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Μ → Eγ and Matching at Mw
Eur. Phys. J. C (2016) 76:370 DOI 10.1140/epjc/s10052-016-4207-5 Regular Article - Theoretical Physics μ → eγ and matching at mW Sacha Davidson1,2,3,a 1 IPNL, CNRS/IN2P3, 4 rue E. Fermi, 69622 Villeurbanne Cedex, France 2 Université Lyon 1, Villeurbanne, France 3 Université de Lyon, 69622 Lyon, France Received: 18 March 2016 / Accepted: 14 June 2016 / Published online: 4 July 2016 © The Author(s) 2016. This article is published with open access at Springerlink.com Abstract Several experiments search for μ ↔ e flavour attempt to reconstruct the fundamental Lagrangian of New change, for instance in μ → e conversion, μ → eγ and Physics from the operator coefficients. This is probably not μ → eee¯ . This paper studies how to translate these experi- feasible, but could give interesting perspectives. A first step mental constraints from low energy to a New Physics scale in this “bottom-up” approach, explored in this paper, is to M mW . A basis of QCD × QED-invariant operators (as use Effective Field Theory (EFT) [31] to translate the exper- appropriate below mW ) is reviewed, then run to mW with imental bounds to the coefficients of effective operators at one-loop Renormalisation Group Equations (RGEs) of QCD the New Physics scale M > mW . and QED. At mW , these operators are matched onto SU(2)- The goal would be to start from experimental constraints invariant dimension-six operators, which can continue to run on μ–e flavour change, and obtain at M the best bound up with electroweak RGEs. As an example, the μ → eγ on each coefficient from each observable. -
Regulatory Actions in Radiotherapy
August 10, 2017 CONSIDERATIONS ON POTENTIAL REGULATORY ACTIONS FOR RADIATION PROTECTION IN RADIOTHERAPY: MONITORING UNWANTED RADIATION EXPOSURE IN RADIOTHERAPY A proposal for further discussion drafted by Autoridad Regulatoria Nuclear of Argentina and the Secretariat of the International Atomic Energy Agency (Product from the Practical Arrangements between the International Atomic Energy Agency and the Autoridad Regulatoria Nuclear of Argentina on cooperation in the area of radiation safety and monitoring) Interim Document I. INTRODUCTION BACKGROUND (1) On September 18, 2015, the Autoridad Regulatoria Nuclear (ARN) 1 of Argentina and the Secretariat of the International Atomic Energy Agency (IAEA)2, hereinafter termed ‘the Parties’, agreed on ‘Practical Arrangements’ setting forth the framework for non-exclusive cooperation between the Parties in the area of radiation safety and monitoring. The agreement was reconfirmed and partially enhanced during ceremony presided by the Chairman of ARN, Néstor Masriera, and the Deputy Director General of the IAEA, Juan Carlos Lentijo, with the presence of the Argentine Ambassador, Rafael Mariano Grossi, in the framework of the 60th Annual Regular Session of the IAEA General Conference, in Vienna, on September 30, 2016. (2) The Practical Arrangements identify activities in which cooperation between the Parties may be pursued subject to their respective mandates, governing regulations, rules, policies and procedures. A relevant activity agreed to be pursued is the ‘development of regulatory guidance -
Mesons Modeled Using Only Electrons and Positrons with Relativistic Onium Theory Ray Fleming [email protected]
All mesons modeled using only electrons and positrons with relativistic onium theory Ray Fleming [email protected] All mesons were investigated to determine if they can be modeled with the onium model discovered by Milne, Feynman, and Sternglass with only electrons and positrons. They discovered the relativistic positronium solution has the mass of a neutral pion and the relativistic onium mass increases in steps of me/α and me/2α per particle which is consistent with known mass quantization. Any pair of particles or resonances can orbit relativistically and particles and resonances can collocate to form increasingly complex resonances. Pions are positronium, kaons are pionium, D mesons are kaonium, and B mesons are Donium in the onium model. Baryons, which are addressed in another paper, have a non-relativistic nucleon combined with mesons. The results of this meson analysis shows that the compo- sition, charge, and mass of all mesons can be accurately modeled. Of the 220 mesons mod- eled, 170 mass estimates are within 5 MeV/c2 and masses of 111 of 121 D, B, charmonium, and bottomonium mesons are estimated to within 0.2% relative error. Since all mesons can be modeled using only electrons and positrons, quarks and quark theory are unnecessary. 1. Introduction 2. Method This paper is a report on an investigation to find Sternglass and Browne realized that a neutral pion whether mesons can be modeled as combinations of (π0), as a relativistic electron-positron pair, can orbit a only electrons and positrons using onium theory. A non-relativistic particle or resonance in what Browne companion paper on baryons is also available. -
The Muon G-2 Discrepancy: Errors Or New Physics?
