DOCSLIB.ORG

Some Aspects of Particle Physics in Thermal Background

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Some Aspects of Particle Physics in Thermal Background SOME ASPECTS OF PARTICLE PHYSICS IN THERMAL BACKGROUND THESIS SUBMITTED TO JADAVPUR UNIVERSITY FOR THE DEGREE OF DOCTOR OF PHILOSOPHY (SCIENCE) arXiv:hep-ph/0205110v1 11 May 2002 By INDRAJIT MITRA THEORY GROUP SAHA INSTITUTE OF NUCLEAR PHYSICS KOLKATA 2002 ACKNOWLEDGMENTS I am indebted to Prof. Palash Baran Pal for guidance, encouragement, collaboration and numerous stimulating discussions. I am also grateful to Prof. Jos´eF. Nieves for collaboration and many valuable discussions via e-mail. Interactions with many other members, both past and present, of the Theory Group of SINP, including Dr. Ananda DasGupta, Prof. Asit K. De, Prof. Binayak Dutta-Roy, Dr. Abhee K. Dutt-Mazumder, Prof. A. Harindranath and Prof. Samir Mallik, have helped me learn quantum field theory and thermal field theory. I thank them all. I express my gratitude to all members of the Theory Group for their help and cooper- ation. The Research Fellows, in particular, have helped me in every possible way during my stay here. Last, but not the least, I thank my mother for her support and understanding, without which this work could not have been done. ii TABLE OF CONTENTS Page Acknowledgments..................................... ii ListofFigures ...................................... vi Chapters: 1. Introduction..................................... 1 1.1 Importance of particle physics in thermal background . .... 1 1.2 The problems considered in this thesis and their motivations . .. 2 1.3 Outlineofthethesis ............................. 5 1.4 Somenotationsandconventions. 6 2. Thermalfieldtheory ................................ 7 2.1 Introduction ................................. 7 2.2 Thermodynamic equilibrium . 7 2.3 Time-orderedthermalpropagators . 10 2.3.1 Scalarfield .............................. 10 2.3.2 Fermionfield ............................. 12 2.3.3 Photonfield.............................. 14 2.4 Additionalvertexandpropagators . 15 3. Linearizedtheoryofgravity ........................... 17 3.1 Introduction ................................. 17 3.2 Graviton ................................... 18 3.3 Photonsincurvedspace ........................... 22 3.4 Spinorsincurvedspace ........................... 23 3.5 Interactionvertices.............................. 28 3.5.1 Photon-photon-gravitonvertex . 29 3.5.2 Fermion-fermion-gravitonvertex . 30 iii 3.5.3 Fermion-fermion-photon-graviton vertex . 32 3.5.4 Importantfeaturesofthevertexfactors . 33 4. ChargedleptonsinthermalQED . 35 4.1 Dispersion relation and inertial mass . 35 4.2 Spinor and wavefunction renormalization factor . .. 39 4.3 Effectofchargeconjugationinvariance . 43 4.4 Relations when background is not C invariant............... 47 4.5 Calculations at O(e2)............................. 48 4.5.1 Self-energy .............................. 48 4.5.2 Calculation of inertial mass . 51 4.5.3 Calculation of wavefunction renormalization factor . 53 5. Gravitational couplings of charged leptons in a medium . .... 55 5.1 Introduction ................................. 55 5.2 Gravitationalmass .............................. 55 5.3 Operational definition at O(e2) ....................... 59 5.4 Gravitationalvertex ............................. 62 5.4.1 Irreduciblediagrams ......................... 62 5.4.2 Bubble diagrams given in Fig. 5.1 . 64 5.4.3 Tadpole diagrams given in Fig. 5.2 . 66 5.4.4 Additionalremarks.......................... 69 5.5 Calculation of the gravitational mass . 70 5.5.1 Terms with the photon distribution from Fig. 5.1 . 70 5.5.2 Terms with the electron distribution from Fig. 5.1 . 72 5.5.3 TermsfromFig.5.2 ......................... 74 5.5.4 Summary ............................... 75 5.6 Resultsforparticularcases . .. .. .. 76 5.6.1 Classical electron gas and classical proton gas . 77 5.6.2 Degenerate electron gas and classical proton gas . 80 6. Someaspectsofhigh-temperatureQED . ... 83 6.1 Introduction ................................. 83 6.2 One-loop electron self-energy in a general linear covariant gauge..... 84 6.3 Equation governing gauge dependence of dispersion relation at one loop, andgeneralconsiderations. 88 6.4 Gauge independence of one-loop dispersion relation at momenta much larger than eT ................................ 