Abstract
Motivated by the null results of LHC searches, which together with the Higgs mass, severely constrain minimal supersymmetric extensions of the standard model, we adopt a model-independent approach to study charged slepton flavor. We examine a number of simplified models, with different subsets of sleptons, electroweak gauginos, and Higgsinos, and derive the allowed slepton flavor dependence in the region probed by current LHC searches, and in the region relevant for the 14 TeV LHC. We then study the impact of the allowed flavor dependence on lepton plus missing energy searches. In some cases, flavor dependence significantly modifies the reach of the searches. These effects may be even larger at the next LHC run, since for the higher masses probed at 14 TeV, larger flavor mixings and relative mass splittings are compatible with low-energy constraints. Retaining the full lepton flavor information can increase the sensitivity of the searches.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
References
ATLAS collaboration, Search for direct-slepton and direct-chargino production in final states with two opposite-sign leptons, missing transverse momentum and no jets in 20/fb of pp collisions at \( \sqrt{s}=8 \) TeV with the ATLAS detector, ATLAS-CONF-2013-049 (2013).
CMS collaboration, Search for electroweak production of charginos, neutralinos and sleptons using leptonic final states in pp collisions at 8 TeV, CMS-PAS-SUS-13-006 (2013).
ATLAS collaboration, Search for direct production of charginos and neutralinos in events with three leptons and missing transverse momentum in \( \sqrt{s}=8 \) TeV pp collisions with the ATLAS detector, JHEP 04 (2014) 169 [arXiv:1402.7029] [INSPIRE].
ATLAS collaboration, Search for direct production of charginos, neutralinos and sleptons in final states with two leptons and missing transverse momentum in pp collisions at \( \sqrt{s}=8 \) TeV with the ATLAS detector, JHEP 05 (2014) 071 [arXiv:1403.5294] [INSPIRE].
ATLAS collaboration, Search for supersymmetry in events with four or more leptons in \( \sqrt{s}=8 \) TeV pp collisions with the ATLAS detector, Phys. Rev. D 90 (2014) 052001 [arXiv:1405.5086] [INSPIRE].
CMS collaboration, Searches for electroweak production of charginos, neutralinos and sleptons decaying to leptons and W, Z and Higgs bosons in pp collisions at 8 TeV, Eur. Phys. J. C 74 (2014) 3036 [arXiv:1405.7570] [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].
F. Jegerlehner and A. Nyffeler, The Muon g-2, Phys. Rept. 477 (2009) 1 [arXiv:0902.3360] [INSPIRE].
K. Hagiwara, R. Liao, A.D. Martin, D. Nomura and T. Teubner, (g − 2) μ and α(M 2 Z ) re-evaluated using new precise data, J. Phys. G 38 (2011) 085003 [arXiv:1105.3149] [INSPIRE].
M. Davier, A. Hoecker, B. Malaescu and Z. Zhang, Reevaluation of the Hadronic Contributions to the Muon g-2 and to α(M 2 Z ), Eur. Phys. J. C 71 (2011) 1515 [Erratum ibid. C 72 (2012) 1874] [arXiv:1010.4180] [INSPIRE].
BESIII collaboration, A. Denig, Measurements of the Hadronic Cross section and of Meson Transition Form Factors at BESIII for an improved Standard Model Prediction of (g − 2) μ , Nucl. Part. Phys. Proc. 260 (2015) 79 [arXiv:1412.2951] [INSPIRE].
J.L. Feng, K.T. Matchev and Y. Shadmi, Theoretical expectations for the muon’s electric dipole moment, Nucl. Phys. B 613 (2001) 366 [hep-ph/0107182] [INSPIRE].
G.F. Giudice, P. Paradisi and M. Passera, Testing new physics with the electron g-2, JHEP 11 (2012) 113 [arXiv:1208.6583] [INSPIRE].
J.L. Feng, C.G. Lester, Y. Nir and Y. Shadmi, The Standard Model and Supersymmetric Flavor Puzzles at the Large Hadron Collider, Phys. Rev. D 77 (2008) 076002 [arXiv:0712.0674] [INSPIRE].
