Abstract
We study signatures of R-parity violation in the production ofsupersymmetric particles at the LHC, and the subsequent decay of the lightest neutralino being the end product of a supersymmetric cascade decay. In doing so, we pay particular attention to the possible flavour structure of the operators, and how one may discriminate between different possibilities. A neutralino LSP would couple to all quarks and leptons and a comparative study of its decays provides an optimal channel for the simultaneous study of all 45 R-violating operators. By studying the expected signals from all these operators, we demonstrate the ability to understand whether more than one coupling dominates, and to map the experimental signatures to operator hierarchies that can then be compared against theoretical models of flavour. Detailed comparisons with backgrounds, including those from MSSM cascade decays are made, using the PYTHIA event simulator.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
References
P. Fayet, Spontaneously broken supersymmetric theories of weak, electromagnetic and strong interactions, Phys. Lett. B 69 (1977) 489 [SPIRES].
G.R. Farrar and P. Fayet, Phenomenology of the production, decay and detection of new hadronic states associated with supersymmetry, Phys. Lett. B 76 (1978) 575 [SPIRES].
L.E. Ibáñez and G.G. Ross, Discrete gauge symmetry anomalies, Phys. Lett. B 260 (1991) 291 [SPIRES].
L.E. Ibáñez and G.G. Ross, Discrete gauge symmetries and the origin of baryon and lepton number conservation in supersymmetric versions of the standard model, Nucl. Phys. B 368 (1992) 3 [SPIRES].
S. Lola and G.G. Ross, Baryon and lepton number (non)conservation in supersymmetric theories, Phys. Lett. B 314 (1993) 336 [SPIRES].
A.Y. Smirnov and F. Vissani, Upper bound on all products of R-parity violating couplings λ′ and λ″ from proton decay, Phys. Lett. B 380 (1996) 317 [hep-ph/9601387] [SPIRES].
J.L. Goity and M. Sher, Bounds on ∆B = 1 couplings in the supersymmetric standard model, Phys. Lett. B 346 (1995) 69 [Erratum ibid. B 385 (1996) 500] [hep-ph/9412208] [SPIRES].
B. Brahmachari and P. Roy, Constraints on baryon nonconserving Yukawa couplings in a supersymmetric theory, Phys. Rev. D 50 (1994) R39 [Erratum ibid. D 51 (1995) 3974] [hep-ph/9403350] [SPIRES].
D. Chakraverty and D. Choudhury, b → sγ confronts B violating scalar couplings: R-parity violating supersymmetry or diquark, Phys. Rev. D 63 (2001) 075009 [hep-ph/0008165] [SPIRES].
D. Chakraverty and D. Choudhury, B physics constraints on baryon number violating couplings: grand unification or R-parity violation, Phys. Rev. D 63 (2001) 112002 [hep-ph/0012309] [SPIRES].
G. Bhattacharyya and D. Choudhury, D and τ decays: placing new bounds on R-parity violating supersymmetric coupling, Mod. Phys. Lett. A 10 (1995) 1699 [hep-ph/9503263] [SPIRES].
G. Bhattacharyya, J.R. Ellis and K. Sridhar, New LEP constraints on some supersymmetric Yukawa interactions that violate R-parity, Mod. Phys. Lett. A 10 (1995) 1583 [hep-ph/9503264] [SPIRES].
G. Bhattacharyya, D. Choudhury and K. Sridhar, New LEP bounds on B violating scalar couplings: R-parity violating supersymmetry or diquarks, Phys. Lett. B 355 (1995) 193 [hep-ph/9504314] [SPIRES].
M. Hirsch, H.V. Klapdor-Kleingrothaus and S.G. Kovalenko, New constraints on R-parity broken supersymmetry from neutrinoless double beta decay, Phys. Rev. Lett. 75 (1995) 17 [SPIRES].
G. Bhattacharyya, A brief review of R-parity-violating couplings, hep-ph/9709395 [SPIRES].
G. Bhattacharyya, R-parity-violating supersymmetric Yukawa couplings: a mini-review, Nucl. Phys. Proc. Suppl. 52A (1997) 83 [hep-ph/9608415] [SPIRES].
H.K. Dreiner, An introduction to explicit R-parity violation, hep-ph/9707435 [SPIRES].
B.C. Allanach, A. Dedes and H.K. Dreiner, Bounds on R-parity violating couplings at the weak scale and at the GUT scale, Phys. Rev. D 60 (1999) 075014 [hep-ph/9906209] [SPIRES].
