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General Relativity and the Tully-Fisher Relation for Rotating Galaxies

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Journal of Modern Physics 2022年第11期13卷 1452-1473页

作者： Yogendra Srivastava Giorgio Immirzi John Swain Orlando Panella Simone Pacetti Emeritus Professor of Physics Northeastern University Boston MA USA dipartimento di Fisica e Geologia Università di Perugia Perugia Italy Retired Dipartimento di Fisica e Geologia Università di Perugia Perugia Italy Physics Department Northeastern University Boston MA USA Istituto Nazionale di Fisica Nucleare INFN Sezione di Perugia Perugia Italy

The flat limit of rotational velocity (vφ) approximately equal to the “edge”-velocity of a galaxy is related to the baryonic mass (MB) via the T-F relationship with n ≈ 4. We explore the connection between mass and the limiting velocity in the framework of general relativity (GR) using the Weyl metric for axially-symmetric galaxies that are supported entirely by their rotational motion. While for small distances from the center, the Newtonian description is accurate as one moves beyond the (baryonic) edge of the galaxy, Lenz’s law and non-linearity of the gravitational field inherent in GR not only lead to a flat velocity (obviating its Keplerian fall), but also provide its tight log-log relationship with the enclosed (baryonic) mass.

关键词： GR Weyl Metric Rotating Galaxies Flat Rotation Curves TF Relation

Combined Environmental and Magnetic Effects on Elementary Matter: A Quantum Field Theory Description of Fermion Epigenetics

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Journal of Modern Physics 2014年第3期5卷 99-102页

作者： Euro Spallucci Claudio Verzegnassi dipartimento di Fisica Sezione Teorica Università di Trieste and INFN Sezione di Trieste Italy

We compute in a theoretical quantum field theory framework the effects that a classic environment will have on an elementary one-fermion state, assumed for simplicity to be that of one electron, in the presence of a magnetic field. We consider its total energy and its spin angular momentum as relevant observables of the state. We show that the changes of these quantities produced by the combined environmental and magnetic effects can be expressed in a simple and compact form. We obtain expressions that only depend on the values of the external environment and magnetic fields, and on the special spin features of the free fermion state. We call these effects “fermion epigenetics” and try to motivate this definition discussing possible relevant analogies with the corresponding medical treatment of epigenetics in organic cells.

关键词： Epigenetics Quantum Field Theory dirac Equation

Chapter 3 Extra-galactic gamma-ray sources

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Chinese Physics C 2022年第3期46卷 63-84页

作者：王祥玉毕效军曹臻 Piero Vallania 吴含荣闫大海袁强 School of Astronomy and Space Sciences Nanjing UniversityNanjing 210093China Key laboratory of Particle Astrophysics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China INAF-Osservatorio Astrofisico di Torino Strada Osservatorio 2010025 Pino Torinese(TO)Italy and INFN Sezione di TorinoVia P.Giuria 110125 TorinoItaly Key laboratory for the Structure and Evolution of Celestial Objects Yunnan ObservatoriesChinese Academy of SciencesKunming 650011China Key laboratory of Dark Matter and Space Astronomy Purple Mountain ObservatoryChinese Academy of SciencesNanjing 210023China

Extra-galactic gammaray sources,such as gamma-ray bursts,active galactic nuclei,starburst galaxies,are interesting and important targets for LHAASO observations.In this chapter,the prospects of detecting these sources with LHAASO and their physical implications are studied.The upgrade plan for the Water Cherenkov Detector Array(WCDA),which aims to enhance the detectability of relatively lower energy photons,is also presented.In addition,a study on constraining the extragalactic background light with LHAASO observation of blazars is presented.

关键词： AGN Gamma-rays GRBs

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Angular Momentum Minimal Magnetization of an Elementary Quantum Fermion System

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Journal of Modern Physics 2013年第5期4卷 638-643页

作者： C. Verzegnassi dipartimento di Fisica Università di Trieste INFN Sezione di Trieste Italy

I consider, in a Quantum Field Theory theoretical approach, the effects of an electromagnetic field on the components of the total angular momentum of an elementary fermion system, assuming the “minimal” form of the relative interaction. When the electromagnetic field can be treated as a classical one, these effects are particularly simple to be computed and exhibit a number of very general characteristic features in the case of a constant magnetic field. A qualitative possible analogy with similar features of an elementary organic system is finally proposed.

