Results 91 to 100 of about 21,627,885 (312)

RELATIVISTIC QUARK MODELS [PDF]

open access: yes, 2001
The application of relativistic constituent quark models to the evaluation of the electromagnetic properties of the nucleon and its resonances is addressed. The role of the pair creation process in the Feynmann triangle diagram is discussed and the importance both of choosing the light-front formalism and of using a Breit frame where the plus component
openaire   +2 more sources

Plate tectonics in the microscopy realm: Molecular insights into morphological variability of Peridinium willei (Peridiniales, Dinophyceae)

open access: yesTAXON, EarlyView.
Abstract Freshwater Peridinium willei (Peridiniaceae) is globally distributed, but reports linking its morphologies with DNA sequence data remain scarce. The taxonomy of the species, and its infraspecific taxa, remain ambiguous due to the lack of DNA sequence data for the original and type material.
Arwin Ahmadpur   +17 more
wiley   +1 more source

The Quark Spin Distributions of the Nucleon

open access: yes, 1998
The quark helicity measured in polarized deep inelastic scattering is different from the quark spin in the rest frame of the nucleon. We point out that the quark spin distributions $\Delta q_{RF}(x)$ are connected with the quark helicity distributions ...
Aoki   +11 more
core   +2 more sources

Linearized Boltzmann-Langevin model for heavy quark transport in hot and dense QCD matter [PDF]

open access: yesPhysical Review C, 2018
In relativistic heavy-ion collisions, the production of heavy quarks at large transverse momenta is strongly suppressed compared to proton-proton collisions.
W. Ke, Yingru Xu, S. Bass
semanticscholar   +1 more source

Nutritional approach in a growing Jack Russell terrier with gall bladder agenesis

open access: yesVeterinary Record Case Reports, EarlyView.
Abstract An asymptomatic male Jack Russell terrier diagnosed at the age of 18 weeks with congenital gall bladder agenesis, confirmed by computed tomography scan, after finding abnormally high values for liver enzymes in a routine blood count. Treatment with liver‐protective agents S‐adenosylmethionine and ursodeoxycholic acid was initiated. At 6 months
Tamara Seghers   +3 more
wiley   +1 more source

Search for single production of vector-like quarks decaying into Wb in pp collisions at s $$ \sqrt{s} $$ = 13 TeV with the ATLAS detector

open access: yesJournal of High Energy Physics, 2019
A search for singly produced vector-like quarks Q, where Q can be either a T quark with charge +2/3 or a Y quark with charge −4/3, is performed in proton–proton collision data at a centre-of-mass energy of 13 TeV corresponding to an integrated luminosity
The ATLAS collaboration   +2932 more
doaj   +1 more source

Pion parton distribution functions with the nonrelativistic constituent quark model

open access: yesNuclear Physics B, 2023
We calculate the valence quark distribution functions of the π meson using the non-relativistic chiral constituent quark model. The π wave function is obtained by solving the two-body Schrödinger equation within the framework of constituent quark model ...
Qian Wu   +6 more
doaj   +1 more source

The Quark Orbital Angular Momentum in a Light-Cone Representation

open access: yes, 1998
We perform an analysis of the quark angular momentum in a light-cone representation by taking into account the effect due to the Melosh-Wigner rotation and find that there is a relativistic correction factor connecting the quark orbital angular momentum ...
Ma, Bo-Qiang, Schmidt, Ivan
core   +2 more sources

Understanding the charmed states recently observed by the LHCb and BABAR Collaborations in the quark model [PDF]

open access: yes, 2014
Comparing the expected spectroscopy in the relativistic quark model and the predicted strong decays in the $^3P_0$ model employing the realistic wave functions from the relativistic quark model with the measured properties of the LHCb and BaBar charmed ...
Q. Lu, Demin Li
semanticscholar   +1 more source

Peri‐operative rehabilitation in patients undergoing elective cardiac valve surgery: a randomised controlled trial

open access: yesAnaesthesia, EarlyView.
Summary Introduction Patients with valvular heart disease are at high risk of postoperative pulmonary complications, which contribute to morbidity and mortality. However, few studies have focused specifically on peri‐operative rehabilitation in this patient population.
Yuting Liu   +16 more
wiley   +1 more source

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