Abstract
Many new physics models with strongly interacting sectors predict a mass hierarchy between the lightest vector meson and the lightest pseudoscalar mesons. We examine the power of jet substructure tools to extend the 7 TeV LHC sensitivity to these new states for the case of QCD octet mesons, considering both two gluon and two b-jet decay modes for the pseudoscalar mesons. We develop both a simple dijet search using only the jet mass and a more sophisticated jet substructure analysis, both of which can discover the composite octets in a dijet-like signature. The reach depends on the mass hierarchy between the vector and pseudoscalar mesons. We find that for the pseudoscalar-to-vector meson mass ratio below approximately 0.2 a simple dijet analysis with only the jet mass variable provides the best discovery limit; for a ratio between 0.2 and the QCD-like value of 0.3, the full jet substructure analysis has the best discovery potential; for a ratio above approximately 0.3, the standard four-jet analysis is more suitable.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
References
C. Kilic, T. Okui and R. Sundrum, Colored resonances at the Tevatron: phenomenology and discovery potential in multijets, JHEP 07 (2008) 038 [arXiv:0802.2568] [INSPIRE].
C. Kilic, T. Okui and R. Sundrum, Vectorlike confinement at the LHC, JHEP 02 (2010) 018 [arXiv:0906.0577] [INSPIRE].
Y. Bai and R.J. Hill, Weakly interacting stable pions, Phys. Rev. D 82 (2010) 111701 [arXiv:1005.0008] [INSPIRE].
J. Kang and M.A. Luty, Macroscopic strings and ‘quirks’ at colliders, JHEP 11 (2009) 065 [arXiv:0805.4642] [INSPIRE].
C. Kilic, S. Schumann and M. Son, Searching for multijet resonances at the LHC, JHEP 04 (2009) 128 [arXiv:0810.5542] [INSPIRE].
J.M. Butterworth, B.E. Cox and J.R. Forshaw, W W scattering at the CERN LHC, Phys. Rev. D 65 (2002) 096014 [hep-ph/0201098] [INSPIRE].
J.M. Butterworth, A.R. Davison, M. Rubin and G.P. Salam, Jet substructure as a new Higgs search channel at the LHC, Phys. Rev. Lett. 100 (2008) 242001 [arXiv:0802.2470] [INSPIRE].
J. Thaler and L.-T. Wang, Strategies to identify boosted tops, JHEP 07 (2008) 092 [arXiv:0806.0023] [INSPIRE].
D.E. Kaplan, K. Rehermann, M.D. Schwartz and B. Tweedie, Top tagging: a method for identifying boosted hadronically decaying top quarks, Phys. Rev. Lett. 101 (2008) 142001 [arXiv:0806.0848] [INSPIRE].
T. Plehn, G.P. Salam and M. Spannowsky, Fat jets for a light Higgs, Phys. Rev. Lett. 104 (2010) 111801 [arXiv:0910.5472] [INSPIRE].
C. Hackstein and M. Spannowsky, Boosting Higgs discovery: the forgotten channel, Phys. Rev. D 82 (2010) 113012 [arXiv:1008.2202] [INSPIRE].
Y. Cui, Z. Han and M.D. Schwartz, W-jet tagging: optimizing the identification of boosted hadronically-decaying W bosons, Phys. Rev. D 83 (2011) 074023 [arXiv:1012.2077] [INSPIRE].
J.L. Hewett, J. Shelton, M. Spannowsky, T.M.P. Tait and M. Takeuchi, \( A_{{^{{F\,B}}}}^t \) meets LHC, Phys. Rev. D 84 (2011) 054005 [arXiv:1103.4618] [INSPIRE].
W. Skiba and D. Tucker-Smith, Using jet mass to discover vector quarks at the LHC, Phys. Rev. D 75 (2007) 115010 [hep-ph/0701247] [INSPIRE].