关键词： Organic

Molybdenum sputtering film characterization for high gradient accelerating structures

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Chinese Physics C 2013年第9期37卷 73-79页

作者： S.Bini B.Spataro A.Marcelli S.Sarti V.A.Dolgashev S.Tantawi A.D.Yeremian Y.Higashi M.G.Grimaldi L.romano F.Rufno R.Parodi G.Cibin C.Marrelli M.Migliorati C.Caliendo infn - LNF Via E. Fermi 40Frascati (RM) 00044 Italy NSRL University of Science and Technology of China Chinese Academy of Sciences University of Rome-sapienza Dipartimento di FisicaPiazzale Aldo Moro 5Rome 00185Italy SlaC National Accelerator laboratory 2575 Sand Hill RoadMenlo ParkCA 94025USA KEK 1-1 Oho TsukubaIbaraki 305Japan University of Catania Dipartimento di Fisica e Astronomia & MATIS-IMM-CNRVia S. Sofia 64Catania 95123Italy infn-Genova Via Dodecaneso 33Genova 16146Italy diamond Light Source ChiltonDidcotOxford OX110DEUK University of roma-sapienza Dipartimento di Scienze di Base e Applicate per l’IngegneriaVia A. ScarpaRoma 14-00161-Italy Istituto dei Sistemi Complessi ISC-CNRArea della Ricerca di Roma 1Via Salaria km 29.300MonterotondoRome 00040Italy

Technological advancements are strongly required to fulfill the demands of new accelerator devices with the highest accelerating gradients and operation reliability for the future colliders. To this purpose an extensive R^zD regarding molybdenum coatings on copper is in progress. In this contribution we describe chemical composition, deposition quality and resistivity properties of different molybdenum coatings obtained via sputtering. The deposited films are thick metallic disorder layers with different resistivity values above and below the molibdenum dioxide reference value. Chemical and electrical properties of these sputtered coatings have been characterized by Rutherford backscattering, XANES and photoemission spectroscopy. We will also consider multiple cells standing wave section coated by a molybdenum layer designed to improve the performance of X-Band accelerating systems.

关键词： linear accelerator cavities X-band coatings XANES resistivity

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Search for the rare decays W^(+)→D_(s)^(+)γ and Z→D^(0)γ at LHCb

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中国物理C:英文版 2023年第9期47卷 14-26页

