Results 101 to 110 of about 200,127 (222)

The direct coupling of light quarks to heavy di-quarks

Physics Letters B, 2019
In the limit mQ>mQvrel>mQvrel2≫ΛQCD hadronic states with two heavy quarks Q should be describable by a version of HQET where the heavy quark is replaced by a di-quark degree of freedom.
Haipeng An, Mark B. Wise
doaj   +1 more source

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

Results 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

The Colour of Quarks

, 1995
It is shown that colour can only be defined on gauge invariant states. Since the ability to associate colour with constituent quarks is an integral part of the constituent quark model, this means that, if we want to extract constituent quarks from QCD ...
Buchholz, David McMullan, de Forcrand, Dirac, Fermi, Gribov, Haag, Jackiw, Lavelle, Lavelle, Lavelle, Martin Lavelle, McMullan, Neubert, Pascual, Wilson   +15 more
core   +1 more source

Sex and performance‐level differences in aerobic and haematological parameters among elite ski mountaineering athletes

Experimental Physiology, EarlyView.
Abstract Ski mountaineering (SkiMo) is a new Olympic sport with extreme endurance demands and altitude exposure. Previous studies have focused on traditional cardiorespiratory variables, such as maximal oxygen consumption (V̇O2max${\dot V_{{{\mathrm{O}}_{\mathrm{2}}}{\mathrm{max}}}}$) or ventilatory thresholds, but, to our knowledge, did not report ...
Forrest Schorderet, Bastien Krumm, Basile Moreillon, Justin Mottet, Antoine Raberin, Nicolas Bourdillon, Raphael Faiss, Grégoire P. Millet   +7 more
wiley   +1 more source

A new method for bedside determination of effective lung volume and functional residual capacity

Experimental Physiology, EarlyView.
Abstract Established methods of measuring functional residual capacity (FRC) involve sophisticated equipment and elaborate procedures. Here we present a new method based on CO2 rebreathing that has a simple fast procedure and only requires end‐tidal CO2 monitoring. Ten healthy subjects with diverse anthropometric and respiratory parameters were studied
Andras Gedeon, Jakob Jansson, David Patrickson, Mats Wallin   +3 more
wiley   +1 more source

A Realistic Technicolor Model from 150 TeV down

, 1992
A realistic technicolor model is presented with the dynamics below $150$ TeV treated explicitly. Electroweak symmetry is broken by the condensates of a `minimal' doublet of technifermions.
Appelquist, Appelquist, Appelquist, Appelquist, Appelquist, Bando, Chivukula, Dimopoulos, Dobado, Eichten, Einhorn, Foot, Georgi, Golden, Hill, Holdom, Holdom, Johnson, Kennedy, Luty, Lynn, Marciano, Miransky, Miransky, Miransky, Miransky, Peskin, Peskin, Peskin, Preskill, Raman Sundrum, Renken, Susskind, Takeuchi, Weinberg, Wyler   +35 more
core   +1 more source

Sex differences in the prefrontal cortex and muscle oxygenation during exercise until exhaustion in endurance‐trained individuals

Experimental Physiology, EarlyView.
Abstract figure legend During cardiopulmonary exercise testing, the decline in oxygenation in the prefrontal cortex of women is striking. This crucial brain area is directly involved in planning motor tasks. The decline is particularly pronounced at higher exercise intensities, especially after reaching the respiratory compensation point or anaerobic ...
Daniel Ramos‐López, Raúl Caulier‐Cisterna, Benjamín Díaz‐Ortiz, Cristóbal Baumann‐Biancani, Kamilo Hunger‐Abbott, Matías Herrera‐Matas, Andrés Vega‐Moraga, Vitor A. Lira, Maximiliano Espinosa‐Ramírez, Karol Ramírez‐Parada, Luigi Gabrielli‐Nervi, Hugo E. Verdejo, Felipe Contreras‐Briceño   +12 more
wiley   +1 more source

Effect of hypoxia on muscle activation at equivalent absolute and relative intensity during incremental and constant load exercise to task failure

Experimental Physiology, EarlyView.
Abstract We examined the impact of moderate hypoxia (HYPO) on muscle activation during incremental exercise matched for both absolute and equivalent relative intensity. Fifteen active subjects (10 males, 5 females) completed two ramp incremental test and two step tests in normoxia (NORM; FiO2${F_{{\mathrm{i}}{{\mathrm{O}}_2}}}$ = 0.209) and HYPO (FiO2${
Dania Ibrahim, Youmna Elsayed Hassanein, Nathan E. Townsend   +2 more
wiley   +1 more source

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

East 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  

The Distribution of Constituent Charm Quarks in the Hadron

, 2001
Using a statistical approach in the framework of non-covariant perturbation theory the distributions for light and charmed quarks in the hadron have been derived, taking into account the mass of the charmed quark.
E. Hoffmann, European Muon Collab., F. I. Olness, F. I. Olness, J. Badier, J. Kuti, K. Boreskov, K. P. Das, L. D. Landau, L. N. Hand, M. A. G. Aivazis, P. Kessler, R. Barbieri, R. Vogt, S. J. Brodsky, T. Sjøstrand, V. G. Kartvelishvili, Yu. A. Golubkov   +17 more
core   +1 more source