B. Holdom, t ′ at the LHC: the physics of discovery, JHEP 03 (2007) 063 [hep-ph/0702037] [INSPIRE].
J.M. Butterworth, J.R. Ellis and A.R. Raklev, Reconstructing sparticle mass spectra using hadronic decays, JHEP 05 (2007) 033 [hep-ph/0702150] [INSPIRE].
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] [INSPIRE].
G.D. Kribs, A. Martin, T.S. Roy and M. Spannowsky, Discovering the Higgs boson in new physics events using jet substructure, Phys. Rev. D 81 (2010) 111501 [arXiv:0912.4731] [INSPIRE].
C.-R. Chen, M.M. Nojiri and W. Sreethawong, Search for the elusive Higgs boson using jet structure at LHC, JHEP 11 (2010) 012 [arXiv:1006.1151] [INSPIRE].
G.D. Kribs, A. Martin, T.S. Roy and M. Spannowsky, Discovering Higgs bosons of the MSSM using jet substructure, Phys. Rev. D 82 (2010) 095012 [arXiv:1006.1656] [INSPIRE].
A. Falkowski, D. Krohn, L.-T. Wang, J. Shelton and A. Thalapillil, Unburied Higgs boson: jet substructure techniques for searching for Higgs’ decay into gluons, Phys. Rev. D 84 (2011) 074022 [arXiv:1006.1650] [INSPIRE].
T. Plehn, M. Spannowsky, M. Takeuchi and D. Zerwas, Stop reconstruction with tagged tops, JHEP 10 (2010) 078 [arXiv:1006.2833] [INSPIRE].
B. Bhattacherjee, M. Guchait, S. Raychaudhuri and K. Sridhar, Boosted top quark signals for heavy vector boson excitations in a universal extra dimension model, Phys. Rev. D 82 (2010) 055006 [arXiv:1006.3213] [INSPIRE].
A. Katz, M. Son and B. Tweedie, Jet substructure and the search for neutral spin-one resonances in electroweak boson channels, JHEP 03 (2011) 011 [arXiv:1010.5253] [INSPIRE].
A. Katz, M. Son and B. Tweedie, Ditau-jet tagging and boosted Higgses from a multi-TeV resonance, Phys. Rev. D 83 (2011) 114033 [arXiv:1011.4523] [INSPIRE].
B. Bellazzini, C. Csáki, J. Hubisz and J. Shao, Discovering a Higgs boson decaying to four jets in supersymmetric cascade decays, Phys. Rev. D 83 (2011) 095018 [arXiv:1012.1316] [INSPIRE].
G.D. Kribs, A. Martin and T.S. Roy, Higgs boson discovery through top-partners decays using jet substructure, Phys. Rev. D 84 (2011) 095024 [arXiv:1012.2866] [INSPIRE].
P. Bandyopadhyay and B. Bhattacherjee, Boosted top quarks in supersymmetric cascade decays at the LHC, Phys. Rev. D 84 (2011) 035020 [arXiv:1012.5289] [INSPIRE].
J. Fan, D. Krohn, P. Mosteiro, A.M. Thalapillil and L.-T. Wang, Heavy squarks at the LHC, JHEP 03 (2011) 077 [arXiv:1102.0302] [INSPIRE].
D.E. Kaplan and M. McEvoy, Associated production of non-standard Higgs bosons at the LHC, Phys. Rev. D 83 (2011) 115004 [arXiv:1102.0704] [INSPIRE].
T. Plehn, M. Spannowsky and M. Takeuchi, Boosted semileptonic tops in stop decays, JHEP 05 (2011) 135 [arXiv:1102.0557] [INSPIRE].
C. Englert, T.S. Roy and M. Spannowsky, Ditau jets in Higgs searches, Phys. Rev. D 84 (2011) 075026 [arXiv:1106.4545] [INSPIRE].
C.T. Hill and E.H. Simmons, Strong dynamics and electroweak symmetry breaking, Phys. Rept. 381 (2003) 235 [Erratum ibid. 390 (2004) 553] [hep-ph/0203079] [INSPIRE].