The muon g-2 discrepancy: errors or new physics? † M. Passera∗, W. J. Marciano and A. Sirlin∗∗ ∗Istituto Nazionale Fisica Nucleare, Sezione di Padova, I-35131, Padova, Italy †Brookhaven National Laboratory, Upton, New York 11973, USA ∗∗Department of Physics, New York University, 10003 New York NY, USA Abstract. After a brief review of the muon g 2 status, we discuss hypothetical errors in the Standard Model prediction that could explain the present discrepancy with the− experimental value. None of them looks likely. In particular, an hypothetical + increase of the hadroproduction cross section in low-energy e e− collisions could bridge the muon g 2 discrepancy, but is shown to be unlikely in view of current experimental error estimates. If, nonetheless, this turns out to− be the explanation of the discrepancy, then the 95% CL upper bound on the Higgs boson mass is reduced to about 130 GeV which, in conjunction with the experimental 114.4 GeV 95% CL lower bound, leaves a narrow window for the mass of this fundamental particle. Keywords: Muon anomalous magnetic moment, Standard Model Higgs boson PACS: 13.40.Em, 14.60.Ef, 12.15.Lk, 14.80.Bn SM 11 INTRODUCTION aµ = 116591778(61) 10− . The difference with the EXP× 11 experimental value aµ = 116592080(63) 10− [1] The anomalousmagnetic momentof the muon, aµ ,isone EXP SM 11 × is ∆aµ = aµ aµ =+302(88) 10− , i.e., 3.4σ (all of the most interesting observables in particle physics. errors were added− in quadrature).× Similar discrepan- Indeed, as each sector of the Standard Model (SM) con- HLO cies are found employing the aµ values reported in tributes in a significant way to its theoretical prediction, Refs. -
![Arxiv:2009.05616V2 [Hep-Ph] 18 Oct 2020 ± ± Bution from the Decays K → Π A2π (Considered in [1]) 2 0 0 Mrα Followed by the Decay A2π → Π Π [7]](https://docslib.b-cdn.net/cover/6215/arxiv-2009-05616v2-hep-ph-18-oct-2020-%C2%B1-%C2%B1-bution-from-the-decays-k-a2-considered-in-1-2-0-0-mr-followed-by-the-decay-a2-7-436215.webp)
Arxiv:2009.05616V2 [Hep-Ph] 18 Oct 2020 ± ± Bution from the Decays K → Π A2π (Considered in [1]) 2 0 0 Mrα Followed by the Decay A2π → Π Π [7]
Possible manifestation of the 2p pionium in particle physics processes Peter Lichard Institute of Physics and Research Centre for Computational Physics and Data Processing, Silesian University in Opava, 746 01 Opava, Czech Republic and Institute of Experimental and Applied Physics, Czech Technical University in Prague, 128 00 Prague, Czech Republic 0 We suggest a few particle physics processes in which excited 2p pionium A2π may be observed. They include the e+e− ! π+π− annihilation, the V 0 ! π0`+`− and K± ! π±`+`− (` = e; µ) decays, and the photoproduction of two neutral pions from nucleons. We analyze available exper- imental data and find that they, in some cases, indicate the presence of 2p pionium, but do not provide definite proof. I. INTRODUCTION that its quantum numbers J PC = 1−− prevent it from decaying into the positive C-parity π0π0 and γγ states. The first thoughts about an atom composed of a pos- It must first undergo the 2p!1s transition to the ground state. The mean lifetime of 2p pionium itive pion and a negative pion (pionium, or A2π in the present-day notation) appeared almost sixty years ago. τ = 0:45+1:08 × 10−11 s: (1) Uretsky and Palfrey [1] assumed its existence and ana- 2p −0:30 lyzed the possibilities of detecting it in the photoproduc- is close to the value which comes for the π+π− atom tion off hydrogen target. Up to this time, such a process assuming a pure Coulomb interaction [8]. After reaching has not been observed. They also hypothesized about the 0 0 the 1s state, a decay to two π s quickly follows: A2π ! possibility of decay K+ ! π+A , which has recently 0 0 2π A2π + γ ! π π γ. -
Up FDG-PET in Patients with Localized Nasal Natural Killer/T-Cell Lymphoma Receiving Concurrent Chemoradiotherapy