89 6.5 Gauge independence of effective mass at one-loop . .. 91 6.5.1 Subtletiesatzeromomentum . 91 6.5.2 Formulafortheeffectivemass. 91 iv 6.5.3 Investigationofgaugeindependence . 93 7. Conclusions ..................................... 96 Appendices: A. Field quantization using discrete momenta . .. 99 B. Full propagator and wavefunction renormalization factor in vacuum . .101 C. Charge conjugation and the 1PI gravitational vertex . .......104 D. Transversalityofthegravitationalvertex . ......107 E. Apparently ill-defined contributions to the gravitational vertex .........111 E.1 TheB1contribution .............................111 E.2 TheA2contribution .............................114 E.3 TheXcontribution..............................117 E.4 Alternative evaluation of the B1 and A2 contributions . 119 F. Thermal contribution to the equation for the effective mass at high temperature123 Bibliography .......................................126 ListofPublications....................................130 v LIST OF FIGURES Figure Page ′ 3.1 Feynman rule for the coupling of the photon with the graviton. Cµνλρ(k,k ) isgiveninEq.(3.79). ............................. 29 ′ 3.2 Feynman rule for the tree-level gravitational vertex of a fermion. Vλρ(p,p ) isgiveninEq.(3.95). ............................. 32 3.3 Diagrams of O(eκ) with two fermions, one photon and one graviton in the external lines. These are the tree-level diagrams for the photoproduction ofgravitonsoffelectrons. .. .. .. 33 4.1 One-loop diagrams for the self-energy of a charged lepton ℓ in a medium. .. 48 5.1 Bubble diagrams for the one-loop gravitational vertex of charged leptons. These diagrams contribute in a background of photons and electrons. The braided line represents the graviton. ...................... 63 5.2 Tadpole diagrams for the one-loop gravitational vertex of charged leptons. These diagrams contribute to the vertex of any charged lepton in a background of electrons and nucleons. ........................... 63 5.3 The one-loop diagrams that contribute to order κ to the photon tadpole in a medium, in the presence of a static and homogeneous (q = 0) gravitational potential. The fermion loop involves a sum over all the species of fermions present in the medium. 67 vi CHAPTER 1 Introduction 1.1 Importance of particle physics in thermal background The study of elementary particles in vacuum is based on quantum field theory. How- ever, there are situations in which it is necessary to consider these particles in a non-trivial background consisting of a large number of particles at finite temperature and/or density. Such temperatures and densities of significance occur in stellar interiors and were also present in the early universe. Another relevant situation occurs in the laboratory during heavy-ion collisions. The formalism needed for the study of these situations is provided by thermal field theory, also known as finite temperature field theory [1, 2, 3]. From a theoretical point of view (as we will see in the course of the present work), two major features are induced by the background medium. These are the occurrence of an additional four-vector in the form of the four-velocity of the medium, and the breaking of discrete symmetries like C, P and T even when the underlying Lagrangian respects these symmetries. As a result, self-energies, vertex functions and other Green’s functions involve new tensor structures and associated form factors, together with a relaxation of some of the constraints restricting the form factors. A third important feature induced by the medium (also to be encountered in the present work) is the breaking of flavour symmetry. All these features give rise to rich physics which was absent in the vacuum. A modified self-energy, for example, gives rise to modification of the dispersion relation (energy-momentum relation). This, in turn, among other things, can open up the phase space, and allow processes which were kinematically forbidden in the vacuum to take place in the medium. Let us now turn to some specific illustrations of changes in the properties of elementary particles due to a thermal background. Gauge symmetry spontaneously broken in vacuum can be restored by finite temperature corrections. The masses of the fermions and gauge 1 bosons of the Standard Model vanish when this happens [4]. In the phase of restored chiral invariance, one