Results 111 to 120 of about 21,627,885 (312)

Masses of doubly heavy-quark baryons in an extended chromomagnetic model [PDF]

open access: yes, 2018
We extend the chromomagnetic model by further considering the effect of color interaction. The effective mass parameters between quark pairs ($m_{qq}$ or $m_{q\bar{q}}$) are introduced to account both the effective quark masses and the color interaction ...
Xin-Zhen Weng, Xiao-Lin Chen, W. Deng
semanticscholar   +1 more source

Commuting by bicycle (vs. by car) is associated with improved aerobic power, microvascular function and diminished CO2 output in the atmosphere

open access: yesExperimental Physiology, EarlyView.
Abstract The study investigated whether bicycle compared with car commuting, over relatively small distances, has positive effects on physiological variables, cardiometabolic fitness and CO2 output in the atmosphere. Bike Commuters (11 M, 15 F; age [median value (interquartile range)] 51.5 (38.3–56.8) years; body mass index [BMI] 22.8 (21.0–24.1) kg m ...
Caterina Ursella   +11 more
wiley   +1 more source

A relativistic treatment of pion wave functions in the annihilation antiproton-proton -> pi^-pi^+

open access: yes, 2004
Quark model intrinsic wave functions of highly energetic pions in the reaction \bar pp->\pi^-\pi^+ are subjected to a relativistic treatment. The annihilation is described in a constituent quark model with A2 and R2 flavor-flux topology and the ...
B. El-Bennich   +3 more
core   +1 more source

Cerebral oxygen extraction across different exercise intensities: Role of arterial PCO2${P_{{\mathrm{C}}{{\mathrm{O}}_2}}}$

open access: yesExperimental Physiology, EarlyView.
Abstract Stability in cerebral oxygen extraction fraction (OEF) is typically determined by alterations in cerebral blood flow (CBF). At rest, arterial partial pressure of carbon dioxide (PaCO2${P_{{\mathrm{aC}}{{\mathrm{O}}_2}}}$) and OEF exhibit a strong inverse relationship owing to the powerful influence of PaCO2${P_{{\mathrm{aC}}{{\mathrm{O}}_2}}}$
L. Madden Brewster   +11 more
wiley   +1 more source

Nature of the doubly-charmed tetraquark $T_{cc}^+$ in a constituent quark model [PDF]

open access: green, 2022
Pablo G. Ortega   +3 more
openalex   +1 more source

Running economy and lower‐limb anthropometry in adult male Kenyan and Danish middle‐ and long‐distance runners and in untrained adolescents

open access: yesExperimental Physiology, EarlyView.
Abstract Kenyan athletes have dominated competitive middle‐ and long‐distance running for more than half a century, a phenomenon suggested to be attributable, at least in part, to superior running economy. Given that lower‐leg anthropometry is an important determinant of running economy, a key contributor to the athletic performance of Kenyan runners ...
Henrik B. Larsen   +5 more
wiley   +1 more source

Bridging the chiral symmetry and confinement with singularity

open access: yesPhysics Letters B, 2020
We consider a holographic quark model where the confinement is a consequence of the quark condensate. Surprisingly, the equation of motion of our holographic model can be mapped to the old spin-less bag model.
Yoon-Seok Choun, Sang-Jin Sin
doaj   +1 more source

Quark star matter at finite temperature in a quasiparticle model

open access: yesEuropean Physical Journal C: Particles and Fields, 2021
We study the thermodynamic properties of asymmetric quark matter, large mass quark stars (QSs), and proto-quark stars (PQSs) within the quasiparticle model. Considering the effects of temperature within quasiparticle model can significantly influence the
Peng-Cheng Chu   +5 more
doaj   +1 more source

Eight weeks of post‐exercise local heating does not improve cognition and plasma brain‐derived neurotrophic factor concentrations

open access: yesExperimental Physiology, EarlyView.
Abstract Exercise and heat stress have been reported to independently provide benefits to brain health. We tested the hypothesis that 8 weeks of post‐exercise local heating, passive local heating only, or exercise training only improves cognitive performance compared to a control group.
Jem L. Cheng   +6 more
wiley   +1 more source

Kaon-nucleon interaction in the extended chiral SU(3) quark model

open access: yes, 2005
The chiral SU(3) quark model is extended to include the coupling between the quark and vector chiral fields. The one-gluon exchange (OGE) which dominantly governs the short-range quark-quark interaction in the original chiral SU(3) quark model is now ...
F. Huang   +4 more
core   +1 more source

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