Abstract
A pair of new colored particles produced near the threshold can form a bound state and then annihilate into standard model particles. In this paper we show how the bound state signals can distinguish between two scenarios that have similar particle content and interactions but different spins, such as the minimal supersymmetric standard model (MSSM) and universal extra dimensions (UED). We find, for example, that bound states of KK gluons (KK gluonia) have an order of magnitude larger cross sections than gluinonia and they may be detectable as resonances in the \( b\bar{b} \), \( t\bar{t} \) or γγ channels if the KK gluon is very light and sufficiently long-lived. KK gluonia can be distinguished from gluinonia by their much larger cross sections and distinct angular distributions. Similarly, KK quarkonia can be distinguished from squarkonia by the size of their diphoton cross section and by their dilepton signals. Since many of our results are largely determined by gauge interactions, they will be useful for many other new physics scenarios as well.
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References
J.M. Smillie and B.R. Webber, Distinguishing Spins in Supersymmetric and Universal Extra Dimension Models at the Large Hadron Collider, JHEP 10 (2005) 069 [hep-ph/0507170] [SPIRES].
A. Datta, K. Kong and K.T. Matchev, Discrimination of supersymmetry and universal extra dimensions at hadron colliders, Phys. Rev. D 72 (2005) 096006 [Erratum ibid D 72 (2005) 119901] [hep-ph/0509246] [SPIRES].
A.J. Barr, Measuring slepton spin at the LHC, JHEP 02 (2006) 042 [hep-ph/0511115] [SPIRES].
A. Alves, O. Eboli and T. Plehn, It’s a gluino, Phys. Rev. D 74 (2006) 095010 [hep-ph/0605067] [SPIRES].
C. Athanasiou, C.G. Lester, J.M. Smillie and B.R. Webber, Distinguishing spins in decay chains at the Large Hadron Collider, JHEP 08 (2006) 055 [hep-ph/0605286] [SPIRES].
C. Athanasiou, C.G. Lester, J.M. Smillie and B.R. Webber, Addendum to ’Distinguishing spins in decay chains at the Large Hadron Collider’, hep-ph/0606212 [SPIRES].
L.-T. Wang and I. Yavin, Spin Measurements in Cascade Decays at the LHC, JHEP 04 (2007) 032 [hep-ph/0605296] [SPIRES].
C. Kilic, L.-T. Wang and I. Yavin, On the Existence of Angular Correlations in Decays with Heavy Matter Partners, JHEP 05 (2007) 052 [hep-ph/0703085] [SPIRES].
C. Csáki, J. Heinonen and M. Perelstein, Testing Gluino Spin with Three-Body Decays, JHEP 10 (2007) 107 [arXiv:0707.0014] [SPIRES].
M. Burns, K. Kong, K.T. Matchev and M. Park, A General Method for Model-Independent Measurements of Particle Spins, Couplings and Mixing Angles in Cascade Decays with Missing Energy at Hadron Colliders, JHEP 10 (2008) 081 [arXiv:0808.2472] [SPIRES].
O. Gedalia, S.J. Lee and G. Perez, Spin Determination via Third Generation Cascade Decays, Phys. Rev. D 80 (2009) 035012 [arXiv:0901.4438] [SPIRES].
H.-C. Cheng, Z. Han, I.-W. Kim and L.-T. Wang, Missing Momentum Reconstruction and Spin Measurements at Hadron Colliders, JHEP 11 (2010) 122 [arXiv:1008.0405] [SPIRES].
G. Moortgat-Pick, K. Rolbiecki and J. Tattersall, Early spin determination at the LHC?, Phys. Lett. B 699 (2011) 158 [arXiv:1102.0293] [SPIRES].
Y. Kats and M.D. Schwartz, Annihilation decays of bound states at the LHC, JHEP 04 (2010) 016 [arXiv:0912.0526] [SPIRES].