finds the generation of thermal effective masses of the particles, different effective masses of left-handed and right-handed leptons, and different dispersion relations of transverse and longitudinal modes of gauge bosons [5, 6]. Modification of photon dispersion relations leads to Cerenkov radiation (emission of a photon) by even a single neutrino in a medium [7]. The dispersion relation of neutrinos become flavour dependent in a medium containing electrons but not the other charged leptons [8, 9]. In such a flavor asymmetric background, the electromagnetic [10] and gravitational [11] interactions of the neutrinos in response to external fields are also flavor dependent, while the radiative decay of a massive neutrino is strongly enhanced compared to the decay in vacuum (as the leptonic GIM mechanism becomes inoperative) [12]. When neutrinos travel in a background of electrons with a static external magnetic field also present, the latter causes an
Load more

Recommended publications
  • Academic Report ( 2018–19 )
    Academic Report ( 2018–19 ) Harish - Chandra Research Institute Chhatnag Road, Jhunsi Prayagraj (Allahabad), India 211019 Contents 1. About the Institute 2 2. Director’s Report 4 3. List of Governing Council Members 5 4. Staff list 6 5. Academic Report - Mathematics 15 6. Academic Report - Physics 100 7. HRI Colloquia 219 8. Mathematics Talks and Seminars 220 9. Physics Talks and Seminars 222 10. Recent Graduates 226 11. Publications 227 12. Preprints 236 13. About the Computer Section 242 14. Library 244 15. Construction Activity 247 1 About The Institute History: The Harish-Chandra Research Institute is one of the premier research in- stitutes in the country. It is an autonomous institution fully funded by the Department of Atomic Energy (DAE), Government of India. The Institute was founded as the Mehta Research Institute of Mathematics and Mathematical Physics (MRI). On 10th Oct 2000 the Institute was renamed as Harish-Chandra Research Institute (HRI) after the acclaimed mathematician, the late Prof Harish-Chandra. MRI started with the efforts of Dr. B. N. Prasad, a mathematician at the University of Allahabad, with initial support from the B. S. Mehta Trust, Kolkata. Dr. Prasad was succeeded in January 1966 by Dr. S. R. Sinha, also of Allahabad University. He was followed by Prof. P. L. Bhatnagar as the first formal Director. After an interim period, in January 1983 Prof. S. S. Shrikhande joined as the next Director of the Institute. During his tenure the dialogue with the DAE entered into decisive stage and a review committee was constituted by the DAE to examine the Institute’s future.
    [Show full text]
  • Study of Hot and Dense Nuclear Matter in Effective QCD Model
    Study of hot and dense nuclear matter in effective QCD model By CH. AMINUL ISLAM PHYS05201004001 Saha Institute of Nuclear Physics A thesis submitted to the Board of Studies in Physical Sciences In partial fulfillment of requirements For the Degree of DOCTOR OF PHILOSOPHY of HOMI BHABHA NATIONAL INSTITUTE arXiv:1609.08884v2 [hep-ph] 5 Jan 2017 August, 2016 Homi Bhabha National Institute1 Recommendations of the Viva Voce Committee As members of the Viva Voce Committee, we certify that we have read the disser- tation prepared by CH. AMINUL ISLAM entitled Study of hot and dense nuclear matter in effective QCD model and recommend that it maybe accepted as fulfilling the dissertation requirement for the Degree of Doctor of Philosophy. Date: Chair - Prof. Asit Kumar De Date: Guide/Convener - Prof. Munshi Golam Mustafa Date: Member 1 - Prof. Palash Baran Pal Date: Member 2 - Prof. Debades Bandyopadhyay Date: External Examiner - Prof. Hiranmaya Mishra Final approval and acceptance of this dissertation is contingent upon the can- didate's submission of the final copies of the dissertation to HBNI. I hereby certify that I have read this dissertation prepared under my direction and recommend that it may be accepted as fulfilling the dissertation requirement. Date: Place: Guide: Prof. Munshi Golam Mustafa 1This page is to be included only for final submission after successful completion of viva voce. i ii STATEMENT BY AUTHOR This dissertation has been submitted in partial fulfillment of requirements for an advanced degree at Homi Bhabha National Institute (HBNI) and is deposited in the Library to be made available to borrowers under rules of the HBNI.
