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Concept

Ère électrofaible

Publications associées (22)

LensWatch. I. Resolved HST Observations and Constraints on the Strongly Lensed Type Ia Supernova 2022qmx ("SN Zwicky")

Frédéric Courbin

Supernovae (SNe) that have been multiply imaged by gravitational lensing are rare and powerful probes for cosmology. Each detection is an opportunity to develop the critical tools and methodologies needed as the sample of lensed SNe increases by orders of ...

IOP Publishing Ltd2023

Search for a vector-like quark T′→ tH via the diphoton decay mode of the Higgs boson in proton-proton collisions at √s=13 TeV

Jian Wang, Matthias Finger, Qian Wang, Yiming Li, João Miguel das Neves Duarte, Matthias Wolf, Varun Sharma, Yi Zhang, Lei Zhang, Tian Cheng, Yixing Chen, Alexis Kalogeropoulos, Ioannis Papadopoulos, Hua Zhang, Siyuan Wang, Xin Chen, Michele Bianco, Sebastiana Gianì, Sun Hee Kim, Davide Di Croce, Jian Zhao, Rakesh Chawla, Jan Steggemann, Konstantin Androsov, Anna Mascellani, Federica Legger, Matteo Galli, Gabriele Grosso

A search for the electroweak production of a vector-like quark T, decaying to a top quark and a Higgs boson is presented. The search is based on a sample of proton-proton collision events recorded at the LHC at root s = 13 TeV, corresponding to an integrat ...

Springer Nature2023

Effective Field Theories for New and Old Physics

Alfredo Glioti

Effective Field Theories have changed our understanding of Quantum Field Theories. This thesis shows several applications of this powerful tool in the context of the Standard Model and for searches of New Physics. The thesis starts with a review of the St ...

EPFL2022

Standard model meets gravity: Electroweak symmetry breaking and inflation

Mikhail Chapochnikov, Andrey Shkerin, Sebastian Zell

We propose a model for combining the Standard Model (SM) with gravity. It relies on a nonminimal coupling of the Higgs field to the Ricci scalar and on the Palatini formulation of gravity. Without introducing any new degrees of freedom in addition to those ...

American Physical Society2021

Goldstone equivalence and high energy electroweak physics

Andrea Wulzer, Luca Vecchi, Gabriel Francisco Cuomo

The transition between the broken and unbroken phases of massive gauge theories, namely the rearrangement of longitudinal and Goldstone degrees of freedom that occurs at high energy, is not manifestly smooth in the standard formalism. The lack of smoothnes ...

2020

Understanding and Improving Fast Adversarial Training

Nicolas Henri Bernard Flammarion, Maksym Andriushchenko

A recent line of work focused on making adversarial training computationally efficient for deep learning models. In particular, Wong et al. (2020) showed that ℓ∞-adversarial training with fast gradient sign method (FGSM) can fail due to a phenomenon called ...

2020

Electroweak baryogenesis above the electroweak scale

Riccardo Rattazzi, Luca Vecchi, Alfredo Glioti

Conventional scenarios of electroweak (EW) baryogenesis are strongly constrained by experimental searches for CP violation beyond the SM. We propose an alternative scenario where the EW phase transition and baryogenesis occur at temperatures of the order o ...

Springer Nature2019

FCC Physics Opportunities: Future Circular Collider Conceptual Design Report Volume 1

