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Student Seminar Subatomic Physics Herbert Löhner, Olaf Scholten, Johan Messchendorp

Student Seminar Subatomic Physics Herbert Löhner, Olaf Scholten, Johan Messchendorp

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Student Seminar Subatomic Physics Herbert Löhner, Olaf Scholten, Johan Messchendorp

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  1. Student Seminar Subatomic Physics Herbert Löhner, Olaf Scholten, Johan Messchendorp 1st block, semester 1, 2008/2009Wednesday 15:15-17:00This course is given in the style of a seminar with an introduction by the lecturers and presentations given by the participants. A topic of high current interest in subatomic physics will be studied by discussing review articles from recent literature. Participants will be supervised by the instructors in individually arranged coaching sessions in preparing their specific contribution for the presentation. Current topic: Physics of CharmLiterature: S. Bianco, F.L. Fabbri, D. Benson, I. Bigi, A Cicerone for the Physics of Charm.( hep-ex/0309021) Website: t.b.a with current info

  2. S. Bianco, F.L. Fabbri, D. Benson, I. Bigi, A Cicerone for the Physics of Charm, (hep-ex/0309021) • history of charm physics • student contributions on different theoretical approaches, experimental issues and results • KVI interests: • Fundamental interactions & symmetries, • Hadron physics in relation to GSI program

  3. Student Seminar, Grading Criteria Final written exam, based on presented material; vrijstelling mogelijk bij voldoende resultaat wekelijkse deelname Preparation: Making use of proposed literature Incorporating additional literature Understanding of the subject matter Depth of the presentation Structure of the presentation Presentation: Formulation of stimulating questions Answering questions from audience Presentation technique Quality of slides Time management Participation: Presence during seminar hours Active participation during seminar hours Contributing questions before the seminar sessions Answering questions at the end of seminar sessions

  4. Seminar Preparation Timeline week N-3 discuss outline material N-2 present overview presentation N-1 1st trial presentation N Monday 2nd trial presentation N Wednesday Presentation

  5. Schedule date Topic CoordinatorSpeaker(s) 3 sept Introduction- overview and assignment of subjectsO.S. 10 sept. Panda meeting in Ferrara - 17 sept. Theory; The Quark & Bag Models (4.1) O.S./J.M. 24 sept. Theory; Effective Field Theory (4.3) O.S. 1 oct. Theory;- Lattice QCD (4.9)O.S. 8 oct. Production Dynamics (5)- H.L.. 15 oct. Spectroscopy (6) – The spectrum of charmed mesons H.L. 22 oct. Decays (7,8,9) - What can be learned from decays J.M. 29 oct. Oscillations (10) – Mixing between D and anti-D J.M. 5 nov. CP violation (11) H.L.

  6. Physics of Charm aim: set context for this lecture series subject: role of charm in standard model

  7. Mass 3 families • quarks • leptonen

  8. History of Charm First Evidence: Charge current operator and splitting of KL and KS Data suggested mc = 2 GeV (In these days the quark model was not yet accepted!!) 1971: First evidence for charmed mesons in cosmic-ray emulsion experiment. 1974, october: Discovery of Charmonium, J/Ψ (Jpc=1--) by Ting (BNL) and Richter (SLAC), a state at 3.1 GeV with a very narrow width. 1974, D-mesons as narrow states in K+π Since: spectrum of Charmonium and charmed mesons

  9. Charmonium Spectrum Charmonium is a bound stateof a charmed quark andantiquark. It is “almost nonrelativistic”: b ~ 0.4: Hence the hydrogen atom-likespectrum threshold 3.8 GeV 3S1 y(2S) or y’ 3P2 c2 c1 3P1 Mass 3P0 c0 J/y 3S1 3 GeV

  10. Review: Quantum Numbers Spin Angular Momentum Means: Quark Spin=1 (3 = 2 x 1 + 1) Quark Orbital Ang. Mom. = 0 Total J/y Spin = 1 Orbital Angular Momentum Means: Total J/y Spin = 1 Parity is Odd Charge Conjugation is Odd Total Angular Momentum

  11. Quarkonium Potential A not-too-terrible model of the quark-antiquark force law: A spring-like part This piece comes from the non-Abelian nature of QCD: the fact that you have 3-gluon and 4-gluon couplings.In QED, there is no gg coupling, sothis term is absent A Coulomb-like part This is just like QED:(sometimes called the“chromoelectric” force)

  12. Charmonium Spectrum Revisited Ted Barnes, Int. J. Mod. Phys. A21 (2006) 5583 hep- ph/0608103v1 From: Brian Fulsom, 2007

  13. Basic Interests • 1/mc may serve as perturbation parameter • Charmed states are distinct in Energy • CP-violation laboratory • (shows primarily in decays) What is structure states???

  14. Schedule date Topic CoordinatorSpeaker(s) 3 sept Introduction- overview and assignment of subjectsO.S. 10 sept. Panda meeting in Ferrara - 17 sept. Theory; The Quark & Bag Models (4.1) O.S./J.M. 24 sept. Theory; Effective Field Theory (4.3) O.S. 1 oct. Theory;- Lattice QCD (4.9)O.S. 8 oct. Production Dynamics (5)- H.L.. 15 oct. Spectroscopy (6) – The spectrum of charmed mesons H.L. 22 oct. Decays (7,8,9) - What can be learned from decays J.M. 29 oct. Oscillations (10) – Mixing between D and anti-D J.M. 5 nov. CP violation (11) H.L.

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