G.D. Kribs, E. Poppitz and N. Weiner, Flavor in supersymmetry with an extended R-symmetry, Phys. Rev. D 78 (2008) 055010 [arXiv:0712.2039] [INSPIRE].
Y. Nomura, M. Papucci and D. Stolarski, Flavorful Supersymmetry from Higher Dimensions, JHEP 07 (2008) 055 [arXiv:0802.2582] [INSPIRE].
Y. Nomura and D. Stolarski, Naturally Flavorful Supersymmetry at the LHC, Phys. Rev. D 78 (2008) 095011 [arXiv:0808.1380] [INSPIRE].
Y. Shadmi and P.Z. Szabo, Flavored Gauge-Mediation, JHEP 06 (2012) 124 [arXiv:1103.0292] [INSPIRE].
N. Craig, M. McCullough and J. Thaler, The New Flavor of Higgsed Gauge Mediation, JHEP 03 (2012) 049 [arXiv:1201.2179] [INSPIRE].
L. Calibbi, Z. Lalak, S. Pokorski and R. Ziegler, The Messenger Sector of SUSY Flavour Models and Radiative Breaking of Flavour Universality, JHEP 06 (2012) 018 [arXiv:1203.1489] [INSPIRE].
N. Craig, M. McCullough and J. Thaler, Flavor Mediation Delivers Natural SUSY, JHEP 06 (2012) 046 [arXiv:1203.1622] [INSPIRE].
L. Calibbi, P. Paradisi and R. Ziegler, Lepton Flavor Violation in Flavored Gauge Mediation, Eur. Phys. J. C 74 (2014) 3211 [arXiv:1408.0754] [INSPIRE].
Y. Nir and N. Seiberg, Should squarks be degenerate?, Phys. Lett. B 309 (1993) 337 [hep-ph/9304307] [INSPIRE].
M. Abdullah, I. Galon, Y. Shadmi and Y. Shirman, Flavored Gauge Mediation, A Heavy Higgs and Supersymmetric Alignment, JHEP 06 (2013) 057 [arXiv:1209.4904] [INSPIRE].
I. Galon, G. Perez and Y. Shadmi, Non-Degenerate Squarks from Flavored Gauge Mediation, JHEP 09 (2013) 117 [arXiv:1306.6631] [INSPIRE].
L. Calibbi, A. Mariotti, C. Petersson and D. Redigolo, Selectron NLSP in Gauge Mediation, JHEP 09 (2014) 133 [arXiv:1405.4859] [INSPIRE].
J. Hisano, M. Nagai and P. Paradisi, Electric dipole moments from flavor-changing supersymmetric soft terms, Phys. Rev. D 78 (2008) 075019 [arXiv:0712.1285] [INSPIRE].
J. Hisano, M. Nagai and P. Paradisi, Flavor effects on the electric dipole moments in supersymmetric theories: A beyond leading order analysis, Phys. Rev. D 80 (2009) 095014 [arXiv:0812.4283] [INSPIRE].
G. Raz, The mass insertion approximation without squark degeneracy, Phys. Rev. D 66 (2002) 037701 [hep-ph/0205310] [INSPIRE].
Y. Nir and G. Raz, Quark squark alignment revisited, Phys. Rev. D 66 (2002) 035007 [hep-ph/0206064] [INSPIRE].
MEG collaboration, J. Adam et al., New constraint on the existence of the μ + → e +γ decay, Phys. Rev. Lett. 110 (2013) 201801 [arXiv:1303.0754] [INSPIRE].
A.M. Baldini et al., MEG Upgrade Proposal, arXiv:1301.7225 [INSPIRE].
SINDRUM collaboration, U. Bellgardt et al., Search for the Decay μ + → e + e + e −, Nucl. Phys. B 299 (1988) 1 [INSPIRE].
A. Blondel et al., Research Proposal for an Experiment to Search for the Decay μ → eee, arXiv:1301.6113 [INSPIRE].
SINDRUM II collaboration, W.H. Bertl et al., A search for muon to electron conversion in muonic gold, Eur. Phys. J. C 47 (2006) 337 [INSPIRE].
SINDRUM II collaboration, C. Dohmen et al., Test of lepton flavor conservation in μ → e conversion on titanium, Phys. Lett. B 317 (1993) 631 [INSPIRE].