Yi Zhang, Jan Steggemann, Hua Zhang, Elena Graverini, Jeffrey Alan Hubbell, Pierluigi Bruzzone, Jean-Michel Sallese, Mingkui Wang, Luca Rossi, Mikhail Chapochnikov, Thomas Rizzo, Rui Ning Wang, Mathias Oleg Knecht, Doohyun Kim, Yu Bai, Simon Van Mulders, Tatiana Pieloni, Nathalie Sophie Adeline Serra, Shourya Dutta Gupta, Juan Federico Esteban Müller, Philippe Schwaller, Xabier Sarasola Martin, Andrea Wulzer, Florian Patrick Marie Daniel De la Barre De Nanteuil, Rahul Kumar Gupta, Xavier Buffat, Michele Cascella, Fabio Avino, Andrey Denisov, Nicolas Andreini, Michael Schenk, Benedikt Moser, Anatole von Lilienfeld, Lorena Gonçalves de Alcântara e Freitas Krikler, Alexej Grudiev, José Luis Abelleira Fernández, Rafael Amorim Leandro De Castro Amoedo, Mukesh Kumar Tripathi, Francesco Cerutti, Sondre Vik Furuseth, Roberto Franceschini, Marco Drewes, Dragos-Adrian Seredinschi, Giovanni Migliorati, Vincenzo D'Auria, Ting-Yu Lee, Leonid Kahle, Luca Vecchi, Javier Barranco Garcia, Shang-Jung Wu, Guang Li, Alban Sublet, Darius Constantin Merk, Roberto Contino, Claudia Tambasco, Delio Aleardo Vicini, Xingyu Wu, Pablo Marcelo Perez Garcia, Jairo Camilo Quijano Perez, Andrea Thamm, Georgi Gorine, Jun Gu, Candice Megan T Young, Wanderson Oliveira Da Silva, Bernhard Auchmann, Léon Van Riesen-Haupt, Marc-Olivier Sauvain, Leonid Rivkin, Alexandra Sarabando de Carvalho, Soumya Banerjee, Agnieszka Chmielinska, Kim-Manuel Klein, Amirhossein Saba Shirvan, Craig Nowell, Peter Michael Vogel, Eva Maria Rodriguez Franco, José Luis Rivera Gutiérrez, Florent Philippe Maurice Duval, Lotta Maria Mether, Özdemir Can Kara, Franco Moretti, Charlotte Lorin, Sandra Aumon, Karin Irmgard Löw, Lucia Jimenez Rojo, Caroline Antonioli Pletscher, Emilie Jocelyne Marc Solange Collot, Mathias Béguin, Beat Mueller, Abdel Perez Hernandez, Dora Patricia Valente Salgueiro, Michael Andrew Theodore Fowler, Tobias Hurth, Arturo Rivetti, Maria Rosaria Antonelli, Maximilian Nikolaus Bauer, Jie Gao

We review the physics opportunities of the Future Circular Collider, covering its e(+)e(-), pp, ep and heavy ion programmes. We describe the measurement capabilities of each FCC component, addressing the study of electroweak, Higgs and strong interactions, ...

2019

Inconsistency of an inflationary sector coupled only to Einstein gravity

Daniel Garcia Figueroa, Erwin Handoko Tanin

From a model-building perspective, the inflationary sector might very well have no direct couplings to other species, apart from inevitable gravitational interactions. Within the context of General Relativity, a thermal universe can still emerge after infl ...

IOP PUBLISHING LTD2019

Inflationary perturbations with Lifshitz scaling

Sergey Sibiryakov

Instead of Lorentz invariance, gravitational degrees of freedom may obey Lifshitz scaling at high energies, as it happens in Horava's proposal for quantum gravity. We study consequences of this proposal for the spectra of primordial perturbations generated ...

IOP PUBLISHING LTD2019

Backreaction of electromagnetic fields and the Schwinger effect in pseudoscalar inflation magnetogenesis

Oleksandr Sobol

We study magnetogenesis in axionlike inflation driven by a pseudoscalar field phi coupled axially to the electromagnetic (EM) field (beta/M-p)phi F-mu nu(F) over tilde mu nu with dimensionless coupling constant beta. A set of equations for the inflaton fie ...

American Physical Society2019

Influence of backreaction of electric fields and Schwinger effect on inflationary magnetogenesis

Oleksandr Sobol

We study the generation of electromagnetic fields during inflation when the conformal invariance of Maxwell's action is broken by the kinetic coupling f(2)(phi)F mu nu F mu nu of the electromagnetic field to the inflaton field phi We consider the case wher ...

American Physical Society2018

Towards a non-perturbative approach to the Hierarchy problem

Andrey Shkerin

In this report, based on [1], we suggest that the hierarchy between the Electroweak (EW) and the Planck scales can emerge due to a nonperturbative effect that relates low-energy and strong-gravity physics. In this mechanism, the EW scale results from an ex ...

EDP SCIENCES2018

Magnetogenesis In Natural Inflation Model

Oleksandr Sobol

We study the process of inflationary magnetogenesis in the natural single-field inflation model, whose parameters are chosen in accordance with the recent observations by the Planck collaboration [1]. The conformal invariance of the Maxwell action is broke ...

BOGOLYUBOV INST THEORETICAL PHYSICS NATL ACAD SCI UKRAINE2018

Conformal symmetry: Towards the link between the Fermi and the Planck scales

Mikhail Chapochnikov, Andrey Shkerin

If the mass of the Higgs boson is put to zero, the classical Lagrangian of the Standard Model (SM) becomes conformally invariant (CI). Taking into account quantum non-perturbative QCD effects violating CI leads to electroweak symmetry breaking with the sca ...

