BEGIN:VCALENDAR VERSION:2.0 PRODID:-//CERN//INDICO//EN BEGIN:VEVENT SUMMARY:Higgs Centre School of Theoretical Physics 2026 DTSTART:20260525T073000Z DTEND:20260529T170000Z DTSTAMP:20260423T031100Z UID:indico-event-402@indico.ph.ed.ac.uk DESCRIPTION:The 11th edition of the Higgs Centre School of Theoretical Phy sics will take place from the 25th-29th of May 2026. The scientific progra mme starts at 9:00 on Monday the 25th\, and ends at 17:00 on Friday the 29 th.\nThe School comprises two in-depth lecture series\, each involving fiv e 2-hour lectures delivered on the blackboard\, and a similar number of tu torials.\nFor this year's School our two lecturers will be Ira Rothstein ( Carnegie Mellon University) and Raju Venugopalan (Brookhaven National Lab and Stony Brook University) who are both on Sabbatical in Edinburgh.\nIra Rothstein - A Systematic Approach to the Problem of High Energy Scattering \nIn these lectures I will use Effective Field Theory techniques to develo p a formalism which allows one to systematically calculate scattering ampl itudes for gauge theories in the so-called Regge limit where s>>t. Quantum field theory in this limit is particularly challenging as the usual pertu rbative expansions enhanced by canonical renormalization group techniques fail. I will demonstrate how effective field theory techniques can be used to systematically calculate in an expansion in t/s while re-summing logs of the large ratio s/t. The importance of the Regge limit for collider exp eriments as well as gravitational astronomy will be discussed.\nOutline of Lectures: 1) Introduction to canonical effective field theories. 2) Modal Effective Field Theories: SCET for QCD Hard Scattering 3) Modal Effective Field Theories: SCET for QCD in Regge limit 4) The rapidity renormalizati on group 5) Forward Scattering in GR: The classical and the quantum.\nRaju Venugopalan - Multi-particle production in QCD and gravity at high energi es: from amplitudes to shockwaves\nThese lectures discuss multi-particle p roduction in QCD and in gravity at ultra-relativistic energies\, the remar kable double copy relations between the two\, and strong parallels in emer gent shockwave dynamics. We begin by motivating why these issues are stron gly relevant for current and future experimental programs\, both at collid ers and at gravitation wave observatories. They also touch upon outstandin g open problems in theories that are sometimes believed to be well-underst ood.\nWe next demonstrate how dispersive techniques from S-matrix theory c an be applied to derive the BFKL equation for multi-gluon production in Re gge asymptotics. Identical methods apply in gravity and are captured by a gravitational Lipatov equation. The building blocks in both cases are so-c alled Lipatov vertices and reggeized propagators. These satisfy double cop y relations\, and their dynamics is captured by a reggeon field theory. In gravity\, Weinberg's soft theorem is recovered as a limit of the Lipatov framework\; soft theorems can similarly be derived in the gauge theory con text.\nBFKL evolution in QCD generates non-perturbative wee parton states of maximal occupancy characterized by an emergent semi-hard saturation sca le. Renormalization group equations in a Color Glass Condensate (CGC) EFT describe wee parton correlations and their rapidity evolution. We outline the concrete connections between the CGC EFT and reggeon field theory. A s hockwave picture of deeply inelastic scattering and hadron-hadron collisio ns follows\, with multi-particle production described by Cutkosky's rules in strong time-dependent fields. We outline the generalized factorization theorems that capture universal features of this dynamics\, the end result of which is the formation of a quark-gluon plasma.\nGluon radiation in th e CGC EFT has a double copy in gravitational shockwave collisions\, with a similar correspondence applicable between gluon and graviton shockwave pr opagators. Possible extensions of this semi-classical double copy are outl ined for computing multi-particle production in gravitational shockwave co llisions\, self-force and tidal contributions\, and classical and quantum noise in the focusing of geodesics\, opening a novel EFT motivated window into black hole formation and gravitational radiation.\nInformation for de legates: This is an in-person event only and the fee to attend is £50 (fo r external participants only). A funding subsidy towards the cost of accom modation (£200) will be available to the first external 25 people who reg ister and attend the event.\nOnce you have completed registration on Indic o\, please follow the link below to pay the £50.00 attendance fee (for ex ternal participants only).\nHiggs School attendance fee payment link \nPle ase note that accommodation is not provided. We have attached a list of ac commodation options in Edinburgh and recommend that you book your accommod ation as soon as possible. Please also note that lunch is not provided but there are plenty of cafes on campus to choose from: King's Buildings | Un iversity Cafes and Catering | University Cafes and Catering\nIf you have a ny questions please contact sopa.events@ed.ac.uk\nREGISTRATION IS NOW OPEN \n\n\nAll participants in HCTP activities are expected to show respect and courtesy to others throughout the duration of an event\, including at soc ial events. We draw the participants’ attention to the HCTP Code of Cond uct\n\nTravel Scam! \nIf you received emails from travellerpoint(dot)org ( or another travel company)\, please be careful. The email asks about arriv al and departure dates to Edinburgh and offers a hotel booking form where they ask for credit card details. Please\, ignore the emails and do not re ply nor click on any link given by them. You can also block the domain on your email client. Our official emails are all from this website’s domai n “@ed.ac.uk” (usually\, sopa.events@ed.ac.uk). Please avoid giving pr ivate information to external sources. The only official way to register f or our workshops and events are advertised via this website (or indico) an d we will get in touch directly if we book accommodation for you.\n \nSpo nsorship:  This school is funded by the Higgs Centre with support by the IPPP\, Durham.\n\n \n\nhttps://indico.ph.ed.ac.uk/event/402/ LOCATION:4305 (Higgs Centre Seminar Room) URL:https://indico.ph.ed.ac.uk/event/402/ END:VEVENT END:VCALENDAR