Results 61 to 70 of about 225,392 (278)

The Quark Orbital Angular Momentum in a Light-Cone Representation

, 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

Photon distribution amplitudes and light-cone wave functions in chiral quark models [PDF]

, 2006
The leading- and higher-twist distribution amplitudes and light-cone wave functions of real and virtual photons are analyzed in chiral quark models. The calculations are performed in the nonlocal quark model based on the instanton picture of QCD vacuum ...
A. E. Dorokhov, A. E. Dorokhov, A. L. Kataev, A. S. Bagdasaryan, A. S. Gorsky, Alexander E. Dorokhov, Enrique Ruiz Arriola, G. Ripka, G. V. Efimov, I. V. Anikin, N. I. Kochelev, O. V. Teryaev, S. V. Esaibegian, S. V. Mikhailov, Wojciech Broniowski   +14 more
core   +2 more sources

Quark Matter in the NJL Model with a Vector Interaction and the Structure of Hybrid Stars [PDF]

, 2022
G. B. Alaverdyan
openalex   +1 more source

On the Naturalistic Grounds of Grounding

Ratio, EarlyView.
ABSTRACT This paper examines whether grounding can be naturalized. We adopt a tripartite framework—Ocat (scientific catalogue of existents), Otyp (ontological types), and metaphysics (natures/modal profiles)—and show that classifying as such the relata of putative grounding claims forces a dilemma.
Raoni Arroyo, Jonas R. Becker Arenhart
wiley   +1 more source

Charge symmetry violation in the parton distributions of the nucleon [PDF]

, 2000
We point out that charge symmetry violation in both the valence and sea quark distributions of the nucleon has a non-perturbative source. We calculate this non-perturbative charge symmetry violation using the meson cloud model, which has earlier been ...
A. D. Martin, A. D. Martin, A. I. Signal, A. I. Signal, A. O. Bazarko, A. W. Schreiber, A. W. Thomas, B. Q. Ma, B. Q. Ma, B. Q. Ma, C. Boros, C. Boros, C. Boros, C. Caso, C. J. Benesh, C. J. Benesh, E. Rodionov, E. Sather, F. Abe, F. Close, F. G. Cao, Fu-Guang Cao, G. A. Miller, H. Holtmann, H. L. Lai, J. J. Aubert, J. J. de Swart, J. Speth, J. T. Londergan, J. T. Londergan, J. T. Londergan, J. T. Londergan, J. T. Londergan, M. Arneodo, M. Glück, M. Glück, M. Miyama, R. E. Peierls, R. G. E. Timmermans, R. L. Jaffe, S. A. Rabinowitz, S. Kumano, W. G. Seligman, W. Melnitchouk   +43 more
core   +2 more sources

Understanding pentaquarks with various quark models

Physics Letters B, 2004
The pentaquark state recently discovered has been studied with three quark models which either fit the nucleon spin structure or the $NN$ scattering. A minimum $ ^+$ mass of 1620 MeV is obtained both for the ${1/2}^\pm$ state. The mixing of various color structure configurations, which would reduce the mass of the penta-quark state, should be taking ...
Ping, Jialun, Qing, Di, Wang, Fan, Goldman, T.   +3 more
openaire   +2 more sources

Impact of a 12‐week high‐intensity interval training intervention on cardiac structure and function after COVID‐19 at 12‐month follow‐up

Experimental Physiology, EarlyView.
Abstract In patients previously hospitalised for COVID‐19, a 12‐week high‐intensity interval training (HIIT) intervention has previously been shown to increase left ventricular mass (LVM) immediately after the intervention. In the present study, we examined the effects of the same HIIT scheme on LVM, pulmonary diffusing capacity, symptom severity and ...
Iben Elmerdahl Rasmussen, Mathilde Løk, Cody Garett Durrer, Anna Agnes Lytzen, Frederik Foged, Vera Graungaard Schelde, Josephine Bjørn Budde, Rasmus Syberg Rasmussen, Emma Fredskild Høvighoff, Villads Rasmussen, Mark Lyngbæk, Simon Jønck, Rikke Krogh‐Madsen, Birgitte Lindegaard, Peter Godsk Jørgensen, Lars Køber, Niels Vejlstrup, Bente Klarlund Pedersen, Mathias Ried‐Larsen, Morten Asp Vonsild Lund, Ronan M. G. Berg, Regitse Højgaard Christensen   +21 more
wiley   +1 more source

Pion parton distribution functions with the nonrelativistic constituent quark model

Nuclear 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, Chengdong Han, Di Qing, Wei Kou, Xurong Chen, Fan Wang, Ju-Jun Xie   +6 more
doaj   +1 more source

Impact of exercise training on tumour‐infiltrating T cells in human prostate cancer: A secondary analysis of a randomized controlled trial (PRO‐TEST)

Experimental Physiology, EarlyView.
Abstract Exercise training reduces tumour growth by increasing tumour‐infiltrating T‐cell density in preclinical models. However, it remains unknown whether exercise training can modify intratumoural T cells in humans.The aim of this study was to compare the effects of an exercise training intervention versus control on human prostate intratumoural T ...
Simon Nørskov Thomsen, Emil Wriedt, Marianne Gardar Stærk, Sissal Sigmundsdottir Djurhuus, Birgitte Grønkær Toft, Sabrina Wielsøe, Andreas Røder, Thomas Hasselager, Peter Busch Østergren, Henrik Jakobsen, Klaus Brasso, Jesper Frank Christensen, Louise Lang Lehrskov, Casper Simonsen   +13 more
wiley   +1 more source

Proto-strange quark stars from density-dependent quark mass model

European Physical Journal C: Particles and Fields
In this paper, we investigate the evolution of strange quark stars (SQS) from birth as proto-strange quark stars to maturity as stable SQSs at a zero temperature.
Adamu Issifu, Franciele M. da Silva, Débora P. Menezes   +2 more
doaj   +1 more source