C. Becchi

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M.E. Hogan

Wells College

Mrittunjoy Guha Majumdar

Indian Institute of Science

David Seamon

Kansas State University

Sayantan Choudhury

SGT UNIVERSITY GURGAON

Mariafelicia De Laurentis

Università degli Studi di Napoli "Federico II"

Francesca Vidotto

Western University Canada

Antonin Nüsslein

Centre National de la Recherche Scientifique / French National Centre for Scientific Research

Carlo Rovelli

Aix-Marseille University

Nikos Mantzakouras

National & Kapodistrian University of Athens

Dirk K F Meijer

University of Groningen

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Papers by C. Becchi

Nonstandard gauges: A personal point of view

A minimal dimensional approach to the pure Yang-Mills theory in the strong lightcone gauge is con... more A minimal dimensional approach to the pure Yang-Mills theory in the strong lightcone gauge is constructed generalizing a method developed by Speer, Breitenlohner and Maison in the standard, local and covariant, framework. The known results on the ultraviolet renormalizability of the theory are confirmed.

A study of ccc¯c¯ tetraquark decays in 4 muons and in D(⁎)D¯(⁎) at LHC

Physics Letters B

Vanishing of the E2 part of the N∗33 → N + γ amplitude in the non-relativistic quark model of “elementary” particles

Physics Letters

Raymond Stora's obituary

Nuclear Physics B, 2015

Physical and Nonstandard Gauges

Lecture Notes in Physics, 1990

Quark model, additivity and the algebra of the vector charges

Il Nuovo Cimento A, 1968

ABSTRACT

Some remarks on internal symmetry and Lorentz invariance

Physics Letters, 1965

Compact and noncompact gauge theories on a lattice

Physical Review D, 1991

ABSTRACT A noncompact formulation of gauge theories on the lattice recently proposed makes use of... more ABSTRACT A noncompact formulation of gauge theories on the lattice recently proposed makes use of auxiliary fields. We show that in such a formulation the representation of the gauge group in the case of SU(2) is completely reducible, one of the irreducible multiplets containing the Yang-Mills fields plus one auxiliary field. Elimination of this field by a gauge-invariant constraint leads to Wilson&#39;s formulation.

Renormalization of gauge theories: A regularization independent approach

Nuclear Physics B - Proceedings Supplements, 1992

ABSTRACT We analyse the short distance aspects of the renormalization of general class of gauge t... more ABSTRACT We analyse the short distance aspects of the renormalization of general class of gauge theories, including chiral ones. We show that in this regime, independently of the particular procedure employed to subtract the ultra-violet divergences, the identities characterizing the theory, and in particular the Slavnov-Taylor identity, can be recovered order by order by a fine tuning of finite counter-terms if the fermionic content of the theory is chosen so as to avoid the one-loop chiral anomaly. The relevance of this result beyond perturbation theory is shortly discussed.

On the covariant quantization of the free string

Nuclear Physics B, 1988

We discuss a lagrangian approach to the first quantization of the relativistic string. The confor... more We discuss a lagrangian approach to the first quantization of the relativistic string. The conformal properties of the theory are exhibited. We identify the basic fields of the theory, and in particular the Faddeev-Popov ghost fields, as primary conformal fields whose conformal weights are computed.

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Absence of strong interaction corrections to the axial anomaly in the σ model

Communications in Mathematical Physics, 1973

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Current algebra Ward identities in the renormalized σ model

Communications in Mathematical Physics, 1975

The many-current Ward identities corresponding to the Gell-Mann current algebra are discussed in ... more The many-current Ward identities corresponding to the Gell-Mann current algebra are discussed in the renormalized σ model. The Ward identities are verified in the case of the SU(2) x SU(2) chiral symmetry. In the SU(3) x SU(3) case the uniqueness of the Adler-Bardeen anomaly is proved using the Wess-Zumino consistency conditions.

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Slavnov-Taylor and ward identities in the electroweak theory

Theoretical and Mathematical Physics, 2015

In the framework of the Electroweak Theory we discuss a class of gauge fixing choices suitable fo... more In the framework of the Electroweak Theory we discuss a class of gauge fixing choices suitable for the calculation of electromagnetic processes. We show in particular that, with our choices, beyond the basic Slavnov-Taylor identities guaranteeing the independence of the physical results of the particular gauge fixing, one also has the standard QED Ward identities which play a well known crucial role in the calculation of electromagnetic processes and, in particular, in the analysis of the electromagnetic radiative corrections. * Paper written written on the occasion of Andrey Slavnov's seventy fifth birthday

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$Research paper thumbnail of Renormalizability and infrared finiteness of nonlinear $\sigma$-models: a regularization-independent analysis for compact coset spaces$

Renormalizability and infrared finiteness of nonlinear $\sigma$-models: a regularization-independent analysis for compact coset spaces

Communications in Mathematical Physics, 1988

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The renormalization of non-commutative field theories in the limit of large non-commutativity

by C. Becchi and C. Imbimbo

Nuclear Physics B, 2003

We show that renormalized non-commutative scalar field theories do not reduce to their planar sec... more We show that renormalized non-commutative scalar field theories do not reduce to their planar sector in the limit of large noncommutativity. This follows from the fact that the RG equation of the Wilson-Polchinski type which describes the genus zero sector of non-commutative field theories couples generic planar amplitudes with non-planar amplitudes at exceptional values of the external momenta. We prove that the renormalization problem can be consistently restricted to this set of amplitudes. In the resulting renormalized theory non-planar divergences are treated as UV divergences requiring appropriate non-local counterterms. In 4 dimensions the model turns out to have one more relevant (non-planar) coupling than its commutative counterpart. This non-planar coupling is "evanescent": although in the massive (but not in the massless) case its contribution to planar amplitudes vanishes when the floating cut-off equals the renormalization scale, this coupling is needed to make the Wilsonian effective action UV finite at all values of the floating cut-off.