For an introduction to the phenomenology of the MSSM see H.P. Nilles, Supersymmetry, supergravity and particle physics, Phys. Rept. 110 (1984) 1 [SPIRES].
H.E. Haber and G.L. Kane, The search for supersymmetry: probing physics beyond the standard model, Phys. Rept. 117 (1985) 75 [SPIRES].
For some of the earliest references on the phenomenology of R-violating supersymmetry see F. Zwirner, Observable ∆B = 2 transitions without nucleon decay in a minimal supersymmetric extension of the standard model, Phys. Lett. B 132 (1983) 103 [SPIRES].
J.R. Ellis, G. Gelmini, C. Jarlskog, G.G. Ross and J.W.F. Valle, Phenomenology of supersymmetry with broken R-parity, Phys. Lett. B 150 (1985) 142 [SPIRES].
G.G. Ross and J.W.F. Valle, Supersymmetric models without R-parity, Phys. Lett. B 151 (1985) 375 [SPIRES].
S. Dimopoulos and L.J. Hall, Lepton and baryon number violating collider signatures from supersymmetry, Phys. Lett. B 207 (1988) 210 [SPIRES].
L.J. Hall and M. Suzuki, Explicit R-parity breaking in supersymmetric models, Nucl. Phys. B 231 (1984) 419 [SPIRES].
S. Dawson, R-parity breaking in supersymmetric theories, Nucl. Phys. B 261 (1985) 297 [SPIRES].
R. Barbier et al., R-parity violating supersymmetry, Phys. Rept. 420 (2005) 1 [hep-ph/0406039] [SPIRES].
D. Choudhury and S. Raychaudhuri, R-parity violation at HERA?, Phys. Lett. B 401 (1997) 54 [hep-ph/9702392] [SPIRES].
G. Altarelli, J.R. Ellis, G.F. Giudice, S. Lola and M.L. Mangano, Pursuing interpretations of the HERA large Q 2 data, Nucl. Phys. B 506 (1997) 3 [hep-ph/9703276] [SPIRES].
E.L. Berger, B.W. Harris and Z. Sullivan, Single-top-squark production via R-parity-violating supersymmetric couplings in hadron collisions, Phys. Rev. Lett. 83 (1999) 4472 [hep-ph/9903549] [SPIRES].
E.L. Berger, B.W. Harris and Z. Sullivan, Direct probes of R-parity violating supersymmetric couplings via single top squark production, Phys. Rev. D 63 (2001) 115001 [hep-ph/0012184] [SPIRES].
W. Buchmüller, L. Covi, K. Hamaguchi, A. Ibarra and T. Yanagida, Gravitino dark matter in R-parity breaking vacua, JHEP 03 (2007) 037 [hep-ph/0702184] [SPIRES].
S. Lola, P. Osland and A.R. Raklev, Radiative gravitino decays from R-parity violation, Phys. Lett. B 656 (2007) 83 [arXiv:0707.2510] [SPIRES].
N.E. Bomark, S. Lola, P. Osland and A.R. Raklev, Gravitino dark matter and the flavour structure of R-violating operators, Phys. Lett. B 677 (2009) 62 [arXiv:0811.2969] [SPIRES].
F. Takayama and M. Yamaguchi, Gravitino dark matter without R-parity, Phys. Lett. B 485 (2000) 388 [hep-ph/0005214] [SPIRES].
G. Moreau and M. Chemtob, R-parity violation and the cosmological gravitino problem, Phys. Rev. D 65 (2002) 024033 [hep-ph/0107286] [SPIRES].
V. Ben-Hamo and Y. Nir, Implications of horizontal symmetries on baryon number violation in supersymmetric models, Phys. Lett. B 339 (1994) 77 [hep-ph/9408315] [SPIRES].
A.H. Chamseddine and H.K. Dreiner, Anomaly free gauged R symmetry in local supersymmetry, Nucl. Phys. B 458 (1996) 65 [hep-ph/9504337] [SPIRES].
P. Binetruy, S. Lavignac and P. Ramond, Yukawa textures with an anomalous horizontal Abelian symmetry, Nucl. Phys. B 477 (1996) 353 [hep-ph/9601243] [SPIRES].
G. Bhattacharyya, Non-Abelian flavour symmetry and R-parity, Phys. Rev. D 57 (1998) 3944 [hep-ph/9707297] [SPIRES].
P. Binetruy, E. Dudas, S. Lavignac and C.A. Savoy, Quark flavour conserving violations of the lepton number, Phys. Lett. B 422 (1998) 171 [hep-ph/9711517] [SPIRES].