    [Show full text]
  • At the Root of Things
    At the Root of Things The Subatomic World K20506_FM.indd 1 7/10/14 2:38 AM This page intentionally left blank At the Root of Things The Subatomic World Palash B. Pal Saha Institute of Nuclear Physics Calcutta, India Translated from Bengali by Sushan Konar K20506_FM.indd 3 7/10/14 2:38 AM CRC Press Taylor & Francis Group 6000 Broken Sound Parkway NW, Suite 300 Boca Raton, FL 33487-2742 © 2015 by Taylor & Francis Group, LLC CRC Press is an imprint of Taylor & Francis Group, an Informa business No claim to original U.S. Government works Version Date: 20140623 International Standard Book Number-13: 978-1-4665-9130-1 (eBook - PDF) This book contains information obtained from authentic and highly regarded sources. Reasonable efforts have been made to publish reliable data and information, but the author and publisher cannot assume responsibility for the validity of all materials or the consequences of their use. The authors and publishers have attempted to trace the copyright holders of all material reproduced in this publication and apologize to copyright holders if permission to publish in this form has not been obtained. If any copyright material has not been acknowledged please write and let us know so we may rectify in any future reprint. Except as permitted under U.S. Copyright Law, no part of this book may be reprinted, reproduced, transmitted, or utilized in any form by any electronic, mechanical, or other means, now known or hereafter invented, including photocopying, microfilming, and recording, or in any information stor- age or retrieval system, without written permission from the publishers.
    [Show full text]
  • Annual Report 2014-2015
    ANNUAL REPORT 2 0 1 4 - 2 0 1 5 INDIAN INSTITUTE OF SCIENCE EDUCATION AND RESEARCH KOLKATA Prepared by Annual Report Committee 2014-2015 Buddhananda Banerjee Bhaswati Bhowmik Kajaljyoti Borah Suraj N Bordoloi Robert J Chandran Surashree Datta Golam M. Hossain Siladitya Jana Satyabrata Raj Amlan K. Roy Partho Sarothi Ray (Convenor) Published by the Director IISER Kolkata Preface 04 1. The IISER Kolkata Community 09 1.1 Staff Members 10 1.2 Achievements of Staff Members 20 1.3 Administration Members 21 1.4 Student Achievements 21 1.5 Institute Achievements 23 2. Administrative Report 25 3. Research & Teaching 29 3.1 Activities 30 3.1.1 Department of Biological Sciences 30 3.1.2 Department of Chemical Sciences 32 3.1.3 Department of Earth Sciences 35 3.1.4 Department of Mathematics and Statistics 38 3.1.5 Department of Physical Sciences 40 3.1.6 Center of Excellence in Space Sciences India (CESSI) 42 3.2 Research and Development Activities 44 3.3 Sponsored Research 45 3.4 Equipment Procured 62 3.5 Library 65 3.6 Student Enrolment 66 3.7 Graduating Students 67 CONTENTS 4. Seminars & Colloquia 73 4.1 Department of Biological Sciences 74 4.2 Department of Chemical Sciences 76 4.3 Department of Earth Sciences 79 4.4 Department of Mathematics and Statistics 82 4.5 Department of Physical Sciences 84 4.6 Center of Excellence in Space Sciences 88 5. Publications 91 5.1 Publications of Faculty Members 92 5.1.1 Department of Biological Sciences 92 5.1.2 Department of Chemical Sciences 95 5.1.3 Department of Earth Sciences 103 5.1.4 Department of Mathematics and Statistics 104 5.1.5 Department of Physical Sciences 105 5.2 Student Publications 112 5.3 Staff Publications 113 6.
    [Show full text]
  • Meghnad Saha: a Brief History 1 Ajoy Ghatak
    A Publication of The National Academy of Sciences India (NASI) Publisher’s note Every possible eff ort has been made to ensure that the information contained in this book is accurate at the time of going to press, and the publisher and authors cannot accept responsibility for any errors or omissions, however caused. No responsibility for loss or damage occasioned to any person acting, or refraining from action, as a result of the material in this publication can be accepted by the editors, the publisher or the authors. Every eff ort has been made to trace the owners of copyright material used in this book. Th e authors and the publisher will be grateful for any omission brought to their notice for acknowledgement in the future editions of the book. Copyright © Ajoy Ghatak and Anirban Pathak All rights reserved. No part of this book may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recorded or otherwise, without the written permission of the editors. First Published 2019 Viva Books Private Limited • 4737/23, Ansari Road, Daryaganj, New Delhi 110 002 Tel. 011-42242200, 23258325, 23283121, Email: [email protected] • 76, Service Industries, Shirvane, Sector 1, Nerul, Navi Mumbai 400 706 Tel. 022-27721273, 27721274, Email: [email protected] • Megh Tower, Old No. 307, New No. 165, Poonamallee High Road, Maduravoyal, Chennai 600 095 Tel. 044-23780991, 23780992, 23780994, Email: [email protected] • B-103, Jindal Towers, 21/1A/3 Darga Road, Kolkata 700 017 Tel. 033-22816713, Email: [email protected] • 194, First Floor, Subbarama Chetty Road Near Nettkallappa Circle, Basavanagudi, Bengaluru 560 004 Tel.