作者： R.Aaij A.S.W.Abdelmotteleb C.Abellan Beteta F.Abudinén T.Ackernley B.Adeva M.Adinolfi P.Adlarson H.Afsharnia C.Agapopoulou C.A.Aidala Z.Ajaltouni S.Akar K.Akiba J.Albrecht F.Alessio M.Alexander A.Alfonso Albero Z.Aliouche P.Alvarez Cartelle R.Amalric S.Amato J.L.Amey Y.Amhis L.An L.Anderlini M.Andersson A.Andreianov M.Andreotti D.Andreou D.Ao F.Archilli A.Artamonov M.Artuso E.Aslanides M.Atzeni B.Audurier S.Bachmann M.Bachmayer J.J.Back A.Bailly-reyre P.Baladron Rodriguez V.Balagura W.Baldini J.Baptista de Souza Leite M.Barbetti R.J.Barlow S.Barsuk W.Barter M.Bartolini F.Baryshnikov J.M.Basels G.Bassi B.Batsukh A.Battig A.Bay A.Beck M.Becker F.Bedeschi I.B.Bediaga A.Beiter V.Belavin S.Belin V.Bellee K.Belous I.Belov I.Belyaev G.Benane G.Bencivenni E.Ben-Haim A.Berezhnoy *** *** Andres D.Berninghoff H.C.Bernstein C.Bertella A.Bertolin C.Betancourt F.Betti Ia.Bezshyiko S.Bhasin J.Bhom L.Bian M.S.Bieker N.V.Biesuz S.Bifani P.Billoir A.Biolchini M.Birch F.C.R.Bishop A.Bitadze A.Bizzeti M.P.Blago T.Blake F.Blanc J.E.Blank S.Blusk D.Bobulska J.A.Boelhauve O.Boente Garcia T.Boettcher A.Boldyrev C.S.Bolognani R.Bolzonella N.Bondar F.Borgato S.Borghi M.Borsato J.T.Borsuk S.A.Bouchiba T.J.V.Bowcock A.Boyer C.Bozzi M.J.Bradley S.Braun A.Brea Rodriguez J.Brodzicka A.Brossa Gonzalo J.Brown D.Brundu A.Buonaura L.Buonincontri A.T.Burke C.Burr A.Bursche A.Butkevich J.S.Butter J.Buytaert W.Byczynski S.Cadeddu H.Cai R.Calabrese L.Calefice S.Cali R.Calladine M.Calvi M.Calvo Gomez P.Campana D.H.Campora Perez A.F.Campoverde Quezada S.Capelli L.Capriotti A.Carbone G.Carboni R.Cardinale A.Cardini P.Carniti L.Carus A.Casais Vidal R.Caspary G.Casse M.Cattaneo G.Cavallero V.Cavallini S.Celani J.Cerasoli D.Cervenkov A.J.Chadwick M.G.Chapman M.Charles Ph.Charpentier C.A.Chavez Barajas M.Chefdeville C.Chen S.Chen A.Chernov S.Chernyshenko V.Chobanova S.Cholak M.Chrzaszcz A.Chubykin V.Chulikov P.Ciambrone M.F.Cicala X.Cid Vidal G.Ciezarek G.Ciullo P.E.L.Clarke M.Clemencic H.V.Cliff J.Closier J.L.Cobbledick V.Coco J.A.B.Coelho J.Cogan E.Cognera Centro Brasileiro de Pesquisas Físicas(CBPF) Rio de JaneiroBrazil Universidade Federal do Rio de Janeiro(UFRJ) Rio de JaneiroBrazil Center for High Energy Physics Tsinghua UniversityBeijingChina Institute Of High Energy Physics(IHEP) BeijingChina School of Physics State Key laboratory of Nuclear Physics and Technology Peking UniversityBeijingChina University of Chinese Academy of Sciences BeijingChina Institute of Particle Physics Central China Normal UniversityWuhanHubeiChina Université Savoie Mont Blanc CNRSIN2P3-LAPPAnnecyFrance UniversitéClermont Auvergne CNRS/IN2P3LPCClermont-FerrandFrance Aix Marseille Univ CNRS/IN2P3CPPMMarseilleFrance UniversitéParis-Saclay CNRS/IN2P3IJCLabOrsayFrance laboratoire Leprince-Ringuet CNRS/IN2P3Ecole PolytechniqueInstitut Polytechnique de ParisPalaiseauFrance LPNHE Sorbonne UniversitéParis Diderot Sorbonne Paris CitéCNRS/IN2P3ParisFrance I.Physikalisches Institut RWTH Aachen UniversityAachenGermany Fakultat Physik Technische Universitat DortmundDortmundGermany Max-Planck-Institut für Kernphysik(MPIK) HeidelbergGermany Physikalisches Institut Ruprecht-Karls-Universitat HeidelbergHeidelbergGermany School of Physics University College DublinDublinIreland infn sezione di Bari BariItaly infn sezione di Bologna BolognaItaly infn sezione di Ferrara FerraraItaly infn sezione di Firenze FirenzeItaly infn laboratori Nazionali di Frascati FrascatiItaly infn sezione di Genova GenovaItaly infn sezione di Milano MilanoItaly infn sezione di Milano-Bicocca MilanoItaly infn sezione di Cagliari MonserratoItaly Universitàdegli Studi di Padova Universitàe INFNPadovaPadovaItaly infn sezione di Pisa PisaItaly infn sezione di roma la sapienza RomaItaly infn sezione di roma Tor Vergata RomaItaly Nikhef National Institute for Subatomic Physics AmsterdamNetherlands Nikhef National Institute for Subatomic Physics and VU University Amsterdam AmsterdamNetherlands AGH-University of Science and Technology Faculty of Physics and Applied Computer Scienc

A search for the rare decays W^(+)→D_(s)^(+)γ and Z→D0γis performed using proton-proton collision data collected by the LHCb experiment at a centre-of-mass energy of 13TeV,corresponding to an integrated luminosity of 2.0fb−1.No significant signal is observed for either decay mode and upper limits on their branching fractions are set using W^(+)→D_(s)^(+)γ and Z→μ+μ−decays as normalization channels.The upper limits are 6.5×10^(−4) and 2.1×10^(−3) at 95% confidence level for the W^(+)→D_(s)^(+)γ and Z→D^(0)γ decay modes,respectively.This is the first reported search for the Z→D^(0)γ decay,while the upper limit on the W+→D+sγbranching fraction improves upon the previous best limit.

