We have investigated the role of 4th generation quarks (t′, b′) on the B- B mixing, B meson rare decay and B meson CP violation. Deviating from previous analysis of many authors, we impose a set of assumptions in the KM matrix elements which we feel are very reasonable. These mild...
Twitter Google Share on Facebook hadron Thesaurus Encyclopedia Wikipedia Related to hadron:baryon had·ron (hăd′rŏn′) n. Any of a class of subatomic particles that are composed of two or three quarks and participate in strong interactions. The class of hadrons is divided into the mesons...
Introduction In the early 1960s, Gell-Mann and Zweig proposed the multiquark states beyond the conventional meson and baryon in the quark model [1,2]. With the development of QCD, more complex quark structures are allowed theoretically. These unconventional hadrons are called exotic hadrons, suc...
Understanding the quark composition of hadrons has been a central goal in nonperturbative quantum chromodynamics for decades. Standard hadrons are traditio... S Padhan 被引量: 0发表: 2024年 Exotic few-baryon systems with a heavy meson The recent findings of hadronic molecules, such as X(3872...
There is also the possibility to describe the internal structure of the pentaquark in which the light and heavy diquarks bind first into a tetraquark, then interacting with the light anti-quark, [[(cq)c3¯ (q q )c3¯ ]q¯c3¯ ]. The two internal structures provides a realistic ...
Measurement of the B(sup degree ovr sub s) meson lifetime using semileptonic decays. The lifetime of the B{sub X}{sup 0} meason is measured using the semileptonic decay B{sub S}{sup 0} {yields} D{sub S}{sup -/+}vX. The data sample consists ... F Abe,H Akimoto,A Akopian,...
In the Standard Model of particle physics, the strength of the couplings of the b quark to the u and c quarks, |Vub| and |Vcb|, are governed by the coupling of the quarks to the Higgs boson. Using data from the LHCb experiment at the Large Hadron Collide
The argument: since dd quark has a larger invariant mass than a uu quark the combination of down anti-down must have a larger invariant mass than the up anti-up one is wrong. The four vector algebra comes out that both have the mass of the π0π0. 3) As the quarks ...
In some cases even meson three-body effects could play an important role [34, 35]. Or, if the interaction between the (anti-)quarks is dominated by irreducible three- and four-body forces, a compact four-quark state may even arise with no preferred internal clustering. In this paper we ...
and two light quarks interactionqq'for the diquark picture. It should be noted that we discuss the separation of light diquark by the good or bad spin case. Thus the contribution from light diquark are suppressed, then thecqinteraction inside the diquark is assumed to be the dominant [41...