Subscribe to the gold package and get unlimited access to Shamra Academy
Register a new userNew Bound States of Heavy Quarks at LHC and Tevatron
136
0
0.0
(
0
)
Ask ChatGPT about the research
No Arabic abstract
The present paper is based on the assumption that heavy quarks bound states exist in the Standard Model (SM). Considering New Bound States (NBS) of top-anti-top quarks (named T-balls) we have shown that: 1) there exists the scalar 1S--bound state of $6t+6bar t$; 2) the forces which bind the top-quarks are very strong and almost completely compensate the mass of the twelve top-anti-top-quarks in the scalar NBS; 3) such strong forces are produced by the Higgs-top-quarks interaction with a large value of the top-quark Yukawa coupling constant $g_tsimeq 1$. Theory also predicts the existence of the NBS $6t + 5bar t$, which is a color triplet and a fermion similar to the $t$-quark of the fourth generation. We have also considered the b-quark-replaced NBS, estimated the masses of the lightest fermionic NBS: $M_{NBS}gtrsim 300$ GeV, and discussed the larger masses of T-balls. We have developed a theory of the scalar T-balls condensate and predicted the existence of three SM phases. Searching for heavy quark bound states at the Tevatron and LHC is discussed. We have constructed the possible form-factors of T-balls, and estimated the charge multiplicity coming from the T-balls decays.
rate research
Read More
The present talk is based on the assumption that New Bound States (NBSs) of top-anti-top quarks (named T-balls) exist in the Standard Model (SM): a) there exists the scalar 1S - bound state of 6t+6bar t - the bound state of 6 top-quarks with their 6 anti-top-quarks; b) the forces which bind these top-quarks are very strong and almost completely compensate the mass of the 12 top-anti-top-quarks forming this bound state; c) such strong forces are produced by the interactions of top-quarks via the virtual exchange of the scalar Higgs bosons having the large value of the top-quark Yukawa coupling constant g_tsimeq 1. Theory also predicts the existence of the NBS 6t + 5bar t, which is a color triplet and a fermion similar to the t-quark of the fourth generation. We have also considered b-replaced NBSs: n_b b + (6t + 6bar t - n_b t) and n_b b + (6t + 5bar t - n_b t), etc. We have estimated the masses of the lightest b-replaced NBS: M_{NBS}simeq (300 - 400) GeV, and discussed the larger masses of the NBSs. We have developed a theory of the scalar T-balls condensate, and predicted the existence of the three SM phases, calculating the top-quark Yukawa coupling constant at the border of two phases (with T-balls condensate and without it) equal to: g_t approx 1. The searching for the Higgs boson H and T-balls at the Tevatron and LHC is discussed.
We review the status of the QCD corrected cross sections and kinematic distributions for the production of a Higgs boson in association with top quark or bottom quark pairs at the Fermilab Tevatron and at the LHC. Results for b-bbar-H production are presented in the Minimal Supersymmetric Model, where the rates can be greatly enhanced relative to the Standard Model rates. We place particular emphasis on theoretical uncertainties due to renormalization and factorization scale dependence and on the uncertainties coming from the Parton Distribution Functions.
We present our study of bound states of the fourth generation quarks in the range of 500 to 700 GeV,where we expect binding energies are mainly of Yukawa origin, with QCD subdominant. Near degeneracy of their masses exhibits a new isospin. We find the most interesting is the production of a color octet, isosinglet vector meson via $qbar q to omega_8$. Its leading decay modes are $pi_8^pm W^mp$, $pi_8^0Z^0$, and constituent quark decay, with $qbar q$ and $tbar t$ and $bbar b$ subdominant. The color octet, isovector pseudoscalar $pi_8$ meson decays via constituent quark decay, or to $Wg$. This work calls for more detailed study of 4th generation phenomena at LHC.
In this report we review recent theoretical progress and the latest experimental results in jet substructure from the Tevatron and the LHC. We review the status of and outlook for calculation and simulation tools for studying jet substructure. Following up on the report of the Boost 2010 workshop, we present a new set of benchmark comparisons of substructure techniques, focusing on the set of variables and grooming methods that are collectively known as top taggers. To facilitate further exploration, we have attempted to collect, harmonise, and publish software implementations of these techniques.
In the present paper we argue that the correction to the Higgs mass coming from the bound state of 6 top and 6 anti-top quarks, predicted early by C.D. Froggatt, H.B. Nielsen and L.V. Laperashvili, leads to the Standard Model (SM) vacuum stability and confirms the accuracy of the multiple point principle (principle of degenerate vacua) for all experimentally valued SM parameters (Higgs mass, top-quark mass, etc.). The aim to get the vacua degeneracy requires a mass of the bound state in the region of 770 GeV.
Log in to be able to interact and post comments
comments
Fetching comments
Sign in to be able to follow your search criteria
