Quarks: Currents and constituents
نویسندگان
چکیده
منابع مشابه
Perturbative Matching of Heavy-Light Currents with NRQCD Heavy Quarks
Lattice studies of hadronic matrix elements require matching between operators in full continuum QCD and those in the lattice theory being simulated. In the present article we will focus on an effective lattice theory which combines nonrelativistic (NRQCD) heavy quarks and clover light quarks. We wish to match the theories correct through O( p M , α p M , α ap). For heavy meson (e.g. B and B∗) ...
متن کاملGinger and Its Pungent Constituents Non-Competitively Inhibit Serotonin Currents on Visceral Afferent Neurons
Nausea and emesis are a major side effect and obstacle for chemotherapy in cancer patients. Employ of antiemetic drugs help to suppress chemotherapy-induced emesis in some patients but not all patients. Ginger, an herbal medicine, has been traditionally used to treat various kinds of diseases including gastrointestinal symptoms. Ginger is effective in alleviating nausea and emesis, particularly...
متن کاملSearch for flavor changing neutral currents in decays of top quarks
We present a search for flavor changing neutral currents in decays of top quarks. The analysis is based on a search for t ¯ t → ℓ ′ νℓ ¯ ℓ+jets (ℓ, ℓ ′ = e, µ) final states using 4.1 fb −1 of integrated luminosity of p¯ p collisions at √ s = 1.96 TeV. We extract limits on the branching ratio B(t → Zq) (q = u, c quarks), assuming anomalous tuZ or tcZ couplings. We do not observe any sign of such...
متن کاملAnisotropic lattice QCD studies of penta-quarks and tetra-quarks
Anisotropic lattice QCD studies of penta-quarks(5Q) with JP = 1/2± and 3/2± are presented at the quenched level together with tetra-quarks(4Q). The standard gauge action at β = 5.75 and O(a) improved quark (clover) action with κ = 0.1410(0.010)0.1440 are employed on the anisotropic lattice with the renormalized anisotropy as/at = 4. The “hybrid boundary condition(HBC)” is adopted to discriminat...
متن کاملA QUARTIC POTENTIAL FOR THE NUCLEONIC QUARKS
We assume that each valence quark in a nucleon is in a phenomenological modified harmonic oscillator potential of the form: ( l+yo) (ar +br+cr +dr ), where a, b, c and d are constants and ? is one of the Dirac matrices. Then by making use of a suitable ansatz, the Dirac equation has a very simple solution which is exact. We then have calculated the static properties of the nucleon in the ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review D
سال: 1974
ISSN: 0556-2821
DOI: 10.1103/physrevd.9.1095