This article presents a search for flavour-changing neutral currents in the decay of a top quark into an up-type (q=c, u) quark and a Higgs boson, where the Higgs boson decays into two photons. The proton-proton collision data set analysed amounts to 36.1 fb1ats=13\\documentclass[12...
The mechanism of quark rearrangement of color clusters in the decays of particles with complicated inner structure of type (1) or (2) can further reduce the decay width of cryptoexotic baryons and make them anomalously narrow (their widths may become as small as several tens of MeV). Here,...
Strong decays of several light mesons are investigated in a flux-tube quark model, where a qq pair is created either in the 3S1 state or in the 3P0 state within the flux tube. For comparison, decay rates are also calculated in a naive 3P0 model, where a qq pair is created anywhere ...
As such it is suggestive of an explanation in terms of a U(2)n flavor symmetry that distinguishes between the third generation of fermions as singlets and the first two generations as doublets [1]. Within this context Ref. [2] looked at the ability of leptoquark models, in particular ...
The transition form factors describing the semileptonic decays of heavy pseudoscalar mesons are investigated within a relativistic constituent quark model formulated on the light-front. For the first time the form factors are calculated in the whole accessible kinematical region, adopting meson wave func...
The quark models seem to over predict the number of baryon states, giving rise to the problem of the missing resonances. The effective theories give rise to some dynamically generated states as a consequence of the interaction of two hadrons, which fit some of the existing states, and also ...
Riquer, Diquark-antidiquarks with hidden or open charm and the nature of X(3872), Phys. Rev.D 71 (2005) 014028 [hep-ph/0412098] [INSPIRE]. Z.-G. Wang and T. Huang, Analysis of the X(3872), Z c(3900) and Z c(3885) as axial-vector tetraquark states with QCD sum rules, ...
The observed inclusive decay of B-mesons into eta' + X is interpreted as theconsequence of the gluonic decay of the b-quark into an s-quark. As a result ofthe QCD anomaly this decay proceeds partly as the decay b ---> s + eta',similar to b ---> s + J/psi. The hadronic reco...
We study the impact of a scalar leptoquark, S1, on B →μν¯ decay. We find that, for m S1 ∼ 1 TeV, the S1 leptoquark can modify the B →μν¯ rate significantly. Such a leptoquark can in principle also alter the B →τν¯ rate. However, current searches from LHC ...
We consider the dependence of the pion and kaon decay constants on the up, down and strange quark masses in QCD with strict isospin symmetry. The role of d... XYMFM Guo - 《Nuclear Physics A Journal Devoted to the Experimental Study of the Fundamental Constituents of Matter & Their Action...