    [Show full text]
  • Science in the Path of Syncretism**
    Indian Journal of History of Science, 46.1 (2011) 109-130 SCIENCE IN THE PATH OF SYNCRETISM** ARUN KUMAR BISWAS* (Received 20 September 2010) Joseph Needham, the famous historian of science, has recommended syncretism of the positive elements with healthy secular knowledge systems in human civilization such as Science, Spirituality and Socialism or Sâmya etc. The apparent conflict between Science and Religion has arisen since the latter has been mis-represented by dogmatic theology. This paper deals with the conflict between medieval science and theology, the true domains of science and religion, the movement of Syncretism within the conventional domain of Science, and finally the exciting new field of Syncretism in the multi-disciplinary Consciousness Studies. Key words: Conflict, Consciousness, Matter, Non-Matter, Objectivity, Religion, Science, Secularism, Socialism, Spirituality, Subjectivity, Syncretism, Theology. Religion has two distinct components: the rose of spirituality and the thorn of theology. Dogmatic Theology is definitely ‘evil’(if one adopts the definition provided by Aldous Huxley), since it is exclusive and separatist in character and thwarts the growth of not only genuine spirituality but also of the open-minded, healthy secular knowledge systems such as science, music, sculpture, and painting, freedom of expression, new innovations and social doctrines. The secular knowledge–systems are often ethically neutral, non-spiritual, but not necessarily anti-spiritual or ‘evil’ (like dogmatic theology). Much of the secular traditions are ‘good’ and even necessary for the sustenance and healthy growth of human civilization, spirituality and syncretism. Crucial for the evolution and growth of syncretism, we endorse not only the most important concept of ‘Spirituality’ but also at least two other broad thought-systems : science including technology and (spiritual) socialism or sâmya.
    [Show full text]
  • U.G. Syllabus for Physics (Honours) Techno India University, 2019
    U.G. Syllabus for Physics (Honours) Techno India University, 2019 Scheme of CBCS Curriculum 1.1. Basic Courses Types under CBCS In CBCS there are some basic types of courses. The ones that are relevant to the B.Sc. curricula have been described below. 1. Core Course (CC): A discipline specific compulsory basic course. 2. Discipline Specific Elective Course (DSE): A discipline specific elective course which is more advanced or specialized. 3. Generic Elective Course (GE): An inter-disciplinary elective course to be opted from a discipline other than ones main discipline(s) of choice(e.g., a course in a discipline other than in which honours has been taken). 4. Skill Enhancement Course (SEC): A discipline specific elective skill enhancement course. 5. Ability Enhancement Compulsory Course (AECC): These are compulsory courses. There are two of them. AECC-1 is Communicative English / Modern Indian Language (e.g.:Bengali, Urdu, Hindi.) & AECC-2 is Environmental Science. 1.2. Credit Structure In CBCS, all courses have credits assigned to them. For any course, one of the following three modes teaching will be used: 1. Theory + Practical 2. Theory + Tutorial 3. Theory only The credit structure is described below: Theory + Practical Theory + Tutorial Theory Theory Practical Theory Tutorial Theory CC 4 3 5 2 DSE 4 3 5 2 GE 4 2 5 1 SEC 2 AECC 2 Table-1 Class Assignments: The class assignment for different course segments (theory, practical, tutorial) are as follows: • Theory: 1 credit = 1 hour / week • Practical: 1 credit = 2 hours / week • Tutorial: 1 credit = 1 hour / week Duration of the Semesters: The semesters will comprise 15 to 18 weeks of direct teaching.
