scholarly journals Unifying approaches: derivation of Balitsky hierarchy from the Lipatov effective action

2021 ◽  
Vol 81 (9) ◽  
Author(s):  
S. Bondarenko ◽  
S. Pozdnyakov ◽  
A. Prygarin
Keyword(s):  
Effective Action ◽  
Particle Physics ◽  
Transverse Field ◽  
Quark Propagator ◽  
Calculation Scheme ◽  
Nucl Phys ◽  
C 78 ◽  
D 72 ◽  
The Way

AbstractWe consider a derivation of the hierarchy of correlators of ordered exponentials directly from the Lipatov’s effective action (Lipatov in Nucl Phys B 452:369, 1995; Phys Rep 286:131, 1997; Subnucl Ser 49:131, 2013; Int J Mod Phys Conf Ser 39: 1560082, 2015; Int J Mod Phys A 31(28/29):1645011, 2016; EPJ Web Conf 125: 01010, 2016) formulated in terms of interacting ordered exponentials (Bondarenko and Zubkov in Eur Phys J C 78(8), 617 2018; Bondarenko et al. in Eur Phys J C 81(7):61, 2021). The derivation of the Balitsky equation (Balitsky in Nucl Phys B 463:99, 1996; Phys Rev D 60:014020, 1999; At the frontier of particle physics, vol. 2, p. 1237–1342; Nucl Phys B 629:290, 2002; Phys Rev D 72:074027, 2005) from the hierarchy is discussed as well as the way the sub-leading eikonal corrections to the Balitsky equation arise from the transverse field contribution and sub-leading eikonal corrections to the quark propagator. We outline other possible applications of the proposed calculation scheme.

Analysis and Interpretation of Test Beam Data

2018 ◽  
Author(s):  
Richard Wigmans
Keyword(s):  
Energy Resolution ◽  
Particle Physics ◽  
Particle Beam ◽  
Test Beam ◽  
Term Energy ◽  
The Many ◽  
Physics Experiment ◽  
The Way

This chapter describes some of the many pitfalls that may be encountered when developing the calorimeter system for a particle physics experiment. Several of the examples chosen for this chapter are based on the author’s own experience. Typically, the performance of a new calorimeter is tested in a particle beam provided by an accelerator. The potential pitfalls encountered in correctly assessing this performance both concern the analysis and the interpretation of the data collected in such tests. The analysis should be carried out with unbiased event samples. Several consequences of violating this principle are illustrated with practical examples. For the interpretation of the results, it is very important to realize that the conditions in a testbeam are fundamentally different than in practice. This has consequences for the meaning of the term “energy resolution”. It is shown that the way in which the results of beam tests are quoted may create a misleading impression of the quality of the tested instrument.

On Virtue and Reason: Integrative Theory of De 德 and Aretê

2021 ◽  
Vol 48 (2) ◽  
pp. 170-183
Author(s):  
Chung-ying Cheng
Keyword(s):  
Effective Action ◽  
Confucian Ethics ◽  
Moral Action ◽  
Moral Consciousness ◽  
Self Reflection ◽  
Integrative Theory ◽  
Do So ◽  
The Way

Abstract This article is to argue that virtue is experienced and understood in Confucian ethics as power to act and as performance of a moral action, and that virtue (de 德) as such has to be onto-cosmologically explicated, not just teleologically explained. In other words, it is intended to construct an integrative theory of virtues based on both dao (the Way 道) and de. To do so, we will examine the two features of de, as the power that is derived from self-reflection and self-restraining, and as the motivated action for attaining its practical end in a community. Only by a self-integrated moral consciousness can one’s experience, action and ideal remain in consistency and coherence, which leads us to the Aristotelian notion of virtue as excellence (aretê) and enables us to see how virtue as aretê could be introduced as a second feature of de, namely as the power for effective action in the whole system of virtues, apart from the first feature of de as self-restraining power. We will conclude that reason and virtue are practically united and remain inseparable, and that taking into account the onto-cosmological foundation of virtues, reason and virtue are inevitably the moving and advancing forces for the formation and transformation of human morality just as they are motivating and prompting incentives for individual moral action.

scholarly journals INSTANTON–ANTI-INSTANTON MOLECULE WITH NONZERO MODES OF QUARKS INCLUDED

1999 ◽  
Vol 14 (02) ◽  
pp. 241-252 ◽  
Author(s):  
A. G. ZUBKOV ◽  
O. V. DUBASOV ◽  
B. O. KERBIKOV
Keyword(s):  
Phase Transition ◽  
Effective Action ◽  
Correlation Functions ◽  
Light Quark ◽  
Quark Propagator ◽  
Chiral Phase ◽  
Chiral Phase Transition

A straightforward algebraic derivation is carried out of light quark propagator and effective action in the instanton–anti-instanton molecule. Exact expressions are obtained which contain contributions of all quark modes. Possible implications of the results include chiral phase transition and correlation functions of mesons and baryons.