B.A. Dobrescu, K. Kong and R. Mahbubani, Massive color-octet bosons and pairs of resonances at hadron colliders, Phys. Lett. B 670 (2008) 119 [arXiv:0709.2378] [INSPIRE].
Y. Bai and B.A. Dobrescu, Heavy octets and Tevatron signals with three or four b jets, JHEP 07 (2011) 100 [arXiv:1012.5814] [INSPIRE].
J.C. Pati and A. Salam, Are the new particles color gluons?, Phys. Rev. Lett. 34 (1975) 613 [INSPIRE].
L.J. Hall and A.E. Nelson, Heavy gluons and monojets, Phys. Lett. B 153 (1985) 430 [INSPIRE].
P.H. Frampton and S.L. Glashow, Chiral color: an alternative to the standard model, Phys. Lett. B 190 (1987) 157 [INSPIRE].
LHC New Physics Working Group collaboration, D. Alves et al., Simplified models for LHC new physics searches, arXiv:1105.2838 [INSPIRE].
C. Kilic and T. Okui, The LHC phenomenology of vectorlike confinement, JHEP 04 (2010) 128 [arXiv:1001.4526] [INSPIRE].
J. Sayre, D.A. Dicus, C. Kao and S. Nandi, Searching for colorons at the Large Hadron Collider, Phys. Rev. D 84 (2011) 015011 [arXiv:1105.3219] [INSPIRE].
B.W. Lee and H.T. Nieh, Phenomenological Lagrangian for field algebra, hard pions and radiative corrections, Phys. Rev. 166 (1968) 1507 [INSPIRE].
I.S. Gerstein, B.W. Lee, H.T. Nieh and H.J. Schnitzer, Pion electromagnetic mass difference for physical pions, Phys. Rev. Lett. 19 (1967) 1064 [INSPIRE].
H. Harari, Superconvergent dispersion relations and electromagnetic mass differences, Phys. Rev. Lett. 17 (1966) 1303 [INSPIRE].
P. Langacker and H. Pagels, Pion and kaon electromagnetic masses in chiral perturbation theory, Phys. Rev. D 8 (1973) 4620 [INSPIRE].
A.D. Martin, W.J. Stirling, R.S. Thorne and G. Watt, Parton distributions for the LHC, Eur. Phys. J. C 63 (2009) 189 [arXiv:0901.0002] [INSPIRE].
ATLAS collaboration, A search for \( t\overline t \) resonances in the lepton plus jets channel in 200 pb −1 of pp collisions at \( \sqrt {s} = 7\;TeV \), ATLAS-CONF-2011-087 (2011).
ATLAS collaboration, G. Aad et al., Measurement of inclusive jet and dijet cross sections in proton-proton collisions at 7 TeV centre-of-mass energy with the ATLAS detector, Eur. Phys. J. C 71 (2011) 1512 [arXiv:1009.5908] [INSPIRE].
CMS collaboration, Measurement of the inclusive jet cross section in pp collisions at 7 TeV, CMS-PAS-QCD-10-011 (2010).
ATLAS collaboration, G. Aad et al., Search for new physics in dijet mass and angular distributions in pp collisions at \( \sqrt {s} = 7\;TeV \) measured with the ATLAS detector, New J. Phys. 13 (2011) 053044 [arXiv:1103.3864] [INSPIRE].
ATLAS collaboration, Update of the search for new physics in the dijet mass distribution in 163 pb −1 of pp collisions at \( \sqrt {s} = 7\;TeV \) measured with the ATLAS detector, ATLAS-CONF-2011-081 (2011).
S.D. Ellis, C.K. Vermilion and J.R. Walsh, Techniques for improved heavy particle searches with jet substructure, Phys. Rev. D 80 (2009) 051501 [arXiv:0903.5081] [INSPIRE].
