【摘 要】
：
We study the decay of the SM Higgs boson to a massive charm quark pair at the next-to-next-to-leading order QCD and next-to-leading order electroweak.At the second order of QCD coupling,we consider the exact cal-culation of flavour-singlet contributions w
【机 构】
：
School of Physics,Shandong University,Jinan 250100,China
论文部分内容阅读
We study the decay of the SM Higgs boson to a massive charm quark pair at the next-to-next-to-leading order QCD and next-to-leading order electroweak.At the second order of QCD coupling,we consider the exact cal-culation of flavour-singlet contributions where the Higgs boson couples to the internal top and bottom quark.Help-ful information on the running mass effects related to Yukawa coupling may be obtained by analyzing this process.High precision production for h → c(c) within the SM makes it possible to search for new physics that may induce rel-atively large interactions related to the charm quark.As an example,we evaluate the axion-like particle associate production with a charm quark pair in the Higgs decay and obtain some constraints for the corresponding paramet-ers under some assumptions.
其他文献
A multi-nucleon transfer and cluster decay experiment,7Li(11B,14C* → α+10Be)α,is conducted at an incident beam energy of 55 MeV.This reaction channel has a significantly large Q-value,which favors populating the high lying resonant states in 14C.The decay
We calculate photon sphere rph and critical curve bc for a quantum corrected Schwarzschild black hole,finding that they violate universal inequalities proved for asymptotically flat black holes that satisfy the null energy condition in the framework of Ei
We explore constraints on various new physics resonances from four top-quark production based on cur-rent experimental data.Both light and heavy resonances are studied in this work.A comparison of the full width ef-fect and narrow width approximation is a
Primordial black holes have been considered attractive dark matter candidates,whereas some of the pre-dictions rely heavily on the near-horizon physics that remains to be tested experimentally.As a concrete alternative,thermal 2-2-holes closely resemble b
We have calculated the mass spectra for the (D)(*)sD(*) molecular states and sc(qc) tetraquark states with JP =0+,1+,2+.The masses of the axial-vector (D)sD*,(D)*sD molecular states and 1[se]⊕0[(qc)],0[sc]⊕ 1[(qc)]tetra-quark states are predicted to be ap
The BLMSSM is an extension of the minimal supersymmetric standard model (MSSM).Its local gauge group is S U(3)C × S U(2)L × U(1)y × U(1)B × U(1)L.Supposing the lightest scalar neutrino is a dark matter candid-ate,we study the relic density and the spin in
The magnetic moment (aγ) and weak magnetic moment (aw) of charged leptons and quarks are sensit-ive to quantum effects of new physics heavy resonances.In effective field theory,aγ and aw are induced by two in-dependent operators.Therefore,one has to measu
One method of probing new physics beyond the Standard Model is to check the correlation among high-er-dimensional operators in the effective field theory.We examine the strong correlation between the processes pp--→ tHq and pp-→ tq,which both depend on th
The isospin effects of projectile fragmentation at intermediate energies are investigated using an isospin-dependent Boltzmann-Langevin model.The collisions of mass-symmetric reactions including 58Fe,58Ni+58Fe,and 58Ni at intermediate energies,in the 30 t
In our previous studies[Phys.Rev.C 97,044619(2018);Phys.Rev.C 103,044610(2021)],a universal odd-even staggering(OES)has been observed in extensive cross sections of isotopes not far from stability,meas-ured for different fragmentation and spallation react