Objective Almost all we know about particle physics and the Standard Model comesfrom scattering experiments and our ability to predict them viascattering amplitudes (these measure probabilities of scatteringprocesses). To meet the impressive technological advances of particlecolliders like the Large Hadron Collider at CERN, new tools andconcepts have emerged over the last 25 years. More than givingmethods, they have triggered a revolution in our understanding of theformal microscopic structure of particle physics, a subject peoplethought they knew everything about.My program is based on a set of formulæ due to Cachazo, He & Yuan(CHY), that challenge the way we think about scatteringamplitudes. They relate to 'twistor' ideas and string theory. Theformer aims at manifesting the geometry of field theories, but failedso far to grasp their quantum-ness. The latter, in spite of itsmathematical beauty, has the drawback of having additionalcontributions that are hard to decouple from the field theoryones. The CHY formulæ retain the advantages of both methods, and leadto a variety of remarkable expressions for scattering amplitudes in aincreasing number of theories, including gauge, gravity and scalartheories.In a crucial work, I showed that these methods actually carry over tothe first quantum correction: this was the first time ever thattwistor methods were shown to work at the quantum level. My projectaims to extend this and reformulate the full pertubative quantumexpansion of field theories in the CHY language. This would be a majorconceptual advance. I explain that to do so will require to understanda more fundamental object called Null String, whose quantization willshed light on my 'quantum CHY formalism'. I also propose applicationsof the formalism of interest for LHC physic, like a third ordercalculation for the 2 to 3 gluon scattering in gauge theory, thatall other existing methods have failed to determine so far. Fields of science natural sciencesphysical sciencestheoretical physicsparticle physicsparticle acceleratornatural sciencesphysical sciencesastronomyobservational astronomygravitational wavesnatural sciencesmathematicspure mathematicsarithmeticsnatural sciencesphysical sciencestheoretical physicsstring theorynatural sciencesmathematicspure mathematicsalgebraalgebraic geometry Keywords High Energy Physics Scattering Amplitudes String Theory Gauge Theories and Gravity Precision Calculations Programme(s) H2020-EU.1.3. - EXCELLENT SCIENCE - Marie Skłodowska-Curie Actions Main Programme H2020-EU.1.3.2. - Nurturing excellence by means of cross-border and cross-sector mobility Topic(s) MSCA-IF-2016 - Individual Fellowships Call for proposal H2020-MSCA-IF-2016 See other projects for this call Funding Scheme MSCA-IF - Marie Skłodowska-Curie Individual Fellowships (IF) Coordinator ORGANISATION EUROPEENNE POUR LA RECHERCHE NUCLEAIRE Net EU contribution € 175 419,60 Address Esplanade des particules 1 parcelle 11482 de meyrin batiment cadastral 1046 1211 Geneve 23 Switzerland See on map Region Schweiz/Suisse/Svizzera Région lémanique Genève Links Contact the organisation Opens in new window Website Opens in new window Participation in EU R&I programmes Opens in new window HORIZON collaboration network Opens in new window Other funding € 0,00