    [Show full text]
  • Indian Institute of Astrophysics
    INDIAN INSTITUTE OF ASTROPHYSICS ACADEMIC REPORT 2006–07 EDITED BY : S. K. SAHA EDITORIAL ASSISTANCE : SANDRA RAJIVA Front Cover : High Altitude Gamma Ray (HAGAR) Telescope Array Back Cover (outer) : A collage of various telescopes at IIA field stations Back Cover (inner) : Participants of the second in-house meeting held at IIA, Bangalore Printed at : Vykat Prints Pvt. Ltd., Airport Road Cross, Bangalore 560 017 CONTENTS Governing Council 4. Experimental Astronomy 35 Honorary Fellows 4.1 High resolution astronomy 35 The year in review 4.2 Space astronomy 36 1. Sun and solar systems 1 4.3 Laboratory physics 37 1.1 Solar physics 1 5. Telescopes and Observatories 39 1.2 Solar radio astronomy 8 5.1 Kodaikanal Observatory 39 1.3 Planetary sciences 9 5.2 Vainu Bappu Observatory, Kavalur 39 1.4 Solar-terrestrial relationship 10 5.3 Indian Astronomical Observatory, 2. Stellar and Galactic Astronomy 12 Hanle 40 2.1 Star formation 12 5.4 CREST, Hosakote 43 2.2 Young stellar objects 12 5.5 Radio Telescope, Gauribidanur 43 2.3 Hydrogen deficient stars 13 6. Activities at the Bangalore Campus 45 2.4 Fluorine in evolved stars 14 6.1 Electronics laboratory 45 2.5 Stellar parameters 15 6.2 Photonics laboratory 46 2.6 Cepheids 15 6.3 Mechanical engineering division 47 2.7 Metal-poor stars 16 6.4 Civil engineering division 47 2.8 Stellar survey 16 6.5 Computer centre 47 2.9 Binary system 17 6.6 Library 47 2.10 Star cluster 17 7. Board of Graduate Studies 49 2.11 ISM 18 8.
    [Show full text]
  • Statement on the Proposed Citizenship Amendment Bill We Are
    Statement on the Proposed Citizenship Amendment Bill We are a group of Indian scientists and scholars. We are issuing this statement in our personal capacity as concerned citizens to express our dismay at the reported plans to table the Citizenship Amendment Bill 2019 in the parliament. We do not have access to the exact text of the current version of the Bill. Our statement is based on media reports and the text of the previous version of the Bill that was passed by the Lok Sabha in January 2019. Nevertheless, we feel compelled to issue this statement already at this point of time in view of the reports that the Bill may be tabled in parliament early next week and may be taken up for voting in both houses soon after. We understand that the Bill seeks to grant citizenship to Hindus, Sikhs, Buddhists, Jains, Parsis and Christians from Afghanistan, Bangladesh and Pakistan. The stated intent of the Bill is to provide refuge to persecuted minorities from neighbouring countries. While we support this laudable objective, we find it deeply troubling that the Bill uses religion as a legal criterion for determining Indian citizenship. The idea of India that emerged from the independence movement, and as enshrined in our constitution, is that of a country that aspires to treat people of all faiths equally. The use of religion as a criterion for citizenship in the proposed bill would mark a radical break with this history and would be inconsistent with the basic structure of the constitution. We fear, in particular, that the careful exclusion of Muslims from the ambit of the Bill will greatly strain the pluralistic fabric of the country.
    [Show full text]
  • The Review Committee "Theoretical Physics Including Mathematics"
    The Review Committee for the subject area "Theoretical Physics including Mathematics" Members : 1. Prof. Luis Alvarez-Gaume, CERN, Geneva, Switzerland. 2. Prof. Emmanuel Paschos, Technical University, Dortmund, Germany. 3. Prof. Sudhendu Rai Choudhury, IISER, Bhopal, India. 4. Prof. Sanjay Reddy, Los Alamos National Laboratory, Los Alamos, USA. 5. Prof. Subir Sarkar, University of Oxford, Oxford, UK. 6. Prof. Ryu Sasaki, Kyoto University, Kyoto, Japan. 7. Prof. Virendra Singh, TIFR, Mumbai, India. 8. Prof. Peter Weisz, Max Planck Institute of Physics, Munich, Germany. 