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Power to the LHC data: an ASYmptotically MOdel-independent measurement of the W boson mass

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.

Call for proposal

ERC-2020-COG
See other projects for this call

Funding Scheme

ERC-COG - Consolidator Grant

Host institution

UNIVERSITA DI PISA
Address
Lungarno Pacinotti 43/44
56126 Pisa
Italy
Activity type
Higher or Secondary Education Establishments
EU contribution
€ 936 250

Beneficiaries (3)

UNIVERSITA DI PISA
Italy
EU contribution
€ 936 250
Address
Lungarno Pacinotti 43/44
56126 Pisa
Activity type
Higher or Secondary Education Establishments
ISTITUTO NAZIONALE DI FISICA NUCLEARE
Italy
EU contribution
€ 435 000
Address
Via Enrico Fermi 54
00044 Frascati
Activity type
Research Organisations
SCUOLA NORMALE SUPERIORE
Italy
EU contribution
€ 312 500
Address
Piazza Dei Cavalieri 7
56126 Pisa
Activity type
Higher or Secondary Education Establishments