C.D. Carone, J.M. Conroy, M. Sher and I. Turan, Universal extra dimensions and Kaluza Klein bound states, Phys. Rev. D 69 (2004) 074018 [hep-ph/0312055] [SPIRES].
N. Fabiano and O. Panella, Threshold production of meta-stable bound states of Kaluza Klein excitations in Universal Extra Dimensions, Phys. Rev. D 81 (2010) 115001 [arXiv:0804.3917] [SPIRES].
T. Appelquist, H.-C. Cheng and B.A. Dobrescu, Bounds on universal extra dimensions, Phys. Rev. D 64 (2001) 035002 [hep-ph/0012100] [SPIRES].
D. Hooper and S. Profumo, Dark matter and collider phenomenology of universal extra dimensions, Phys. Rept. 453 (2007) 29 [hep-ph/0701197] [SPIRES].
H.-C. Cheng, K.T. Matchev and M. Schmaltz, Bosonic supersymmetry? Getting fooled at the CERN LHC, Phys. Rev. D 66 (2002) 056006 [hep-ph/0205314] [SPIRES].
H.-C. Cheng, K.T. Matchev and M. Schmaltz, Radiative corrections to Kaluza-Klein masses, Phys. Rev. D 66 (2002) 036005 [hep-ph/0204342] [SPIRES].
G. Servant and T.M.P. Tait, Is the lightest Kaluza-Klein particle a viable dark matter candidate?, Nucl. Phys. B 650 (2003) 391 [hep-ph/0206071] [SPIRES].
H.-C. Cheng, J.L. Feng and K.T. Matchev, Kaluza-Klein dark matter, Phys. Rev. Lett. 89 (2002) 211301 [hep-ph/0207125] [SPIRES].
H. Georgi, A.K. Grant and G. Hailu, Brane couplings from bulk loops, Phys. Lett. B 506 (2001) 207 [hep-ph/0012379] [SPIRES].
M.S. Carena, T.M.P. Tait and C.E.M. Wagner, Branes and orbifolds are opaque, Acta Phys. Polon. B 33 (2002) 2355 [hep-ph/0207056] [SPIRES].
T. Flacke, A. Menon and D.J. Phalen, Non-minimal universal extra dimensions, Phys. Rev. D 79 (2009) 056009 [arXiv:0811.1598] [SPIRES].
S.P. Martin, Diphoton decays of stoponium at the Large Hadron Collider, Phys. Rev. D 77 (2008) 075002 [arXiv:0801.0237] [SPIRES].
E. De Pree and M. Sher, Kaluza-Klein mesons in universal extra dimensions, Phys. Rev. D 72 (2005) 097701 [hep-ph/0507313] [SPIRES].
M. Beneke, P. Falgari and C. Schwinn, Soft radiation in heavy-particle pair production: all-order colour structure and two-loop anomalous dimension, Nucl. Phys. B 828 (2010) 69 [arXiv:0907.1443] [SPIRES].
M.E. Peskin and D.V. Schroeder, An Introduction to Quantum Field Theory, Westview Press, New York U.S.A. (1995).
V.A. Novikov et al., Charmonium and Gluons: Basic Experimental Facts and Theoretical Introduction, Phys. Rept. 41 (1978) 1 [SPIRES].
I.V. Tyutin and B.B. Lokhvitskii, Charge conjugation of non-Abelian gauge fields, Sov. Phys. J. 25 (1982) 346 [Izv. Vys. Uch. Zav. Fiz. 4 (1982) 62].
N.V. Smolyakov, Furry theorem for non-abelian gauge Lagrangians, Theor. Math. Phys. 50 (1982) 225 [SPIRES].
C.P. Burgess and G.D. Moore, The Standard Model: A Primer, Cambridge University Press, Cambridge U.K. (2007).
J.T. Goldman and H. Haber, Gluinonium: The hydrogen atom of supersymmetry, Physica D 15 (1985) 181.
