Results 41 to 50 of about 119,561 (151)

The Curious Concept That Almost Nobody Seemed to Care About at First: Virtual Particles in the Post‐War Period**

Berichte zur Wissenschaftsgeschichte, EarlyView.
Abstract Short‐lived, unobservable, and not subject to the usual rules of conservation of energy and momentum, virtual particles—an integral part of the conceptual framework of quantum field theory (QFT)—exhibit a number of curious characteristics which, in recent decades, have in part fueled important discussions about their ontological status ...
Jean‐Philippe Martinez
wiley   +1 more source

Machine learning of pair-contact process with diffusion

Scientific Reports, 2022
The pair-contact process with diffusion (PCPD), a generalized model of the ordinary pair-contact process (PCP) without diffusion, exhibits a continuous absorbing phase transition.
Jianmin Shen, Wei Li, Shengfeng Deng, Dian Xu, Shiyang Chen, Feiyi Liu   +5 more
doaj   +1 more source

Human flaws and logical tools in engineering

The Canadian Journal of Chemical Engineering, EarlyView.
Abstract This paper explores the limitations of human cognition, especially in engineering research, emphasizing the need for mathematical models and methods to guide decision‐making and theory validation. While human cognition excels in certain tasks, it is prone to biases that can distort our understanding.
André C. R. Martins
wiley   +1 more source

$${b\rightarrow c\tau \nu }$$ b→cτν transitions in the standard model effective field theory

European Physical Journal C: Particles and Fields, 2019
The $$R(D^{(*)})$$ R(D(∗)) anomalies observed in $$B\rightarrow D^{(*)}\tau \nu $$ B→D(∗)τν decays have attracted much attention in recent years. In this paper, we study the $$B\rightarrow D^{(*)}\tau \nu $$ B→D(∗)τν , $$\Lambda _b\rightarrow \Lambda _c ...
Quan-Yi Hu, Xin-Qiang Li, Ya-Dong Yang
doaj   +1 more source

CP asymmetry in the angular distribution of τ → KS πν τ decays

Journal of High Energy Physics, 2020
In this work, we study the C P asymmetry in the angular distribution of τ → K S πν τ decays, taking into account the known C P violation in K 0 − K ¯ 0 $$ {K}^0-{\overline{K}}^0 $$ mixing. It is pointed out for the first time that, once the well-measured
Feng-Zhi Chen, Xin-Qiang Li, Ya-Dong Yang   +2 more
doaj   +1 more source

Heavy and light quarks in the instanton vacuum [PDF]

, 2011
Assuming the gluon field is well approximated by instanton configurations we derive a light quarks determinant and calculate its contribution to the specific heavy quarks correlators -- namely, the heavy quark propagator and heavy quark-aniquark correlator, receiving the instanton generated light-heavy quarks interaction terms contributions. With these
arxiv   +1 more source

Gauge-Invariant Decomposition of Nucleon Spin and Its Spin-Off [PDF]

Phys.Rev.Lett. 78 (1997) 610-613, 1996
I introduce a gauge invariant decomposition of the nucleon spin into quark helicity, quark orbital, and gluon contributions. The total quark (and hence the quark orbital) contribution is shown to be measurable through virtual Compton scattering in a special kinematic region where single quark scattering dominates. This deeply-virtual Compton scattering
arxiv   +1 more source

Exercise limitations in amyloid cardiomyopathy assessed by cardiopulmonary exercise testing—A multicentre study

ESC Heart Failure, Volume 12, Issue 2, Page 1326-1335, April 2025.
Abstract Aims Amyloid cardiomyopathy is caused by the deposition of light chain (AL) or transthyretin amyloid (ATTR) fibrils, that leads to a restrictive cardiomyopathy, often resulting in heart failure (HF) with preserved or reduced ejection fraction.
Robin Willixhofer, Mauro Contini, Michele Emdin, Damiano Magrì, Alice Bonomi, Elisabetta Salvioni, Fabrizio Celeste, Alberico Del Torto, Claudio Passino, Christophe D.J. Capelle, Chiara Arzilli, Emiliano Fiori, Nicolò Capra, Christina Kronberger, Nikita Ermolaev, Andreas Kammerlander, Beatrice Musumeci, Giuseppe Vergaro, Vincenzo Castiglione, René Rettl, Giacomo Tini, Andrea Baggiano, Iacopo Fabiani, Susanna Sciomer, Roza Badr Eslam, Piergiuseppe Agostoni   +25 more
wiley   +1 more source

Quark-hadron phase transition in a three flavor PNJL model [PDF]

, 2013
We study the quark-hadron phase transition by using a three flavor Nambu-Jona-Lasinio model with the Polyakov loop at zero chemical potential, extending our previous work with two flavor model. We show that the equation of state at low temperatures is dominated by pions and kaons as collective modes of quarks and anti-quarks.
arxiv   +1 more source

Sacubitril/valsartan versus valsartan initiation in patients naïve to renin–angiotensin system inhibitors: Insights from PARAGLIDE‐HF

European Journal of Heart Failure, EarlyView.
Changes in N‐terminal pro‐B‐type natriuretic peptide and assessment of clinical endpoints according to prior exposure to renin–angiotensin system inhibitors in the Pre‐specified substudy of Prospective comparison of ARNI with ARB Given following stabiLization In DEcompensated HFpEF (PARAGLIDE‐HF).
Nina Nouhravesh, Alexander H. Gunn, Derek Cyr, Adrian F. Hernandez, David A. Morrow, Eric J. Velazquez, Jonathan H. Ward, Samiha Sarwat, Kavita Sharma, Kristin M. Williamson, Randall C. Starling, Serge Lepage, Shelley Zieroth, Scott D. Solomon, Robert J. Mentz   +14 more
wiley   +1 more source