Abstract
Hypothetical color-octet particles of spin 0, pair-produced at hadron colliders through their QCD coupling, may lead to final states involving three or four b jets. The scalar octets may also be resonantly produced in pairs via a spin-1 octet, as we show within a renormalizable coloron model. We analyze kinematic distributions of the 3b final state that differentiate between these two production mechanisms, as well as between scalar octets and supersymmetric Higgs bosons. A scalar octet of mass in the 140–150 GeV range can explain the nonstandard shape of the b-jet transverse energy distributions reported by the CDF Collaboration, especially when the coloron mass is slightly above twice the scalar mass. The dominant decay mode of the scalar octet in that case is into a pair of gluons, so that the production of a pair of dijet resonances is large in this model, of about 40 pb at the Tevatron. Even when a W boson is radiated from the initial state, the inclusive cross section for producing a dijet resonance near the scalar octet mass remains sizable, around 0.15 pb.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
References
For a review, see 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] [SPIRES].
G. Burdman, B.A. Dobrescu and E. Ponton, Resonances from two universal extra dimensions, Phys. Rev. D 74 (2006) 075008 [hep-ph/0601186] [SPIRES].
C. Kilic, T. Okui and R. Sundrum, Colored Resonances at the Tevatron: Phenomenology and Discovery Potential in Multijets, JHEP 07 (2008) 038 [ar**v:0802.2568] [SPIRES].
C. Kilic, T. Okui and R. Sundrum, Vectorlike Confinement at the LHC, JHEP 02 (2010) 018 [ar**v:0906.0577] [SPIRES].
Y. Bai and R.J. Hill, Weakly Interacting Stable Pions, Phys. Rev. D 82 (2010) 111701 [ar**v:1005.0008] [SPIRES].
T. Plehn and T.M.P. Tait, Seeking Sgluons, J. Phys. G 36 (2009) 075001 [ar**v:0810.3919] [SPIRES].
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 [ar**v:0709.2378] [SPIRES].
R.S. Chivukula, M. Golden and E.H. Simmons, Multi-jet physics at hadron colliders, Nucl. Phys. B 363 (1991) 83 [SPIRES].
C. Kilic, S. Schumann and M. Son, Searching for Multijet Resonances at the LHC, JHEP 04 (2009) 128 [ar**v:0810.5542] [SPIRES].
C.T. Hill, Topcolor: Top quark condensation in a gauge extension of the standard model, Phys. Lett. B 266 (1991) 419 [SPIRES].
C.T. Hill and S.J. Parke, Top production: Sensitivity to new physics, Phys. Rev. D 49 (1994) 4454 [hep-ph/9312324] [SPIRES].
R.S. Chivukula, A.G. Cohen and E.H. Simmons, New strong interactions at the Tevatron?, Phys. Lett. B 380 (1996) 92 [hep-ph/9603311] [SPIRES].
E.H. Simmons, Coloron phenomenology, Phys. Rev. D 55 (1997) 1678 [hep-ph/9608269] [SPIRES].
CDF collaboration, Search for Higgs bosons produced in association with b quarks, Note 10105, June 2010, http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/3b_susyhiggs_jun10.
http://www-cdf.fnal.gov/physics/new/hdg//Results_files/results/3b_susyhiggs_jun10/more_plots.html
A.V. Manohar and M.B. Wise, Flavor changing neutral currents, an extended scalar sector and the Higgs production rate at the LHC, Phys. Rev. D 74 (2006) 035009 [hep-ph/0606172] [SPIRES].
M. Gerbush, T.J. Khoo, D.J. Phalen, A. Pierce and D. Tucker-Smith, Color-octet scalars at the LHC, Phys. Rev. D 77 (2008) 095003 [ar**v:0710.3133] [SPIRES].
M.I. Gresham and M.B. Wise, Color Octet Scalar Production at the LHC, Phys. Rev. D 76 (2007) 075003 [ar**v:0706.0909] [SPIRES].
Y. Bai and A. Martin, Topological Pions, Phys. Lett. B 693 (2010) 292 [ar**v:1003.3006] [SPIRES].
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 [ar**v:0802.4303] [SPIRES].
T.G. Rizzo, Gluon final states in Higgs boson decay, Phys. Rev. D 22 (1980) 178 [Addendum ibid. D 22 (1980) 1824]. [SPIRES].
B.A. Dobrescu, P.J. Fox and A. Martin, CP violation in B s mixing from heavy Higgs exchange, Phys. Rev. Lett. 105 (2010) 041801 [ar**v:1005.4238] [SPIRES].
D0 collaboration, V.M. Abazov et al., Evidence for an anomalous like-sign dimuon charge asymmetry, Phys. Rev. D 82 (2010) 032001 [ar**v:1005.2757] [SPIRES].
D. Becirevic, V. Giménez, G. Martinelli, M. Papinutto and J. Reyes, B-parameters of the complete set of matrix elements of ∆B = 2 operators from the lattice, JHEP 04 (2002) 025 [hep-lat/0110091] [SPIRES].
HPQCD collaboration, E. Gamiz, C.T.H. Davies, G.P. Lepage, J. Shigemitsu and M. Wingate, Neutral B Meson Mixing in Unquenched Lattice QCD, Phys. Rev. D 80 (2009) 014503 [ar**v:0902.1815] [SPIRES].
