIRE].
J. Goodman et al., Constraints on Light Majorana dark Matter from Colliders, Phys. Lett. B 695 (2011) 185 [arXiv:1005.1286] [INSPIRE].
J. Goodman et al., Constraints on Dark Matter from Colliders, Phys. Rev. D 82 (2010) 116010 [arXiv:1008.1783] [INSPIRE].
Y. Bai, P.J. Fox and R. Harnik, The Tevatron at the Frontier of Dark Matter Direct Detection, JHEP 12 (2010) 048 [arXiv:1005.3797] [INSPIRE].
P.J. Fox, R. Harnik, J. Kopp and Y. Tsai, LEP Shines Light on Dark Matter, Phys. Rev. D 84 (2011) 014028 [arXiv:1103.0240] [INSPIRE].
P.J. Fox, R. Harnik, J. Kopp and Y. Tsai, Missing Energy Signatures of Dark Matter at the LHC, Phys. Rev. D 85 (2012) 056011 [arXiv:1109.4398] [INSPIRE].
P.J. Fox, R. Harnik, R. Primulando and C.-T. Yu, Taking a Razor to Dark Matter Parameter Space at the LHC, Phys. Rev. D 86 (2012) 015010 [arXiv:1203.1662] [INSPIRE].
H. An, X. Ji and L.-T. Wang, Light Dark Matter and Z ′ Dark Force at Colliders, JHEP 07 (2012) 182 [arXiv:1202.2894] [INSPIRE].
T. Lin, E.W. Kolb and L.-T. Wang, Probing dark matter couplings to top and bottom quarks at the LHC, Phys. Rev. D 88 (2013) 063510 [arXiv:1303.6638] [INSPIRE].
H. Davoudiasl, T. Han and H.E. Logan, Discovering an invisibly decaying Higgs at hadron colliders, Phys. Rev. D 71 (2005) 115007 [hep-ph/0412269] [INSPIRE].
L. Carpenter et al., Mono-Higgs: a new collider probe of dark matter, Phys. Rev. D 89 (2014) 075017 [arXiv:1312.2592] [INSPIRE].
A.A. Petrov and W. Shepherd, Searching for dark matter at LHC with Mono-Higgs production, Phys. Lett. B 730 (2014) 178 [arXiv:1311.1511] [INSPIRE].
H. Dreiner, D. Schmeier and J. Tattersall, Contact Interactions Probe Effective Dark Matter Models at the LHC, Europhys. Lett. 102 (2013) 51001 [arXiv:1303.3348] [INSPIRE].
G. Busoni, A. De Simone, E. Morgante and A. Riotto, On the Validity of the Effective Field Theory for Dark Matter Searches at the LHC, Phys. Lett. B 728 (2014) 412 [arXiv:1307.2253] [INSPIRE].
G. Busoni, A. De Simone, J. Gramling, E. Morgante and A. Riotto, On the Validity of the Effective Field Theory for Dark Matter Searches at the LHC, Part II: Complete Analysis for the s-channel, JCAP 06 (2014) 060 [arXiv:1402.1275] [INSPIRE].
O. Buchmueller, M.J. Dolan and C. McCabe, Beyond Effective Field Theory for Dark Matter Searches at the LHC, JHEP 01 (2014) 025 [arXiv:1308.6799] [INSPIRE].
S. Chang, R. Edezhath, J. Hutchinson and M. Luty, Effective WIMPs, Phys. Rev. D 89 (2014) 015011 [arXiv:1307.8120] [INSPIRE].
H. An, L.-T. Wang and H. Zhang, Dark matter with t-channel mediator: a simple step beyond contact interaction, Phys. Rev. D 89 (2014) 115014 [arXiv:1308.0592] [INSPIRE].
Y. Bai and J. Berger, Fermion Portal Dark Matter, JHEP 11 (2013) 171 [arXiv:1308.0612] [INSPIRE].
A. DiFranzo, K.I. Nagao, A. Rajaraman and T.M.P. Tait, Simplified Models for Dark Matter Interacting with Quarks, JHEP 11 (2013) 014 [arXiv:1308.2679] [INSPIRE].
I.M. Shoemaker and L. Vecchi, Unitarity and Monojet Bounds on Models for DAMA, CoGeNT and CRESST-II, Phys. Rev. D 86 (2012) 015023 [arXiv:1112.5457] [INSPIRE].
J. Alwall, M.-P. Le, M. Lisanti and J.G. Wacker, Model-Independent Jets plus Missing Energy Searches, Phys. Rev. D 79 (2009) 015005 [arXiv:0809.3264] [INSPIRE].
ATLAS collaboration, Search for squarks and gluinos with the ATLAS detector in final states with jets and missing transverse momentum and 20.3 fb −1 of \( \sqrt{s}=8 \) TeV proton-proton collision data, (2013).