W.-Y. Keung and A. Khare, Two-gluino bound states, Phys. Rev. D 29 (1984) 2657 [SPIRES].
M.R. Kauth, J.H. Kühn, P. Marquard and M. Steinhauser, Gluinonia: Energy Levels, Production and Decay, Nucl. Phys. B 831 (2010) 285 [arXiv:0910.2612] [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 [arXiv:0901.0002] [SPIRES].
C. Kim and T. Mehen, Color Octet Scalar Bound States at the LHC, Phys. Rev. D 79 (2009) 035011 [arXiv:0812.0307] [SPIRES].
K. Hagiwara and H. Yokoya, Bound-state effects on gluino-pair production at hadron colliders, JHEP 10 (2009) 049 [arXiv:0909.3204] [SPIRES].
V.D. Barger and A.D. Martin, Quarkonium production at pp colliders, Phys. Rev. D 31 (1985) 1051 [SPIRES].
V.D. Barger et al., Superheavy quarkonium production and decays: A new Higgs signal, Phys. Rev. D 35 (1987) 3366 [Erratum ibid D 38 (1988) 1632] [SPIRES].
E. Arik, O. Çakır, S.A. Çetin and S. Sultansoy, Fourth generation pseudoscalar quarkonium production and observability at hadron colliders, Phys. Rev. D 66 (2002) 116006 [hep-ph/0208169] [SPIRES].
S.P. Martin and J.E. Younkin, Radiative corrections to stoponium annihilation decays, Phys. Rev. D 80 (2009) 035026 [arXiv:0901.4318] [SPIRES].
J.E. Younkin and S.P. Martin, QCD corrections to stoponium production at hadron colliders, Phys. Rev. D 81 (2010) 055006 [arXiv:0912.4813] [SPIRES].
M.J. Herrero, A. Mendez and T.G. Rizzo, Production of heavy squarkonium at high energy pp colliders, Phys. Lett. B 200 (1988) 205 [SPIRES].
V.D. Barger and W.-Y. Keung, Stoponium decays to Higgs bosons, Phys. Lett. B 211 (1988) 355 [SPIRES].
M. Drees and M.M. Nojiri, Production and decay of scalar stoponium bound states, Phys. Rev. D 49 (1994) 4595 [hep-ph/9312213] [SPIRES].
G.V. Borisov, Y.F. Pirogov and K.R. Rudakov, Pair production of exotic particles at ( p ) p colliding beams, Z. Phys. C 36 (1987) 217 [SPIRES].
E. Chikovani, V. Kartvelishvili, R. Shanidze and G. Shaw, Bound states of two gluinos at the Tevatron and CERN LHC, Phys. Rev. D 53 (1996) 6653 [hep-ph/9602249] [SPIRES].
K. Cheung and W.-Y. Keung, Split supersymmetry, stable gluino and gluinonium, Phys. Rev. D 71 (2005) 015015 [hep-ph/0408335] [SPIRES].
E. Bouhova-Thacker, V. Kartvelishvili and A. Small, Search for gluino gluino bound states, Nucl. Phys. Proc. Suppl. 133 (2004) 122 [SPIRES].
E. Bouhova-Thacker, V. Kartvelishvili and A. Small, Search for gluino-gluino bound states with ATLAS, Nucl. Phys. Proc. Suppl. 152 (2006) 300 [SPIRES].
M. Drees and M.M. Nojiri, Proposed new signal for scalar top-squark bound-state production, Phys. Rev. Lett. 72 (1994) 2324 [hep-ph/9310209] [SPIRES].
C. Macesanu, C.D. McMullen and S. Nandi, Collider implications of universal extra dimensions, Phys. Rev. D 66 (2002) 015009 [hep-ph/0201300] [SPIRES].