A. Lenz and U. Nierste, Theoretical update of \( {B_s} - {\bar{B}_s} \) mixing, JHEP 06 (2007) 072 [hep-ph/0612167] [SPIRES].
CDF collaboration, A. Abulencia et al., Observation of B/s0 anti-B/s0 oscillations, Phys. Rev. Lett. 97 (2006) 242003 [hep-ex/0609040] [SPIRES].
LHCb collaboration, Measurement of ∆m s in the decay B 0 → D s −(K + K − π −)(3)π, note LHCb-CONF-2011-005, April 2011.
J. Alwall et al., MadGraph/MadEvent v4: TheNewWebGeneration, JHEP 09 (2007) 028 [ar**v:0706.2334] [SPIRES].
MadGraph v5.1.2.3, http://madgraph.phys.ucl.ac.be/.
J. Pumplin et al., New generation of parton distributions with uncertainties from global QCD analysis, JHEP 07 (2002) 012 [hep-ph/0201195] [SPIRES].
T. Sjöstrand, S. Mrenna and P.Z. Skands, PYTHIA 6.4 Physics and Manual, JHEP 05 (2006) 026 [hep-ph/0603175] [SPIRES].
CDF collaboration, F. Abe et al., Search for new particles decaying to b anti-b in \( p\bar{p} \) collisions at \( \sqrt {s} = 1.8 \) TeV, Phys. Rev. Lett. 82 (1999) 2038 [hep-ex/9809022] [SPIRES].
J.S. Conway, Pretty Good Simulation of high-energy collisions, 090401 release, http://physics.ucdavis.edu/∼conway/research/software/pgs/pgs4-general.htm.
D0 collaboration, V.M. Abazov et al., Search for neutral Higgs bosons in the multi-b-jet topology in 5.2fb-1 of ppbar collisions at sqrt(s) = 1.96 TeV, Phys. Lett. B 698 (2011) 97 [ar**v:1011.1931] [SPIRES].
K. Cheung and W.-Y. Keung, Split supersymmetry, stable gluino and gluinonium, Phys. Rev. D 71 (2005) 015015 [hep-ph/0408335] [SPIRES].
Y. Kats and M.D. Schwartz, Annihilation decays of bound states at the LHC, JHEP 04 (2010) 016 [ar**v:0912.0526] [SPIRES].
C. Kim and T. Mehen, Color Octet Scalar Bound States at the LHC, Phys. Rev. D 79 (2009) 035011 [ar**v:0812.0307] [SPIRES].
A.D. Martin, W.J. Stirling, R.S. Thorne and G. Watt, Parton distributions for the LHC, Eur. Phys. J. C 63 (2009) 189 [ar**v:0901.0002] [SPIRES].
A. Djouadi, The Anatomy of electro-weak symmetry breaking. II. The Higgs bosons in the minimal supersymmetric model, Phys. Rept. 459 (2008) 1 [hep-ph/0503173] [SPIRES].
M.S. Carena, S. Heinemeyer, C.E.M. Wagner and G. Weiglein, MSSM Higgs boson searches at the Tevatron and the LHC: Impact of different benchmark scenarios, Eur. Phys. J. C 45 (2006) 797 [hep-ph/0511023] [SPIRES].
W.A. Bardeen and C.T. Hill, Chiral dynamics and heavy quark symmetry in a solvable toy field theoretic model, Phys. Rev. D 49 (1994) 409 [hep-ph/9304265] [SPIRES].
W.A. Bardeen, E.J. Eichten and C.T. Hill, Chiral Multiplets of Heavy-Light Mesons, Phys. Rev. D 68 (2003) 054024 [hep-ph/0305049] [SPIRES].
B.A. Dobrescu, K. Kong and R. Mahbubani, Prospects for top-prime quark discovery at the Tevatron, JHEP 06 (2009) 001 [ar**v:0902.0792] [SPIRES].
CDF collaboration, T. Aaltonen et al., Search for new particles decaying into dijets in proton-antiproton collisions at \( \sqrt {s} = 1.96 \) TeV, Phys. Rev. D 79 (2009) 112002 [ar**v:0812.4036] [SPIRES].
E. Eichten and K.D. Lane, Low-scale technicolor at the Tevatron, Phys. Lett. B 388 (1996) 803 [hep-ph/9607213] [SPIRES].
E. Eichten and K. Lane, Low-scale technicolor at the Tevatron and LHC, Phys. Lett. B 669 (2008) 235 [ar**v:0706.2339] [SPIRES].
K. Lane and A. Martin, An Effective Lagrangian for Low-Scale Technicolor, Phys. Rev. D 80 (2009) 115001 [ar**v:0907.3737] [SPIRES].
Author information
Authors and Affiliations
Corresponding author
Additional information
Ar**v ePrint: 1012.5814
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
Bai, Y., Dobrescu, B.A. Heavy octets and Tevatron signals with three or four b jets. J. High Energ. Phys. 2011, 100 (2011). https://doi.org/10.1007/JHEP07(2011)100
Received:
Accepted:
Published:
DOI: https://doi.org/10.1007/JHEP07(2011)100