D. Krohn, J. Thaler and L.-T. Wang, Jet trimming, JHEP 02 (2010) 084 [arXiv:0912.1342] [INSPIRE].
J. Thaler and K. Van Tilburg, Identifying boosted objects with N-subjettiness, JHEP 03 (2011) 015 [arXiv:1011.2268] [INSPIRE].
J. Alwall et al., MadGraph/MadEvent v4: the new web generation, JHEP 09 (2007) 028 [arXiv:0706.2334] [INSPIRE].
J. Pumplin et al., New generation of parton distributions with uncertainties from global QCD analysis, JHEP 07 (2002) 012 [hep-ph/0201195] [INSPIRE].
T. Sjöstrand, S. Mrenna and P.Z. Skands, PYTHIA 6.4 physics and manual, JHEP 05 (2006) 026 [hep-ph/0603175] [INSPIRE].
M. Cacciari, G.P. Salam and G. Soyez, FastJet, http://fastjet.fr/.
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].
ATLAS collaboration, Prospects for top anti-top resonance searches using early ATLAS data, ATL-PHYS-PUB-2010-008 (2010).
ATLAS collaboration, G. Aad et al., Search for new particles in two-jet final states in 7 TeV proton-proton collisions with the ATLAS detector at the LHC, Phys. Rev. Lett. 105 (2010) 161801 [arXiv:1008.2461] [INSPIRE].
ATLAS collaboration, Measurement of jet mass and substructure for inclusive jets in \( \sqrt {s} = 7\;TeV \) pp collisions with the ATLAS experiment, ATLAS-CONF-2011-073(2011).
ATLAS collaboration, ATLAS sensitivity to the standard model Higgs in the HW and HZ channels at high transverse momenta, ATL-PHYS-PUB-2009-088 (2009).
T. Plehn and T.M.P. Tait, Seeking sgluons, J. Phys. G 36 (2009) 075001 [arXiv:0810.3919] [INSPIRE].
C. Englert, C. Hackstein and M. Spannowsky, Measuring spin and CP from semi-hadronic ZZ decays using jet substructure, Phys. Rev. D 82 (2010) 114024 [arXiv:1010.0676] [INSPIRE].
R.S. Chivukula, A. Grant and E.H. Simmons, Two gluon coupling and collider phenomenology of color octet technirho mesons, Phys. Lett. B 521 (2001) 239 [hep-ph/0109029] [INSPIRE].
A.R. Zerwekh, C.O. Dib and R. Rosenfeld, A new signature for color octet pseudoscalars at the CERN LHC, Phys. Rev. D 77 (2008) 097703 [arXiv:0802.4303] [INSPIRE].
R. Boughezal and F. Petriello, Color-octet scalar effects on Higgs boson production in gluon fusion, Phys. Rev. D 81 (2010) 114033 [arXiv:1003.2046] [INSPIRE].
R. Boughezal, Constraints on heavy colored scalars from Tevatron’s Higgs exclusion limit, Phys. Rev. D 83 (2011) 093003 [arXiv:1101.3769] [INSPIRE].
Y. Bai and A. Martin, Topological pions, Phys. Lett. B 693 (2010) 292 [arXiv:1003.3006] [INSPIRE].
A. Freitas and P. Schwaller, Multi-photon signals from composite models at LHC, JHEP 01 (2011) 022 [arXiv:1010.2528] [INSPIRE].
Author information
Authors and Affiliations
Corresponding author
Additional information
ArXiv ePrint: 1107.3563
Rights and permissions
Open Access This article is distributed under the terms of the Creative Commons Attribution 2.0 International License ( https://creativecommons.org/licenses/by/2.0 ), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
About this article
Cite this article
Bai, Y., Shelton, J. Composite octet searches with jet substructure. J. High Energ. Phys. 2012, 67 (2012). https://doi.org/10.1007/JHEP07(2012)067
Received:
Revised:
Accepted:
Published:
DOI: https://doi.org/10.1007/JHEP07(2012)067