Masses and Weak Decay Properties of Heavy-quark Baryons from QCD Sum Rules and Production of Heavy Mesons in High Energy Collisions
Bijit Singha
10.1184/R1/10561127.v1
https://kilthub.cmu.edu/articles/thesis/Masses_and_Weak_Decay_Properties_of_Heavy-quark_Baryons_from_QCD_Sum_Rules_and_Production_of_Heavy_Mesons_in_High_Energy_Collisions/10561127
Quantum Chromodynamics Sum Rules (QCD Sum Rules) is a non-perturbative technique which uses Wilson’s Operator Product Expansion of n-point functions and quark-hadron<br>duality together to extract various physical properties of hadrons. In this dissertation, we use QCD Sum Rules to calculate the masses of charmed lambda ( <b>Λ</b><sub>c</sub><sup>+</sup> ), strange lambda ( <b>Λ</b><sup>0</sup>), and bottom lambda ( <b>Λ</b><sub>b</sub><sup>0</sup>) baryons. We extend this framework to consider charm to strange quark transition in the presence of an external pion field to estimate the coupling corresponding to the Cabibbo-favored weak decay process: <b>Λ<sub>c </sub></b>--> <b>Λ<sup>0 + </sup></b><b>π<sup>+ . </sup></b>This framework can be used further to estimate the Cabibbo-favored and Cabibbo-suppressed decays of the heavy-quark baryons. In the second part of this dissertation, we calculate the production cross-section of B mesons in unpolarized proton-proton and and heavy-ion collisions at square root s = 200 GeV with the main aspect being the fragmentation of a color-octet bottom-antibottom quark pair to create B mesons.
2019-11-22 20:57:02
charmed baryon
strange baryon
bottom baryon
QCD sum rules
high-energy collisions