ATLAS collaboration, Search for squarks and gluinos with the ATLAS detector using final states with jets and missing transverse momentum and 5.8 fb −1 of \( \sqrt{s}=8 \) TeV proton-proton collision data, (2012).
ATLAS collaboration, Search for squarks and gluinos using final states with jets and missing transverse momentum with the ATLAS detector in \( \sqrt{s}=7 \) TeV proton-proton collisions, (2012).
ATLAS collaboration, Search for pair-produced top squarks decaying into a charm quark and the lightest neutralinos with 20.3 fb −1 of pp collisions at \( \sqrt{s}=8 \) TeV with the ATLAS detector at the LHC, (2013).
CMS collaboration, Search for New Physics in the Multijets and Missing Momentum Final State in Proton-Proton Collisions at 8 TeV, (2013).
CMS collaboration, Search for supersymmetry in final states with missing transverse energy and 0, 1, 2, 3, or at least 4 b-quark jets in 8 TeV pp collisions using the variable AlphaT, (2012).
CMS collaboration, Search for supersymmetery in final states with missing transverse momentum and 0, 1, 2, or ≥3 b jets with CMS, (2012).
CMS collaboration, Search for new physics in the multijet and missing transverse momentum final state in proton-proton collisions at \( \sqrt{s}=7 \) TeV, Phys. Rev. Lett. 109 (2012) 171803 [arXiv:1207.1898] [INSPIRE].
R. Mahbubani, M. Papucci, G. Perez, J.T. Ruderman and A. Weiler, Light Nondegenerate Squarks at the LHC, Phys. Rev. Lett. 110 (2013) 151804 [arXiv:1212.3328] [INSPIRE].
J. Alwall, M. Herquet, F. Maltoni, O. Mattelaer and T. Stelzer, MadGraph 5 : Going Beyond, JHEP 06 (2011) 128 [arXiv:1106.0522] [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].
T. Sjöstrand, S. Mrenna and P.Z. Skands, PYTHIA 6.4 Physics and Manual, JHEP 05 (2006) 026 [hep-ph/0603175] [INSPIRE].
I.-W. Kim, M. Papucci, K. Sakurai and A. Weiler, Atom: Automated tests of models, in preparation.
A. Buckley et al., Rivet user manual, Comput. Phys. Commun. 184 (2013) 2803 [arXiv:1003.0694] [INSPIRE].
M. Cacciari, G.P. Salam and G. Soyez, FastJet User Manual, Eur. Phys. J. C 72 (2012) 1896 [arXiv:1111.6097] [INSPIRE].
CMS collaboration, Search for new physics in monojet events in pp collisions at \( \sqrt{s}=8 \) TeV, (2013).
CMS collaboration, Search for dark matter and large extra dimensions in monojet events in pp collisions at \( \sqrt{s}=7 \) TeV, JHEP 09 (2012) 094 [arXiv:1206.5663] [INSPIRE].
ATLAS collaboration, Search for New Phenomena in Monojet plus Missing Transverse Momentum Final States using 10fb −1 of pp Collisions at \( \sqrt{s}=8 \) TeV with the ATLAS detector at the LHC, (2012).
ATLAS collaboration, Search for dark matter candidates and large extra dimensions in events with a jet and missing transverse momentum with the ATLAS detector, JHEP 04 (2013) 075 [arXiv:1210.4491] [INSPIRE].
W. Beenakker, R. Hopker, M. Spira and P.M. Zerwas, Squark and gluino production at hadron colliders, Nucl. Phys. B 492 (1997) 51 [hep-ph/9610490] [INSPIRE].
J. Alwall, S. de Visscher and F. Maltoni, QCD radiation in the production of heavy colored particles at the LHC, JHEP 02 (2009) 017 [arXiv:0810.5350] [INSPIRE].
P. de Aquino, F. Maltoni, K. Mawatari and B. Oexl, Light Gravitino Production in Association with Gluinos at the LHC, JHEP 10 (2012) 008 [arXiv:1206.7098] [INSPIRE].
G. Cowan, K. Cranmer, E. Gross and O. Vitells, Asymptotic formulae for likelihood-based tests of new physics, Eur. Phys. J. C 71 (2011) 1554 [arXiv:1007.1727] [INSPIRE].
B. Mistlberger and F. Dulat, Limit setting procedures and theoretical uncertainties in Higgs boson searches, arXiv:1204.3851 [INSPIRE].
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Papucci, M., Vichi, A. & Zurek, K.M. Monojet versus the rest of the world I: t-channel models. J. High Energ. Phys. 2014, 24 (2014). https://doi.org/10.1007/JHEP11(2014)024
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DOI: https://doi.org/10.1007/JHEP11(2014)024