COMET collaboration, http://comet.kek.jp/Documents.html.
Mu2e collaboration, R.J. Abrams et al., Mu2e Conceptual Design Report, arXiv:1211.7019 [INSPIRE].
BaBar collaboration, B. Aubert et al., Searches for Lepton Flavor Violation in the Decays τ ± → e ±γ and τ ± → μ ±γ, Phys. Rev. Lett. 104 (2010) 021802 [arXiv:0908.2381] [INSPIRE].
Belle, Belle-II collaboration, K. Hayasaka, Results and prospects on lepton flavor violation at Belle/Belle II, J. Phys. Conf. Ser. 408 (2013) 012069 [INSPIRE].
K. Hayasaka et al., Search for Lepton Flavor Violating τ Decays into Three Leptons with 719 Million Produced τ + τ − Pairs, Phys. Lett. B 687 (2010) 139 [arXiv:1001.3221] [INSPIRE].
ACME collaboration, J. Baron et al., Order of Magnitude Smaller Limit on the Electric Dipole Moment of the Electron, Science 343 (2014) 269 [arXiv:1310.7534] [INSPIRE].
F. Borzumati and A. Masiero, Large Muon and electron Number Violations in Supergravity Theories, Phys. Rev. Lett. 57 (1986) 961 [INSPIRE].
J. Hisano, T. Moroi, K. Tobe and M. Yamaguchi, Lepton flavor violation via right-handed neutrino Yukawa couplings in supersymmetric standard model, Phys. Rev. D 53 (1996) 2442 [hep-ph/9510309] [INSPIRE].
F. Gabbiani, E. Gabrielli, A. Masiero and L. Silvestrini, A complete analysis of FCNC and CP constraints in general SUSY extensions of the standard model, Nucl. Phys. B 477 (1996) 321 [hep-ph/9604387] [INSPIRE].
F. Gabbiani and A. Masiero, FCNC in Generalized Supersymmetric Theories, Nucl. Phys. B 322 (1989) 235 [INSPIRE].
I. Masina and C.A. Savoy, Sleptonarium: Constraints on the CP and flavor pattern of scalar lepton masses, Nucl. Phys. B 661 (2003) 365 [hep-ph/0211283] [INSPIRE].
P. Paradisi, Constraints on SUSY lepton flavor violation by rare processes, JHEP 10 (2005) 006 [hep-ph/0505046] [INSPIRE].
E. Arganda and M.J. Herrero, Testing supersymmetry with lepton flavor violating tau and mu decays, Phys. Rev. D 73 (2006) 055003 [hep-ph/0510405] [INSPIRE].
M. Arana-Catania, S. Heinemeyer and M.J. Herrero, New Constraints on General Slepton Flavor Mixing, Phys. Rev. D 88 (2013) 015026 [arXiv:1304.2783] [INSPIRE].
ATLAS collaboration, Search for direct production of charginos, neutralinos and sleptons in final states with two leptons and missing transverse momentum in pp collisions at \( \sqrt{s} \) = 8 TeV with the ATLAS detector, JHEP 05 (2014) 071 [arXiv:1403.5294] [INSPIRE].
CMS collaboration, Searches for long-lived charged particles in pp collisions at \( \sqrt{s} \) = 7 and 8 TeV, JHEP 07 (2013) 122 [arXiv:1305.0491] [INSPIRE].
J.L. Feng, S.T. French, C.G. Lester, Y. Nir and Y. Shadmi, The Shifted Peak: Resolving Nearly Degenerate Particles at the LHC, Phys. Rev. D 80 (2009) 114004 [arXiv:0906.4215] [INSPIRE].
J.L. Feng et al., Measuring Slepton Masses and Mixings at the LHC, JHEP 01 (2010) 047 [arXiv:0910.1618] [INSPIRE].
J. Eckel, M.J. Ramsey-Musolf, W. Shepherd and S. Su, Impact of LSP Character on Slepton Reach at the LHC, JHEP 11 (2014) 117 [arXiv:1408.2841] [INSPIRE].