ELSEVIER SCIENCE BV2018

Measurement of the CKM angle gamma using B-+/- -> DK +/- with D -> K-S(0)pi(+)pi(-), (KSK+K-)-K-0 decays

Jian Wang, Mingkui Wang, Olivier Schneider, Zhirui Xu, Yi Zhang, Lei Zhang, Aurelio Bay, Yi Wang, Guido Haefeli, Tatsuya Nakada, Frédéric Blanc, Minh Tâm Tran, Maurizio Martinelli, Donal Patrick Hill, Liang Sun, Jean Wicht, Liupan An, Elena Graverini, Plamen Hristov Hopchev, Renato Quagliani, Hang Yin, Maria Vieites Diaz, Olivier Göran Girard, Axel Kuonen, Aravindhan Venkateswaran, Michel De Cian, Maria Elena Stramaglia, Vladimir Macko, Federico Leo Redi, Luis Miguel Garcia Martin, Vitalii Lisovskyi, Tara Nanut, Alessio Ferrari, Violaine Bellée, Guillaume Max Pietrzyk, Pavol Stefko, Pietro Marino, Matthieu Philippe Luther Marinangeli, François Fleuret, Vladislav Balagura, Guido Andreassi, Luca Pescatore, Preema Rennee Pais, Maxime Schubiger, Christoph Frei, Chitsanu Khurewathanakul, Greig Alan Cowan, Mirco Dorigo, Sebastiana Gianì, Vincenzo Battista, Conor Thomas Fitzpatrick, Tommaso Colombo, Brice Emile Maurin, Ian William Marison, Arnaud Merlin Gauthey, Daniel Gallichan, Marilisa Neri, Michael Thompson McCann, Mai Tu Xuan, Matteo Fontana, Simon Van Mulders, Valérie Jeanne Thérèse Renaudin-Schouler, Severin Stähly, Craig Matthew Smith, Alexandra Bondarenko, Léonard Yannick Maurice Eymann, Adriano Pastore, Nathalie Sophie Adeline Serra, Xiao Yuan, Laia Castilla Amorós, Luc Henry, Juan Federico Esteban Müller, Giovanni Veneziano, Basile Schäli, Nandita Aggarwal, Benedikt Sebastian Braun, Sattar Akbari Nakhjavani, Thomas Jean Julien Fussinger

A binned Dalitz plot analysis of B-+/- -> DK +/- decays, with D -> K-S(0)pi(+)pi(-) and D -> (KSK+K-)-K-0, is used to perform a measurement of the CP-violating observables x(+/-) and y(+/-), which are sensitive to the Cabibbo-Kobayashi-Maskawa angle gamma. ...

Springer Nature2018

Electroweak vacuum stability in the Higgs-Dilaton theory

Andrey Shkerin

We study the stability of the Electroweak (EW) vacuum in a scale-invariant extension of the Standard Model and General Relativity, known as a Higgs-Dilaton theory. The safety of the EW vacuum against possible transition towards another vacuum is a necessar ...

Springer Nature2017

On the dark radiation problem in the axiverse

Anna Tokareva

String scenarios generically predict that we live in a so called axiverse: the Universe with about a hundred of light axion species which are decoupled from the Standard Model particles. However, the axions can couple to the inflaton which leads to their p ...

Iop Publishing Ltd2017

Initial condition for baryogenesis via neutrino oscillation

Shintaro Eijima

We consider a baryogenesis scenario via the oscillation of right-handed neutrinos with Majorana masses of the order of GeV, which are also responsible for neutrino masses by the seesaw mechanism. We study how the initial condition alters the prediction of ...

American Physical Society2017

Combined preheating on the lattice with applications to Higgs inflation

Javier Rubio, Joël Repond

We use classical lattice simulations in 3+1 dimensions to study the interplay between the resonant production of particles during preheating and the subsequent decay of these into a set of secondary species. We choose to work in a simplified version of Hig ...

Iop Publishing Ltd2016

Publications associées (22)

LensWatch. I. Resolved HST Observations and Constraints on the Strongly Lensed Type Ia Supernova 2022qmx ("SN Zwicky")

Frédéric Courbin

IOP Publishing Ltd2023

Search for a vector-like quark T′→ tH via the diphoton decay mode of the Higgs boson in proton-proton collisions at √s=13 TeV

Springer Nature2023