C. Lin, A search for universal extra dimensions in the multi-lepton channel from pp collisions at \( \sqrt {s} = 1.8 \) TeV, Ph.D. Thesis, Yale University, New Haven U.S.A. (2005) FERMILAB-THESIS-2005-69.
U. Haisch and A. Weiler, Bound on minimal universal extra dimensions from B → X s γ, Phys. Rev. D 76 (2007) 034014 [hep-ph/0703064] [SPIRES].
I. Gogoladze and C. Macesanu, Precision electroweak constraints on Universal Extra Dimensions revisited, Phys. Rev. D 74 (2006) 093012 [hep-ph/0605207] [SPIRES].
J.L. Feng, J.-F. Grivaz and J. Nachtman, Searches for Supersymmetry at High-Energy Colliders, Rev. Mod. Phys. 82 (2010) 699 [arXiv:0903.0046] [SPIRES].
CMS collaboration, V. Khachatryan et al., Search for Supersymmetry in pp Collisions at 7TeV in Events with Jets and Missing Transverse Energy, Phys. Lett. B 698 (2011) 196 [arXiv:1101.1628] [SPIRES].
ATLAS collaboration, G. Aad et al., Search for supersymmetry using final states with one lepton, jets and missing transverse momentum with the ATLAS detector in \( \sqrt {s} = 7 \) TeV pp, Phys. Rev. Lett. 106 (2011) 131802 [arXiv:1102.2357] [SPIRES].
ATLAS collaboration, J.B.G. da Costa et al., 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, Phys. Lett. B 701 (2011) 186 [arXiv:1102.5290] [SPIRES].
CMS collaboration, S. Chatrchyan et al., Search for Supersymmetry in pp Collisions at \( \sqrt {s} = 7 \) TeV in Events with Two Photons and Missing Transverse Energy, Phys. Rev. Lett. 106 (2011) 211802 [arXiv:1103.0953] [SPIRES].
CMS collaboration, S. Chatrchyan et al., Search for Physics Beyond the Standard Model in Opposite-Sign Dilepton Events at \( \sqrt {s} = 7 \) TeV, JHEP 06 (2011) 026 [arXiv:1103.1348] [SPIRES].
ATLAS collaboration, G. Aad et al., Search for stable hadronising squarks and gluinos with the ATLAS experiment at the LHC, Phys. Lett. B 701 (2011) 1 [arXiv:1103.1984] [SPIRES].
J. Alwall, M.-P. Le, M. Lisanti and J.G. Wacker, Searching for Directly Decaying Gluinos at the Tevatron, Phys. Lett. B 666 (2008) 34 [arXiv:0803.0019] [SPIRES].
T. Sjöstrand, S. Mrenna and P.Z. Skands, PYTHIA 6.4 Physics and Manual, JHEP 05 (2006) 026 [hep-ph/0603175] [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].
G.P. Salam and G. Soyez, A practical Seedless Infrared-Safe Cone jet algorithm, JHEP 05 (2007) 086 [arXiv:0704.0292] [SPIRES].
ATLAS collaboration, G. Aad et al., Performance of the ATLAS b-tagging algorithms, ATLAS report, ATL-PHYS-PUB-2009-018 (2009).
CMS collaboration, Algorithms for b jet identification in CMS, CMS report, CMS PAS BTV-09-001 (2009).
CMS collaboration, Search for Randall-Sundrum gravitons decaying into two photons in 7TeV pp collisions with the CMS detector, CMS report, CMS PAS EXO-10-019 (2011).
D.A. Dicus, C.D. McMullen and S. Nandi, Collider implications of Kaluza-Klein excitations of the gluons, Phys. Rev. D 65 (2002) 076007 [hep-ph/0012259] [SPIRES].
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Kahawala, D., Kats, Y. Distinguishing spins at the LHC using bound state signals. J. High Energ. Phys. 2011, 99 (2011). https://doi.org/10.1007/JHEP09(2011)099
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DOI: https://doi.org/10.1007/JHEP09(2011)099