ATLAS collaboration, Search for charginos nearly mass degenerate with the lightest neutralino based on a disappearing-track signature in pp collisions at \( \sqrt{s} \) = 8 TeV with the ATLAS detector, Phys. Rev. D 88 (2013) 112006 [arXiv:1310.3675] [INSPIRE].
ATLAS collaboration, Search for the direct production of charginos, neutralinos and staus in final states with at least two hadronically decaying taus and missing transverse momentum in pp collisions at \( \sqrt{s} \) = 8 TeV with the ATLAS detector, JHEP 10 (2014) 96 [arXiv:1407.0350] [INSPIRE].
R. Rattazzi and U. Sarid, Large tan Beta in gauge mediated SUSY breaking models, Nucl. Phys. B 501 (1997) 297 [hep-ph/9612464] [INSPIRE].
J. Hisano and S. Sugiyama, Charge-breaking constraints on left-right mixing of stau’s, Phys. Lett. B 696 (2011) 92 [Erratum ibid. B 719 (2013) 472] [arXiv:1011.0260] [INSPIRE].
R. Sato, K. Tobioka and N. Yokozaki, Enhanced Diphoton Signal of the Higgs Boson and the Muon g-2 in Gauge Mediation Models, Phys. Lett. B 716 (2012) 441 [arXiv:1208.2630] [INSPIRE].
T. Kitahara, Vacuum Stability Constraints on the Enhancement of the h → γγ rate in the MSSM, JHEP 11 (2012) 021 [arXiv:1208.4792] [INSPIRE].
L. Calibbi, J.M. Lindert, T. Ota and Y. Takanishi, Cornering light Neutralino Dark Matter at the LHC, JHEP 10 (2013) 132 [arXiv:1307.4119] [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].
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 and G.P. Salam, Dispelling the N 3 myth for the k t jet-finder, Phys. Lett. B 641 (2006) 57 [hep-ph/0512210] [INSPIRE].
M. Cacciari, G.P. Salam and G. Soyez, The Anti-k(t) jet clustering algorithm, JHEP 04 (2008) 063 [arXiv:0802.1189] [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].
C.G. Lester and D.J. Summers, Measuring masses of semiinvisibly decaying particles pair produced at hadron colliders, Phys. Lett. B 463 (1999) 99 [hep-ph/9906349] [INSPIRE].
A. Barr, C. Lester and P. Stephens, m(T2): The truth behind the glamour, J. Phys. G 29 (2003) 2343 [hep-ph/0304226] [INSPIRE].
Mt2 / Stransverse Mass / Oxbridge Kinetics Library, http://www.hep.phy.cam.ac.uk/ lester/mt2/.
H.-C. Cheng and Z. Han, Minimal Kinematic Constraints and m(T2), JHEP 12 (2008) 063 [arXiv:0810.5178] [INSPIRE].
N. Arkani-Hamed, H.-C. Cheng, J.L. Feng and L.J. Hall, Probing lepton flavor violation at future colliders, Phys. Rev. Lett. 77 (1996) 1937 [hep-ph/9603431] [INSPIRE].
N. Arkani-Hamed, J.L. Feng, L.J. Hall and H.-C. Cheng, CP violation from slepton oscillations at the LHC and NLC, Nucl. Phys. B 505 (1997) 3 [hep-ph/9704205] [INSPIRE].
ATLAS collaboration, Search for direct production of charginos and neutralinos in events with three leptons and missing transverse momentum in 21 fb−1 of pp collisions at \( \sqrt{s}=8 \) TeV with the ATLAS detector, ATLAS-CONF-2013-035 (2013).
I. Galon and Y. Shadmi, Kinematic Edges with Flavor Splitting and Mixing, Phys. Rev. D 85 (2012) 015010 [arXiv:1108.2220] [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: 1502.07753
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
Calibbi, L., Galon, I., Masiero, A. et al. Charged slepton flavor post the 8 TeV LHC: a simplified model analysis of low-energy constraints and LHC SUSY searches. J. High Energ. Phys. 2015, 43 (2015). https://doi.org/10.1007/JHEP10(2015)043
Received:
Accepted:
Published:
DOI: https://doi.org/10.1007/JHEP10(2015)043