13-14 December, 2010 SAHA INSTITUTE OF NUCLEAR PHYSICS 1/AF, Bidhannagar, Kolkata 700064 THEORY DIVISION Members (2007-till date) Faculty Technical/Adm./Auxiliary Kar, Kamales (Head) Sr. Prof. H Mitra, Pradyut Kumar Technician Ghosh, Gautam Sr. Prof. H Hazra, Sudarshan Technician Harindranath, A. Sr. Prof. H Mallick, Dola Superintendent Kundu, Anjan Sr. Prof. H Bose, Arun Kumar Helper Mitra, Parthasarathi Sr. Prof. H Pal, Palash Baran Sr. Prof. H Shyam, Radhey Sr. Prof. H Bhattacharyya, Gautam Prof. G Postdocs De, Asit Prof. G Gupta, Sonika Roy, Rajarshi* Gupta, Kumar Sankar Prof. G Majhi, Swapan Sinha, Monika* Mustafa, Munshi Golam Prof. G Naskar, Tapan Sur, Sourav* Roy, Tarun Kanti Prof. G Roy, Shibaji Prof. G Agrawal, Bijay Prof. F Basu-Mallick, Bireswar Prof. F Special academic members Ghosh, Amit Prof. F Das, Ashok Adjunct Prof. Mathews, Prakash Prof. F De, Jadu Nath Emeritus Mukhopadhyay, Debabrata Prof. F Mallik, Samirnath Emeritus Singh, Harvendra Prof. F Samaddar,
    [Show full text]
  • Beyond the Standard Model: Some Aspects of Supersymmetry And
    Beyond The Standard Model: Some Aspects of Supersymmetry and Extra Dimension Thesis Submitted to The University of Calcutta for The Degree of Doctor of Philosophy (Science) By Tirtha Sankar Ray Theory Division, Saha Institute of Nuclear Physics, 1/AF Bidhan Nagar, Kolkata 700 064, India arXiv:1103.5939v1 [hep-ph] 30 Mar 2011 Under the supervision of Prof. Gautam Bhattacharyya Theory Division, Saha Institute of Nuclear Physics, India 2010 ACKNOWLEDGMENTS I gratefully acknowledge the academic and personal support received from my supervisor Prof. Gau- tam Bhattacharyya. He has been the friend, philosopher and guide, in its truest sense. I thank him for the infinite patience, with which he discussed and addressed all my problems in physics and be- yond. I shall remain indebted to Prof. Amitava Raychaudhuri and Prof. Palash Baran Pal from whom I learned the basics of particle physics and received vital guidance, that navigated me through the labyrinth of my early research life. I also thank Prof. Probir Roy for his encouragement and guidance. It is my great pleasure to thank Prof. Tapan Kumar Das, Prof. Subinay Dasgupta and Prof. Anirban Kundu from the University of Calcutta and Prof. Partha Majumdar, Prof. Pijushpani Bhattacharjee and Prof. Kamalesh Kar from Saha Institute of Nuclear Physics for their encouragement and support at different stages of my PhD work. I thank Prof. Stephane Lavignac of IPhT, CEA-Saclay, for reading the manuscript, pointing out mistakes and suggesting improvements. I thank Dr. Swarup Kumar Majee, Biplob Bhattacharjee and Kirtiman Ghosh for their collaborations and insightful discussions on the nuances of particle physics.
    [Show full text]
  • A Different Perspective
    A different perspective An Introductory Course of Statistical Mechanics Palash B. Pal, 394 Pages, Narosa Publishing (Rs.334) Reviewer : Sushan Konar, NCRA-TIFR, Pune e-mail : [email protected], phone - 8551072658 The reviewer works on the physics of stellar compact objects (white dwarfs, neutron stars) for her livelihood and writes a blog about life in academia as a hobby. An Introductory Course of Statistical Mechanics (Pal 2008) is a pedagogic textbook primarily meant for graduate and advanced undergraduate physics students. Palash Baran Pal, a theoretical physicist, working at Saha Institute of Nuclear Physics (Kolkata) is a prolific author. Besides authoring a number of research monographs and advanced physics textbooks, he has also written several popular science books. However, Prof. Pal is known best for his ability to explain complex concepts in simple terms, and writing these down in easily understandable format. He is an exceptional teacher in a classroom setting. He is also an exceptional teacher through written words - for students who can have the privilege of learning across vast distances whether such distances are measured in kilometers or in years. Happily, this particular book under consideration bears this hallmark characteristic of Prof. Pal. In an earlier generation, the best physics teachers typically had the reputation of being hard taskmasters. Con- sequently, most students had to cut their teeth on two heavy volumes of Statistical Physics by Landau & Lif- shitz (Landau & Lifshitz 1980a; Landau & Lifshitz 1980b). Though the uphill task of working through Landau would usually be made a little easier by the companionship of Pathria (1996), the beloved old faithful for gen- erations of physics students.
    [Show full text]