关键词： W/Z boson rare decay upper limit of branching fraction

A Quantum Field Theory Toy-Model for Magnetic Epigenetic

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Journal of Modern Physics 2013年第8期4卷 1133-1138页

作者： Fabio Burigana Euro Spallucci Claudio Verzegnassi AMEC (Association for Medicine and Complexity) Trieste Italy dipartimento di Fisica Sezione Teorica Università di Trieste and INFN Trieste Italy dipartimento di Fisica Sezione Teorica Università di Trieste and INFN Trieste Udine Italy

We consider the effects that a magnetic field has on the observable properties of an elementary one-fermion state, assumed for simplicity to be that of one electron. We show that for a weak intensity of the field these effects can be very simply computed in a quantum field theory theoretical framework, assuming the minimal form of the electromagnetic interaction and the validity of the dirac equation. The effects proceed via preliminary, magnetic field induced, modification of the four components of the spinor field. These generate consequent modifications of the various observable properties of the fermion, which can always be simply expressed in terms of the four spinor field components. A few general features of the various effects are discussed, and a number of possible analogies with the fascinating medical description of the epigenetic process for an organic cell are finally proposed.

关键词： Epigenetics Quantum Field Theory dirac Equation

Quantal symmetries in the non-linear σ model with Maxwell and non-Abelian Chern-Simons terms

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Chinese Physics C 2010年第5期34卷 535-538页

作者：王珂姜云国霍秋红 Department of Applied Physics Beijing University of Technology Department of Physics University of Pisa infn Sezione di PisaLargo Pontecorvo3.Ed.C56127 PisaItaly College of Materials Science and Engineering Beijing University of Technology

The quantal symmetry property of the CP1 nonlinear σ model with Maxwell non-Abelian ChernSimons terms in(2+1) dimension is studied.In the Coulomb gauge,the system is quantized by using the Faddeev-Senjanovic(FS) path-integral formalism.Based on the quantaum Noether theorem,the quantal conserved angular momentum is derived and the fractional spin at the quantum level in this system is presented.

关键词： non-linear sigma model non-Abelian Chern-Simons fractional spin

Holographic Duals of Quark Gluon Plasmas with Unquenched Flavors

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Communications in Theoretical Physics 2012年第3期57卷 364-386页

作者： Francesco Bigazzi Aldo Cotrone Javier Mas Daniel Mayerson Javier Tarrio dipartimento di Fisica e Astronomia Universita' di Firenze Via G.Sansone 1 I-50019 Sesto Fiorentino (Firenze)Italyand INFNSezione di PisaLargo B.Pontecorvo356127 PisaItaly dipartimento di Fisica Universita' di Torino and INFN Sezione di Torino Via P.Giuria 1 I-10125 TorinoItaly Departamento de F' sica de Part' culas Universidade de Santiago de Compostela and Instituto Galego de F' sica de Altas Enerx' as (IGFAE) E-15782 Santiago de CompostelaSpain Institute for Theoretical Physics University of AmsterdamScience Park 904Postbus 944851090 GL AmsterdamThe Netherlands Institute for Theoretical Physics Universiteit Utrecht3584 CEUtrechtThe Netherlands

We review the construction of gravitational solutions holographically dual to N=1 quiver gauge theories with dynamical flavor multiplets.We focus on the D3-D7 construction and consider the finite temperature,finite quark chemical potential case where there is a charged black hole in the dual solution.discussed physical outputs of the model include its thermodynamics (with susceptibilities) and general hydrodynamic properties.

关键词：夸克胶子等离子体全息口味淬灭水动力性能有限温度带电黑洞化学势

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