J.R. Ellis, S. Lola and G.G. Ross, Hierarchies of R-violating interactions from family symmetries, Nucl. Phys. B 526 (1998) 115 [hep-ph/9803308] [SPIRES].
B.C. Allanach et al., The Snowmass points and slopes: benchmarks for SUSY searches, in Proceedings of the APS/DPF/DPB Summer Study on the Future of Particle Physics (Snowmass 2001), N. Graf ed., Snowmass U.S.A. (2001), pg. P125 [Eur. Phys. J. C 25] (2002) 113 [hep-ph/0202233] [SPIRES].
WMAP collaboration, C.L. Bennett et al., First year Wilkinson Microwave Anisotropy Probe (WMAP) observations: preliminary maps and basic results, Astrophys. J. Suppl. 148 (2003) 1 [astro-ph/0302207] [SPIRES].
WMAP collaboration, D.N. Spergel et al., First year Wilkinson Microwave Anisotropy Probe (WMAP) observations: determination of cosmological parameters, Astrophys. J. Suppl. 148 (2003) 175 [astro-ph/0302209] [SPIRES].
WMAP collaboration, D.N. Spergel et al., Wilkinson Microwave Anisotropy Probe (WMAP) three year results: implications for cosmology, Astrophys. J. Suppl. 170 (2007) 377 [astro-ph/0603449] [SPIRES].
H.K. Dreiner and G.G. Ross, R-parity violation at hadron colliders, Nucl. Phys. B 365 (1991) 597 [SPIRES].
F. de Campos et al., Probing bilinear R-parity violating supergravity at the LHC, JHEP 05 (2008) 048 [arXiv:0712.2156] [SPIRES].
F. de Campos et al., Probing neutrino mass with displaced vertices at the Tevatron, Phys. Rev. D 71 (2005) 075001 [hep-ph/0501153] [SPIRES].
D. Choudhury and P. Roy, New constraints on lepton nonconserving R-parity violating couplings, Phys. Lett. B 378 (1996) 153 [hep-ph/9603363] [SPIRES].
H.K. Dreiner, M. Krämer and B. O’Leary, Bounds on R-parity violation from leptonic and semi-leptonic meson decays, Phys. Rev. D 75 (2007) 114016 [hep-ph/0612278] [SPIRES].
Y. Kao and T. Takeuchi, Constraints on R-parity violation from recent Belle/Babar data, arXiv:0909.0042 [SPIRES].
R. Bose, Rare τ decays in R-parity violating supersymmetry, J. Phys. G 38 (2011) 065003 [arXiv:1012.1736] [SPIRES].
T. Sjöstrand, S. Mrenna and P.Z. Skands, A brief introduction to PYTHIA 8.1, Comput. Phys. Commun. 178 (2008) 852 [arXiv:0710.3820] [SPIRES].
B.C. Allanach et al., SUSY Les Houches accord 2, Comp. Phys. Commun. 180 (2009) 8 [arXiv:0801.0045] [SPIRES].
B.C. Allanach, SOFTSUSY: a C++ program for calculating supersymmetric spectra, Comput. Phys. Commun. 143 (2002) 305 [hep-ph/0104145] [SPIRES].
T. Sjöstrand, S. Mrenna and P.Z. Skands, PYTHIA 6.4 physics and manual, JHEP 05 (2006) 026 [hep-ph/0603175] [SPIRES].
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] [SPIRES].
S.D. Ellis and D.E. Soper, Successive combination jet algorithm for hadron collisions, Phys. Rev. D 48 (1993) 3160 [hep-ph/9305266] [SPIRES].
S. Catani, Y.L. Dokshitzer, M.H. Seymour and B.R. Webber, Longitudinally invariant k t clustering algorithms for hadron hadron collisions, Nucl. Phys. B 406 (1993) 187 [SPIRES].
Particle Data Group collaboration, K. Nakamura et al., Review of particle physics, J. Phys. G 37 (2010) 075021 [SPIRES].
ATLAS collaboration, ATLAS detector and physics performance technical design report, volume 1, CERN-LHCC-99-014, CERN, Geneva Switzerland (1999) [ATLAS-TDR-14] [SPIRES].
ATLAS collaboration, ATLAS detector and physics performance technical design report, volume 2, CERN-LHCC-99-015, CERN, Geneva Switzerland (1999) [ATLAS-TDR-15] [SPIRES].
