Results 71 to 80 of about 4,505 (197)

Single Top as Window on Heavy Quarks and Other New Physics

open access: yesAdvances in High Energy Physics, 2013
This paper discusses what the study of the electroweak production of single top quarks can tell us about additional quark generations, and how to distinguish the new quarks hypothesis from other kinds of new physics. We also suggest some new studies that
Andrea Giammanco
doaj   +1 more source

Acute and lifelong exercise modulate the tumorigenic potential of human lung cancer cells and their susceptibility to cisplatin

open access: yesExperimental Physiology, EarlyView.
Abstract The association between higher levels of physical activity and lower cancer risk and mortality is well established. However, a causal link is yet to be proven. Recent studies showed a decrease in the proliferation rates of cultured human cancer cells when the human serum used to stimulate them was conditioned by acute exercise. Here, we tested
Carlos M. Soares   +7 more
wiley   +1 more source

Why Quarks Are Unobservable

open access: yesPhilosophia Scientiæ, 2009
This essay deals with the question whether quarks—the basic components of matter and one of the youngest confirmed particles in high energy physics—can be observed directly or indirectly.
Tobias Fox
doaj   +1 more source

Meson spectrum in SU(N) gauge theories with quarks in higher representations: A check of Casimir scaling hypothesis

open access: yesResults in Physics, 2020
Gauge theories with gauge group SU(N) and quarks belonging to arbitrary representations of SU(N) form a rich landscape of QCD-like theories, whose study can shed new light on the properties of confinement.
Fabien Buisseret, Claude Semay
doaj   +1 more source

Quarks and Anomalies [PDF]

open access: yesInternational Journal of Modern Physics A, 2015
A nonperturbative understanding of neutral pion decay was an essential step towards the idea that strong interactions are governed by a color gauge theory for quarks. Some aspects of this work and related problems are still important.
openaire   +3 more sources

Arterial–venous differences of brain‐derived neurotrophic factor isoforms across the brain and muscle after exercise at different intensities

open access: yesThe Journal of Physiology, EarlyView.
Abstract figure legend Exercise‐induced increases in forearm venous plasma and serum brain‐derived neurotrophic factor (BDNF) are often assumed to be indicative of release from the brain. Sixteen healthy and physically fit adults (20–40 years old) were recruited to investigate whether exercise‐induced changes in forearm venous mature BDNF (mBDNF) and ...
Olga Tarassova   +10 more
wiley   +1 more source

Non‐invasive assessment of integrated cardiorespiratory network dynamics after physiological stress in humans

open access: yesThe Journal of Physiology, EarlyView.
Abstract figure legend This study aimed to develop a non‐invasive method for visualizing the cardiorespiratory network under baseline conditions and following isolated or combined exposure to hypoxia, exercise, and sleep deprivation. Twenty‐two healthy participants underwent assessments at rest and after normobaric hypoxia (FIO2${{F}_{{\mathrm{I ...
Cecilia Morandotti   +10 more
wiley   +1 more source

CLASSIFICATION OF PARTICLES AT ARBITRARY QUANTITY OF GENERATIONS. II. LEPTONS

open access: yesEast European Journal of Physics, 2017
The hypothesis on quark nature of the leptons is proposed. Leptons are compacted q3 -systems. It ensures the equality of modules for the electric charges of the proton and the electron. The classification of particles based on the U(Nf,g)×SU(3,c)×SU(4,fs)
Yu. V. Kulish
doaj  

Exercise hyperpnoea: Unravelling layers of regulation

open access: yesThe Journal of Physiology, EarlyView.
Abstract figure legend Intensity‐dependent changes in hypercapnic ventilatory response (HCVR) and feedforward gain (GEX) during exercise hyperpnoea below the respiratory compensation point (RCP). Participants (N = 20; 10 females) completed a 44 min step‐incremental cycling protocol in the moderate (below gas exchange threshold (GET)) and heavy ...
Nasimi A. Guluzade   +2 more
wiley   +1 more source

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