Original Article Page 1 of 9 Preliminary study of integrating pretreatment and early follow- up FDG-PET in patients with localized nasal natural killer/T-cell lymphoma receiving concurrent chemoradiotherapy Chen-Xiong Hsu1,2, Shan-Ying Wang2,3, Chiu-Han Chang1,2, Tung-Hsin Wu2, Shih-Chiang Lin4, Pei-Ying Hsieh4, Pei-Wei Shueng1,5,6 1Department of Radiation Oncology, Far Eastern Memorial Hospital, New Taipei City, Taiwan; 2Department of Biomedical Imaging and Radiological Sciences, National Yang-Ming University, Taipei, Taiwan; 3Department of Nuclear Medicine, 4Division of Medical Oncology and Hematology, Far Eastern Memorial Hospital, New Taipei City, Taiwan; 5Department of Medicine, National Yang-Ming University, Taipei, Taiwan; 6Department of Radiation Oncology, National Defense Medical Center, Taipei, Taiwan Contributions: (I) Conception and design: CX Hsu, TH Wu, PW Shueng; (II) Administrative support: TH Wu, SY Wang, SC Lin, PW Shueng; (III) Provision of study materials or patients: CX Hsu, SY Wang, SC Lin, PY Hsieh; (IV) Collection and assembly of data: CX Hsu, SY Wang, CH Chang; (V) Data analysis and interpretation: CX Hsu, SY Wang, PW Shueng; (VI) Manuscript writing: All authors; (VII) Final approval of manuscript: All authors. Correspondence to: Pei-Wei Shueng, MD. Department of Radiation Oncology, Far Eastern Memorial Hospital, No. 21 Section 2, Nanya South Road, Banciao District, New Taipei City. Email: [email protected]; Tung-Hsin Wu, PhD. Department of Biomedical Imaging and Radiological Sciences, National Yang-Ming University, No.155, Sec.2, Linong Street, Taipei. Email: [email protected]. Background: The optimal treatment modality for stage I/II extranodal nasal natural killer/T-cell lymphoma (NKTL) including radiotherapy (RT) alone, concurrent, or sequential chemoradiotherapy and radiation doses were not well-defined. -
Should Helical Tomotherapy Replace Brachytherapy for Cervical Cancer?
Hsieh et al. BMC Cancer 2010, 10:637 http://www.biomedcentral.com/1471-2407/10/637 CASE REPORT Open Access Should helical tomotherapy replace brachytherapy for cervical cancer? Case report Chen-Hsi Hsieh1,4, Ming-Chow Wei2, Yao-Peng Hsu3, Ngot-Swan Chong1, Yu-Jen Chen4,5,6,7, Sheng-Mou Hsiao2, Yen-Ping Hsieh8, Li-Ying Wang10, Pei-Wei Shueng1,9* Abstract Background: Stereotactic body radiation therapy (SBRT) administered via a helical tomotherapy (HT) system is an effective modality for treating lung cancer and metastatic liver tumors. Whether SBRT delivered via HT is a feasible alternative to brachytherapy in treatment of locally advanced cervical cancer in patients with unusual anatomic configurations of the uterus has never been studied. Case Presentation: A 46-year-old woman presented with an 8-month history of abnormal vaginal bleeding. Biopsy revealed squamous cell carcinoma of the cervix. Magnetic resonance imaging (MRI) showed a cervical tumor with direct invasion of the right parametrium, bilateral hydronephrosis, and multiple uterine myomas. International Federation of Gynecology and Obstetrics (FIGO) stage IIIB cervical cancer was diagnosed. Concurrent chemoradiation therapy (CCRT) followed by SBRT delivered via HT was administered instead of brachytherapy because of the presence of multiple uterine myomas with bleeding tendency. Total abdominal hysterectomy was performed after 6 weeks of treatment because of the presence of multiple uterine myomas. Neither pelvic MRI nor results of histopathologic examination at X-month follow-up showed evidence of tumor recurrence. Only grade 1 nausea and vomiting during treatment were noted. Lower gastrointestinal bleeding was noted at 14-month follow- up. -
Sub Atomic Particles and Phy 009 Sub Atomic Particles and Developments in Cern Developments in Cern
