Project description DEENESFRITPL A clean slate and a huge data set could help constrain the W boson’s mass According to the Standard Model of particle physics, our entire Universe consists of 17 fundamental particles. These include the building blocks of matter, six quarks and six leptons, and five force carrying particles, including the W boson. The W boson was discovered about four decades ago, and scientists are still trying to determine its mass accurately. There is a discrepancy between its expected value based on the Standard Model and its experimentally determined one. The EU funded ASYMOW project will try a novel approach, throwing prior knowledge to the wind and instead relying on the large amount of available data from the most advanced experiments. Show the project objective Hide the project objective Objective Despite its success in describing the sub-nuclear realm, the Standard Model of particle and field interactions cannot account for a number of experimental facts that constitute evidence of new and unknown physics. Sitting at both the energy and intensity frontier, the LHC grants the highest chances for solving the current puzzle. By exploiting the data collected by the CMS experiment at the LHC, ASYMOW aims at attaining an unprecedented experimental accuracy on a fundamental parameter of Nature: the mass of the W boson. As of today, there is a tension between the Standard Model expectation and the measured value of the W boson mass. A new measurement with a 10 MeV uncertainty, i.e. twice as small as the single best measurement, is a breakthrough: it could either rule out the tension or build a convincing case that this anomaly is real, thus implying the existence of new physics. The collider physics community has been pursuing this goal for decades. The quest now seems to have hit the wall of systematic uncertainty. This project proposes a new approach towards the W boson mass measurement, which will circumvent the systematic uncertainties that are currently limiting the precision. The novelty of the proposed method lies in its agnosticism with respect to the microscopic picture of W boson production in hadron collisions. The loss of prior knowledge inherent to this new approach will be asymptotically compensated by the large amount of data available for the measurement, as will be collected at the LHC. ASYMOW will be conducted by a small group of scientists and comes with great experimental and theoretical challenges. The main expected result is the measurement of the W boson mass with a precision better than the state-of-the-art. This may open new scenarios in particle physics. Fields of science natural sciencesphysical sciencestheoretical physicsparticle physicsw bosons Programme(s) H2020-EU.1.1. - EXCELLENT SCIENCE - European Research Council (ERC) Main Programme Topic(s) ERC-2020-COG - ERC CONSOLIDATOR GRANTS Call for proposal ERC-2020-COG See other projects for this call Funding Scheme ERC-COG - Consolidator Grant Host institution UNIVERSITA DI PISA Net EU contribution € 936 250,00 Address LUNGARNO PACINOTTI 43/44 56126 Pisa Italy See on map Region Centro (IT) Toscana Pisa Activity type Higher or Secondary Education Establishments 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 Total cost € 936 250,00 Beneficiaries (3) Sort alphabetically Sort by Net EU contribution Expand all Collapse all UNIVERSITA DI PISA Italy Net EU contribution € 936 250,00 Address LUNGARNO PACINOTTI 43/44 56126 Pisa See on map Region Centro (IT) Toscana Pisa Activity type Higher or Secondary Education Establishments 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 Total cost € 936 250,00 ISTITUTO NAZIONALE DI FISICA NUCLEARE Italy Net EU contribution € 435 000,00 Address Via Enrico Fermi 54 00044 Frascati See on map Region Centro (IT) Lazio Roma Activity type Research Organisations 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 Total cost € 435 000,00 SCUOLA NORMALE SUPERIORE Italy Net EU contribution € 312 500,00 Address PIAZZA DEI CAVALIERI 7 56126 Pisa See on map Region Centro (IT) Toscana Pisa Activity type Higher or Secondary Education Establishments 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 Total cost € 312 500,00