Origin of Mass 2012

28 May 2012, 08:00 → 22 Jun 2012, 18:00 Europe/Stockholm

132:028 (Nordita)

Niels Bohr (NBI)

Venue

Nordita, Stockholm, Sweden

Scope

______________

[Timetable - available from start of the program]

Format

Two workshops and a mini-conference are planned... _______ We aim at having two presentations a day during the mornings, and free time for discussions and project work during the afternoons. _______ There will be one or at most two talks per day with plenty of time for discussions in a relaxed atmosphere. _______

Time	Activity	Topic
November 1-3 _______	Workshop _______	Topic _______
November 22-24 _______	Conference _______	Topic _______

Invited Participants (tentative)

Erik Aurell, KTH, Stockholm Erik Aurell, KTH, Stockholm

Erik Aurell, KTH, Stockholm Erik Aurell, KTH, Stockholm

Application

If you want to apply for participation in the program, please fill in the application form. You will be informed by the organizers shortly after the application deadline whether your application has been approved. Due to space restrictions, the total number of participants is strictly limited. (Invited speakers are of course automatically approved, but need to register anyway.)

Application deadline: 5 March 2012

A minimum stay of one working week is required and we encourage participants to stay for a period of at least two weeks.

There is no registration fee.

Travel Reimbursement

PhD students and young Postdoc fellows are eligible for travel grants to participate in the program. If you are interested in such a grant, please mark the corresponding field in the application form, briefly summarize your interest in the program in the comments field, and indicate an estimation of your expected travel expenses. Since only a limited number of grants is available, decision concerning the grants will be made on a case-by-case basis and you will be notified shortly after the application deadline.

Accommodation

Nordita provides a limited number of rooms in the Stockholm apartment hotel BizApartments free of charge for accepted program participants.

Sponsored by:

Monday 28 May

10:30 → 11:30 Broken symmetries and the masses of gauge bosons

In a recent note it was shown that the Goldstone theorem, that Lorentz-covariant field theories in which spontaneous breakdown of symmetry under an internal Lie group occurs contains zero.mass particles, fails if and only if the conserved currents associated with the internal group are coupled to gauge fields. The purpose of the present note is to report that, as a consequence of this coupling, the spin-one quanta of some of the gauge fields acquire mass.

[1] P.W. Higgs, Phys.Rev.Lett 13 (1964) 508
[2] J. Goldstone, Nuov. Cim. 19 (1961) 154

Speaker: Peter Higgs (University of Edinburgh)

14:30 → 15:45 Quasi-Particles and Gauge Invariance in the Theory of Superconductivity

Ideas and techniques known in quantum electrodynamics have been applied to the Bardeen-Cooper-Schrieffer theory of superconductivity. In an approximation which corresponds to a generalization of the Hartree-Fock fields, one can write down an integral equation defining the self-energy of an electron in an electron gas with phonon and Coulomb interaction.

The form of the equation implies the existence of a particular solution which does not follow from perturbation theory, and which leads to the energy gap equation and the quasi-particle picture analogous to Bogoliubov's. The gauge invariance, to the first order in the external electromagnetic field, can be maintained in the quasi-particle picture by taking into account a certain class of corrections to the chargecurrent operator due to the phonon and Coulomb interaction. In fact, generalized forms of the Ward identity are obtained between certain vertex parts and the self-energy. The Meissner effect calculation is thus rendered strictly gauge invariant, but essentially keeping the BCS result unaltered for transverse fields. It is shown also that the integral equation for vertex parts allows homogeneous solutions which describe collective excitations of quasi-particle pairs, and the nature and effects of such collective states are discussed.

Speaker: Yoichiro Nambu (University of Chicago)

Tuesday 29 May

09:00 → 09:45 Broken symmetry and the mass of gauge vector mesons

Speaker: Robert Brout (Université Libre de Bruxelles)

09:45 → 10:30 Global conservation laws and massless particles

Speaker: Tom Kibble (Imperial College, London)

10:30 → 11:00 Coffee break

11:00 → 11:45 Global conservation laws and massless particles II

Speaker: Gerald Guralnik (Brown University)

11:45 → 12:30 Renormalizable Lagrangians for massive Yang-Mills fields

Speaker: Gerard 't Hooft (Utrecht University)

12:30 → 14:00 Lunch

14:00 → 14:45 Field theories with superconductor solutions

Speaker: Jeffrey Goldstone (MIT)

14:45 → 15:30 Plasmons, gauge invariance and mass

Speaker: Philip W. Anderson (Bell Labs)

15:30 → 16:00 Coffee break

16:00 → 17:30 Discussion

18:30 → 20:30 Dinner at AlbaNova

Thursday 31 May

08:00 → 08:20 ABC

Speaker: Mr lll kkk (ölk)