1) Mahantesh L Chikkadesai 2) Ramakrishna R Pujari [email protected] [email protected] Mobile no: +919480780580 Mobile no: +917411812551 Phy 009 Sub atomic particles and Phy 009 Sub atomic particles and developments in cern developments in cern Electrical and Electronics Electrical and Electronics KLS’s Vishwanathrao deshpande rural KLS’s Vishwanathrao deshpande rural institute of technology institute of technology Haliyal, Uttar Kannada Haliyal, Uttar Kannada SUB ATOMIC PARTICLES AND DEVELOPMENTS IN CERN Abstract-This paper reviews past and present cosmic rays. Anderson discovered their existence; developments of sub atomic particles in CERN. It High-energy subato mic particles in the form gives the information of sub atomic particles and of cosmic rays continually rain down on the Earth’s deals with basic concepts of particle physics, atmosphere from outer space. classification and characteristics of them. Sub atomic More-unusual subatomic particles —such as particles also called elementary particle, any of various self-contained units of matter or energy that the positron, the antimatter counterpart of the are the fundamental constituents of all matter. All of electron—have been detected and characterized the known matter in the universe today is made up of in cosmic-ray interactions in the Earth’s elementary particles (quarks and leptons), held atmosphere. together by fundamental forces which are Quarks and electrons are some of the elementary represente d by the exchange of particles known as particles we study at CERN and in other gauge bosons. Standard model is the theory that laboratories. But physicists have found more of describes the role of these fundamental particles and these elementary particles in various experiments. -
Implementation of Silicon Based Dosimeters, the Dose Magnifying
University of Wollongong Research Online University of Wollongong Thesis Collection University of Wollongong Thesis Collections 2011 Implementation of silicon based dosimeters, the dose magnifying glass and magic plate for the dosimetry of modulated radiation therapy Jeannie Hsiu Ding Wong University of Wollongong Recommended Citation Wong, Jeannie Hsiu Ding, Implementation of silicon based dosimeters, the dose magnifying glass and magic plate for the dosimetry of modulated radiation therapy, Doctor of Philosophy thesis, Centre for Medical Radiation Physics, Engineering Physics, University of Wollongong, 2011. http://ro.uow.edu.au/theses/3348 Research Online is the open access institutional repository for the University of Wollongong. For further information contact Manager Repository Services: [email protected]. IMPLEMENTATION OF SILICON BASED DOSIMETERS, THE DOSE MAGNIFYING GLASS AND MAGIC PLATE FOR THE DOSIMETRY OF MODULATED RADIATION THERAPY A Thesis Submitted in Fulfilment of the Requirements for the Award of the Degree of Doctor of Philosophy from UNIVERSITY OF WOLLONGONG by Jeannie Hsiu Ding Wong BBiomed. Eng., MMed.Phys. Centre for Medical Radiation Physics, Engineering Physics Faculty of Engineering 2011 © Copyright 2011 by Jeannie Hsiu Ding Wong ALL RIGHTS RESERVED CERTIFICATION I, Jeannie Hsiu Ding Wong, declare that this thesis, submitted in fulfilment of the requirements for the award of Doctor of Philosophy, in the Centre for Medical Radia- tion Physics, Engineering Physics, Faculty of Engineering, University of Wollongong, is wholly my own work unless otherwise referenced or acknowledged. The document has not been submitted for qualifications at any other academic institution. (Signature Required) Jeannie Hsiu Ding Wong 30 June 2011 Table of Contents ListofTables................................... vi List of Figures/Illustrations .......................... -
On the Exotic Higgs Decays in Effective Field Theory
Eur. Phys. J. C (2016) 76:514 DOI 10.1140/epjc/s10052-016-4362-8 Regular Article - Theoretical Physics On the exotic Higgs decays in effective field theory Hermès Bélusca-Maïtoa, Adam Falkowskib Laboratoire de Physique Théorique, Université Paris-Sud, Bat. 210, 91405 Orsay, France Received: 22 April 2016 / Accepted: 9 September 2016 / Published online: 22 September 2016 © The Author(s) 2016. This article is published with open access at Springerlink.com Abstract We discuss exotic Higgs decays in an effec- in powers of 1/. The leading effects are expected from tive field theory where the Standard Model is extended by operators of dimension 6, as their coefficients are suppressed dimension-6 operators. We review and update the status of by 1/2. The first classification of dimension-6 operators two-body lepton- and quark-flavor-violating decays involv- was performed in Ref. [1]. For one generation of fermions, ing the Higgs boson. We also comment on the possibility of a complete non-redundant set (henceforth referred to as a observing three-body flavor-violating Higgs decays in this basis) was identified and explicitly written down in Ref. [2]. context. Reference [3] extended this to three generations of fermions, in which case a basis is characterized by 2499 independent parameters. Contents In this paper we are interested in the subset of these operators that lead to exotic decays of the 125 GeV Higgs 1 Introduction ..................... 