Octetonium at the LHC

Abstract

Several models of new physics, such as grand unified theories, Pati-Salam models, chiral color models, etc., predict the existence of an $SU(2)_L$ doublet of color-octet scalars (COS). In the Manohar-Wise model, the Yukawa couplings of the COS are assumed to be consistent with Minimal Flavor Violation ensuring constraints from flavor physics are satisfied even for relatively light scalars. In this simple model we consider the production of color singlet bound states of COS that we call octetonium. Octetonium are mainly produced via gluon-gluon fusion and have significant production cross sections at the LHC. They can decay to pairs of gluons or electroweak gauge bosons. If the masses of the octetonia are 1 TeV or less, these states will be visible as resonances in $\gamma \gamma, W^+W^-, ZZ$, and $ \gamma Z$.Comment: 4 pages, submitted to the proceedings of SUSY09 conference, Boston, MA, June 200

Squarkonium, diquarkonium, and octetonium at the LHC and their diphoton decays

“…We then consider various color exotics as sextet diquark or color octet scalar. Diphoton from Octetonium can well be of the right magnitude to explain the LHC di-photon excess as in [18][19][20] for some parameter choice. Diquarkonium formed by color sextet diquark with electric charge to be 4/3 also predicts the di-photon signal as 12 fb at 13 TeV LHC with the enhancement from color factor and electric charge.…”

“…studied in [18][19][20]. The di-photon and digluon decay widths of this octetonium at the leading order can be found as…”

“…Another example of exotic onium is color-singlet octetonium formed by a pair of color-octet scalars φ 8 with the quantum numbers (8, 2, 1/2) [12]. Such octectonium state has been carefully studied in [18][19][20]. The di-photon and digluon decay widths of this octetonium at the leading order can be found as…”

“…with |R(0)| 2 /m 2 η 8 ≃ 1.2 GeV [11] for a 750 GeV octetonium. In addition, total decay width of octectonium also depends on the Yukawa coupling η U due to new decay channel [18][19][20] such as top quark pairs and σ(pp → η 8 → γγ) can well be of the right magnitude to explain the LHC di-photon excess as in [18][19][20] for some choice of η U .…”

Renormalizable SU(5) unification

“…The phenomenological aspects of the colored octets have been investigated in Refs. [28][29][30][31][32][33][34][35][36][37][38][39][40][41][42][43][44][45][46].…”