On the way from Sakatons to quarks

2015 ◽  
Vol 30 (01) ◽  
pp. 1530008
Author(s):  
L. B. Okun
Keyword(s):  
Particle Physics ◽  
The Way

This is my contribution to "50 Years of Quarks" written on the invitation from Prof. K. K. Phua and Prof. Harald Fritzsch to the 50th Jubilee of the discovery of quarks. It consists of two parts. In the first part I describe chronologically personal recollections from the years 1956–1980. The second part contains excerpts from my book "Particle Physics: The Quest for the Substance of Substance" published in 1985.

scholarly journals Special Issue ”Instruments and Methods for Cyclotron Produced Radioisotopes”

Instruments ◽  
2019 ◽  
Vol 3 (4) ◽  
pp. 60
Author(s):  
Saverio Braccini ◽  
Francisco Alves
Keyword(s):  
Nuclear Medicine ◽  
Personalized Medicine ◽  
Crucial Role ◽  
Particle Physics ◽  
Radioisotope Production ◽  
Science And Society ◽  
Special Issue ◽  
And Personalized Medicine ◽  
Diagnostics And Therapy ◽  
The Way

The 17th Workshop on Targets and Target Chemistry (WTTC17) was held in Coimbra (Portugal) on 27–31 August 2018. A few months before, the 13th Workshop of the European Cyclotron Network (CYCLEUR) took place in Lisbon (Portugal) on 23–24 November 2017. These two events reassembled major experts in the field of radioisotope production, targets, target chemistry and cyclotrons. In the last few years, significant advances have been obtained in these fields with direct implications for science and society. Instruments and methods, originally developed for nuclear and particle physics, played a crucial role and remarkable developments are on-going. The production of novel radioisotopes for both diagnostics and therapy is expected to produce a breakthrough in nuclear medicine in the next years, paving the way towards theranostics and personalized medicine. This Special Issue presents a collection of original scientific contributions on the latest developments on instruments and methods for medical and research cyclotrons as well as on target and target chemistry for the production of radioisotopes.

Labs, Lives, Technoscience

2021 ◽  
pp. 19-36
Author(s):  
Talia Dan-Cohen
Keyword(s):  
Synthetic Biology ◽  
Particle Physics ◽  
First Generation ◽  
Community Stability ◽  
Successful Career ◽  
Physics Community ◽  
Synthetic Organisms ◽  
Made In ◽  
Experimental Particle ◽  
The Way

This chapter looks at Sharon Traweek's classic study of physicists, which tracks the way the experimental particle physics community reproduces itself through the training of novices. It identifies the patterns through which education and inculcation occur, and by which particle physicists learn the criteria for a successful career. It also examines the images Traweek conveys of community, stability, and gendered reproduction that can be discerned only within a sufficiently entrenched discipline. The chapter describes synthetic biology as an unstable and ambiguously bounded field in which idiosyncratic individual paths are figured prominently, especially for members of the first generation of practitioners whose training took place within the reproductive mechanisms of established disciplines. It explores paths that are embedded with different concepts and logics within the synthetic organisms that were made in different labs.

scholarly journals A Review of X-ray Microcalorimeters Based on Superconducting Transition Edge Sensors for Astrophysics and Particle Physics

2021 ◽  
Vol 11 (9) ◽  
pp. 3793
Author(s):  
Luciano Gottardi ◽  
Kenichiro Nagayashi
Keyword(s):  
Low Temperature ◽  
Energy Resolution ◽  
Particle Physics ◽  
State Of The Art ◽  
Transition Edge Sensors ◽  
The State ◽  
Superconducting Transition ◽  
X Ray ◽  
Transition Edge ◽  
The Way

The state-of-the-art technology of X-ray microcalorimeters based on superconducting transition-edge sensors (TESs), for applications in astrophysics and particle physics, is reviewed. We will show the advance in understanding the detector physics and describe the recent breakthroughs in the TES design that are opening the way towards the fabrication and the read-out of very large arrays of pixels with unprecedented energy resolution. The most challenging low temperature instruments for space- and ground-base experiments will be described.

A class of inflaton potentials from RG analysis of scalar-gravity interaction

2014 ◽  
Vol 11 (02) ◽  
pp. 1460008
Author(s):  
Artur R. Pietrykowski
Keyword(s):  
Renormalization Group ◽  
Scalar Field ◽  
Observational Data ◽  
Particle Physics ◽  
Field System ◽  
Group Methods ◽  
Renormalization Group Methods ◽  
Scalar Gravity ◽  
Inflationary Models ◽  
The Way

Inflationary models are characterized by the form of a potential which is arbitrary and usually parametrized so as to match the observational data. However, making use of the renormalization group methods to a gravity-scalar field system it is possible to find physically nontrivial potentials that might be relevant for cosmology and particle physics as well. I will pinpoint the way this class of potentials may be found as well as discuss their utility for inflationary models.

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