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Measurement of small charges in macroscopic amounts of matter: Discussion of a proposed experiment and description of some preliminary observations

Il Nuovo Cimento, 1965

The increase of endothelial progenitor cells in the peripheral blood: a new parameter for detecting onset and severity of sepsis

International journal of immunopathology and pharmacology

Sepsis is a clinical syndrome characterized by non-specific inflammatory response with evidence o... more Sepsis is a clinical syndrome characterized by non-specific inflammatory response with evidence of profound changes in the function and structure of endothelium. Recent evidence suggests that vascular maintenance, repair and angiogenesis are in part mediated by recruitment from bone marrow (BM) of endothelial progenitor cells (EPCs). In this study we were interested in whether EPCs are increasingly mobilized during sepsis and if this mobilization is associated with sepsis severity. Our flow cytometry data demonstrate that in the CD34+ cell gate the number of EPCs in the blood of patients with sepsis had a four-fold increase (45 +/- 4.5% p < 0.001) compared to healthy controls (12 +/- 3.6%) and that this increase was already evident at 6 hours from diagnosis (40.6 +/- 4.2 percent), reaching its maximum at 72 hours. Also the percentage of cEPCs identified in the patients with sepsis (35 +/- 4.6% of the CD34+ cell) was statistically different (p < 0.001) compared to that found in...

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Mean platelet volume trend in sepsis: is it a useful parameter?

Minerva anestesiologica, 2006

Sepsis, as an uncontrolled generalized inflammatory response, involves also the haemostatic mecha... more Sepsis, as an uncontrolled generalized inflammatory response, involves also the haemostatic mechanisms. Mean platelet volume (MPV) measurement has been available since 1970s, but neither its relationship with platelet count nor the clinical meaning of this relation has been understood in sepsis yet. This study aimed to evaluate both the trend and the relationship between platelet count (PC) and their MPV and to explore their significance in the course of sepsis. Seventy septic patients, were recruited in this prospective study. The PC and MPV were measured repeatedly at the enrollment and, thereafter, whenever patient's sequential organ failure assessment (SOFA) score changed by +/-8% up to 5 samples. Standard correlation test, ANOVA for repeated measures, logistic regression and Wilcoxon test were used. The relationship between PC and MPV, expressed as means and frequency distributions, showed a negative correlation (95% CI; r -0.34; P<0.0001) with an inverse trend during se...

Relation among the Ξ12*, Y1*, N32* Decay Widths in Broken Unitary Symmetry

Physical Review, 1964

ABSTRACT

Connection between BBP and VPP Vertices in the Quark Model

Physical Review, 1966

It is shown that in the quark model it is possible to express the N33* Npi vertex and the rhopipi... more It is shown that in the quark model it is possible to express the N33* Npi vertex and the rhopipi vertex in terms of the axial-vector quark-pion coupling constant. By expressing then this constant in terms of the NNpi coupling constant f, results in fair agreement with the experimental data are obtained for the above vertices. A detailed comparison of

Nonstandard gauges: A personal point of view

A study of ccc¯c¯ tetraquark decays in 4 muons and in D(⁎)D¯(⁎) at LHC

Physics Letters B

Vanishing of the E2 part of the N∗33 → N + γ amplitude in the non-relativistic quark model of “elementary” particles

Physics Letters

Raymond Stora's obituary

Nuclear Physics B, 2015

Physical and Nonstandard Gauges

Lecture Notes in Physics, 1990

Quark model, additivity and the algebra of the vector charges

Il Nuovo Cimento A, 1968

ABSTRACT

Some remarks on internal symmetry and Lorentz invariance

Physics Letters, 1965

Compact and noncompact gauge theories on a lattice

Physical Review D, 1991

Renormalization of gauge theories: A regularization independent approach

Nuclear Physics B - Proceedings Supplements, 1992

On the covariant quantization of the free string

Nuclear Physics B, 1988

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Absence of strong interaction corrections to the axial anomaly in the σ model

Communications in Mathematical Physics, 1973

Download

Current algebra Ward identities in the renormalized σ model

Communications in Mathematical Physics, 1975

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Slavnov-Taylor and ward identities in the electroweak theory

Theoretical and Mathematical Physics, 2015

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$Research paper thumbnail of Renormalizability and infrared finiteness of nonlinear $\sigma$-models: a regularization-independent analysis for compact coset spaces$

Renormalizability and infrared finiteness of nonlinear $\sigma$-models: a regularization-independent analysis for compact coset spaces

Communications in Mathematical Physics, 1988

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The renormalization of non-commutative field theories in the limit of large non-commutativity

by C. Becchi and C. Imbimbo

Nuclear Physics B, 2003

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Measurement of small charges in macroscopic amounts of matter: Discussion of a proposed experiment and description of some preliminary observations

Il Nuovo Cimento, 1965

The increase of endothelial progenitor cells in the peripheral blood: a new parameter for detecting onset and severity of sepsis

International journal of immunopathology and pharmacology

Download