H. Baer, C.-H. Chen and X. Tata, Impact of hadronic decays of the lightest neutralino on the reach of the CERN LHC, Phys. Rev. D 55 (1997) 1466 [hep-ph/9608221] [SPIRES].
D. Choudhury, M. Datta and M. Maity, Looking for the top-squark at the Tevatron with four jets, Phys. Rev. D 73 (2006) 055013 [hep-ph/0508009] [SPIRES].
J.M. Butterworth, J.R. Ellis, A.R. Raklev and G.P. Salam, Discovering baryon-number violating neutralino decays at the LHC, Phys. Rev. Lett. 103 (2009) 241803 [arXiv:0906.0728] [SPIRES].
S. Kraml and A.R. Raklev, Same-sign top quarks as signature of light stops at the LHC, Phys. Rev. D 73 (2006) 075002 [hep-ph/0512284] [SPIRES].
See e.g. P. Binetruy, Supersymmetric extensions of the standard model, plenary talk at the International Europhysics Conference on High-Energy Physics, Jerusalem Israel August 19–26 1997 [SPIRES].
S. Lola and G.G. Ross, Neutrino masses from U(1) symmetries and the super-Kamiokande data, Nucl. Phys. B 553 (1999) 81 [hep-ph/9902283] [SPIRES].
CMS collaboration, The CMS physics technical design report, volume 1, CERN-LHCC-2006-001, CERN, Geneva Switzerland (2006) [CMS-TDR-008-1] [SPIRES].
CMS collaboration, The CMS physics technical design report, volume 2, CERN-LHCC-2006-021, CERN, Geneva Switzerland (2006) [CMS-TDR-008-2] [J. Phys. G 34 (2007) 995] [SPIRES].
H. Baer, C.-H. Chen, F. Paige and X. Tata, Signals for minimal supergravity at the CERN Large Hadron Collider II: multilepton channels, Phys. Rev. D 53 (1996) 6241 [hep-ph/9512383] [SPIRES].
I. Hinchliffe, F.E. Paige, M.D. Shapiro, J. Soderqvist and W. Yao, Precision SUSY measurements at CERN LHC, Phys. Rev. D 55 (1997) 5520 [hep-ph/9610544] [SPIRES].
I. Hinchliffe et al., Precision SUSY measurements at LHC: point 3, LBNL-40954, Lawrence Berkeley National Lab, Berkeley U.S.A. (1998) [SPIRES]. .
H. Bachacou, I. Hinchliffe and F.E. Paige, Measurements of masses in SUGRA models at CERN LHC, Phys. Rev. D 62 (2000) 015009 [hep-ph/9907518] [SPIRES].
B.C. Allanach, C.G. Lester, M.A. Parker and B.R. Webber, Measuring sparticle masses in non-universal string inspired models at the LHC, JHEP 09 (2000) 004 [hep-ph/0007009] [SPIRES].
B.K. Gjelsten, D.J. Miller, 2 and P. Osland, Measurement of SUSY masses via cascade decays for SPS 1a, JHEP 12 (2004) 003 [hep-ph/0410303] [SPIRES].
D. Aristizabal Sierra, M. Hirsch and W. Porod, R-parity violating sneutrino decays, JHEP 09 (2005) 033 [hep-ph/0409241] [SPIRES].
B. Mukhopadhyaya, S. Roy and F. Vissani, Correlation between neutrino oscillations and collider signals of supersymmetry in an R-parity violating model, Phys. Lett. B 443 (1998) 191 [hep-ph/9808265] [SPIRES].
W. Porod, M. Hirsch, J. Romao and J.W.F. Valle, Testing neutrino mixing at future collider experiments, Phys. Rev. D 63 (2001) 115004 [hep-ph/0011248] [SPIRES].
Author information
Authors and Affiliations
Corresponding author
Additional information
ArXiv ePrint: 1105.4022
Rights and permissions
Open Access This is an open access article distributed under the terms of the Creative Commons Attribution Noncommercial License (https://creativecommons.org/licenses/by-nc/2.0), which permits any noncommercial use, distribution, and reproduction in any medium, provided the original author(s) and source are credited.
About this article
Cite this article
Bomark, NE., Choudhury, D., Lola, S. et al. Flavour structure of R-violating neutralino decays at the LHC. J. High Energ. Phys. 2011, 70 (2011). https://doi.org/10.1007/JHEP07(2011)070
Received:
Revised:
Accepted:
Published:
DOI: https://doi.org/10.1007/JHEP07(2011)070