1 boson. By “exotic” we mean decays that are forbidden in 2 Exotic Higgs couplings from dimension-6 Lagrangian 2 the SM or predicted to occur with an extremely suppressed 3 Two-body Higgs decays .............. -
Relationship of Pionium Lifetime with Pion Scattering Lengths In
RELATIONSHIP OF PIONIUM LIFETIME WITH PION SCATTERING LENGTHS IN GENERALIZED CHIRAL PERTURBATION THEORY H. SAZDJIAN Groupe de Physique Th´eorique, Institut de Physique Nucl´eaire, Universit´eParis XI, F-91406 Orsay Cedex, France E-mail: [email protected] The pionium lifetime is calculated in the framework of the quasipotential-constraint theory approach, including the sizable electromagnetic corrections. The framework of generalized chiral perturbation theory allows then an analysis of the lifetime value as a function of the ππ S-wave scattering lengths with isospin I = 0, 2, the latter being dependent on the quark condensate value. The DIRAC experiment at CERN is expected to measure the pionium lifetime with a 10% accuracy. The pionium is an atom made of π+π−, which decays under the effect of strong interactions into π0π0. The physical interest of the lifetime is that it gives us information about the ππ scattering lengths. The nonrelativistic formula of the lifetime was first obtained by Deser et al. 1: 0 2 2 1 16π 2∆mπ (a0 − a0) 2 =Γ0 = 2 |ψ+−(0)| , ∆mπ = mπ+ − mπ0 , (1) τ0 9 s mπ+ mπ+ where ψ+−(0) is the wave function of the pionium at the origin (in x-space) 0 2 and a0, a0, the S-wave scattering lengths with isospin 0 and 2, respectively. The evaluation of the relativistic corrections to this formula can be done in a systematic way in the framework of chiral perurbation theory (χPT ) 2, in the presence of electromagnetism 3. There arise essentially two types of correction. arXiv:hep-ph/0012228v1 18 Dec 2000 (i) The pion-photon radiative corrections, which are similar to those met in conventional QED. -
Four-Dimensional MVCT Imaging and Spatial Translation of Helical Tomotherapy Dose Distributions Using Sinogram Modification
University of Tennessee, Knoxville TRACE: Tennessee Research and Creative Exchange Masters Theses Graduate School 12-2006 Four-Dimensional MVCT Imaging and Spatial Translation of Helical Tomotherapy Dose Distributions Using Sinogram Modification Samuel Scott Outten University of Tennessee - Knoxville Follow this and additional works at: https://trace.tennessee.edu/utk_gradthes Part of the Physics Commons Recommended Citation Outten, Samuel Scott, "Four-Dimensional MVCT Imaging and Spatial Translation of Helical Tomotherapy Dose Distributions Using Sinogram Modification. " Master's Thesis, University of Tennessee, 2006. https://trace.tennessee.edu/utk_gradthes/1757 This Thesis is brought to you for free and open access by the Graduate School at TRACE: Tennessee Research and Creative Exchange. It has been accepted for inclusion in Masters Theses by an authorized administrator of TRACE: Tennessee Research and Creative Exchange. For more information, please contact [email protected]. To the Graduate Council: I am submitting herewith a thesis written by Samuel Scott Outten entitled "Four-Dimensional MVCT Imaging and Spatial Translation of Helical Tomotherapy Dose Distributions Using Sinogram Modification." I have examined the final electronic copy of this thesis for form and content and recommend that it be accepted in partial fulfillment of the equirr ements for the degree of Master of Science, with a major in Physics. E. Ward Plummer, Major Professor We have read this thesis and recommend its acceptance: Marianne Breinig, Robert Compton Accepted