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Publications associées (22)

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

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

Matthias Finger, Konstantin Androsov, Qian Wang, Jan Steggemann, Anna Mascellani, Yiming Li, Varun Sharma, Xin Chen, Rakesh Chawla, Matteo Galli, Jian Wang, João Miguel das Neves Duarte, Tagir Aushev, Matthias Wolf, Yi Zhang, Lei Zhang, Tian Cheng, Yixing Chen, Werner Lustermann, Andromachi Tsirou, Alexis Kalogeropoulos, Andrea Rizzi, Ioannis Papadopoulos, Paolo Ronchese, Hua Zhang, Leonardo Cristella, Siyuan Wang, Tao Huang, David Vannerom, Michele Bianco, Sebastiana Gianì, Sun Hee Kim, Davide Di Croce, Kun Shi, Wei Shi, Abhisek Datta, Jian Zhao, Federica Legger, Gabriele Grosso, Ji Hyun Kim, Donghyun Kim, Zheng Wang, Sanjeev Kumar, Wei Li, Yong Yang, Ajay Kumar, Ashish Sharma, Georgios Anagnostou, Joao Varela, Csaba Hajdu, Muhammad Ahmad, Ekaterina Kuznetsova, Ioannis Evangelou, Muhammad Shoaib, Milos Dordevic, Meng Xiao, Sourav Sen, Xiao Wang, Kai Yi, Jing Li, Rajat Gupta, Muhammad Waqas, Hui Wang, Seungkyu Ha, Pratyush Das, Miao Hu, Anton Petrov, Xin Sun, Valérie Scheurer, Muhammad Ansar Iqbal, Lukas Layer

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, Gabriel Francisco Cuomo, Luca Vecchi

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, Alfredo Glioti, Luca Vecchi

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

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

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

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

Olivier Schneider, Aurelio Bay, Guido Haefeli, Christoph Frei, Tatsuya Nakada, Frédéric Blanc, Michel De Cian, Luca Pescatore, François Fleuret, Chitsanu Khurewathanakul, Alessio Ferrari, Basile Schäli, Elena Graverini, Matthieu Philippe Luther Marinangeli, Greig Alan Cowan, Renato Quagliani, Vladislav Balagura, Federico Betti, Pietro Marino, Mirco Dorigo, Aravindhan Venkateswaran, Sebastiana Gianì, Luis Miguel Garcia Martin, Federico Leo Redi, Vitalii Lisovskyi, Maxime Schubiger, Jian Wang, Mingkui Wang, Guido Andreassi, Zhirui Xu, Violaine Bellée, Preema Rennee Pais, Yi Zhang, Pavol Stefko, Lei Zhang, Tara Nanut, Minh Tâm Tran, Tommaso Colombo, Niko Neufeld, Vladimir Macko, Matthew Needham, Guillaume Max Pietrzyk, Ian William Marison, Marc-Olivier Bettler, Daniel Gallichan, Mai Tu Xuan, Maurizio Martinelli, Severin Stähly, Marilisa Neri, Donal Patrick Hill, Cédric Potterat, Simon Van Mulders, Liang Sun, Alexandra Bondarenko, Michael Thompson McCann, Adriano Pastore, Jean Wicht, Léonard Yannick Maurice Eymann, Nathalie Sophie Adeline Serra, Xiaoxue Han, Matteo Fontana, Liupan An, Laia Castilla Amorós, Luc Henry, Xiao Yuan, Plamen Hristov Hopchev, Nandita Aggarwal, Thibaud Humair, Sattar Akbari Nakhjavani, Valérie Jeanne Thérèse Renaudin-Schouler, Hang Yin, Thomas Jean Julien Fussinger, Juan Federico Esteban Müller, Brice Emile Maurin, Maria Vieites Diaz, Olivier Göran Girard, Craig Matthew Smith, Axel Kuonen, Vincenzo Battista, Maria Elena Stramaglia, Evgenii Shmanin, Dipanwita Dutta, Zheng Wang, Yi Wang, Hans Dijkstra, Gerhard Raven, Peter Clarke, Frédéric Teubert, Giovanni Carboni, Victor Coco, Adam Davis, Paolo Durante, Wenyu Zhang, Yu Zheng, Anton Petrov, Maxim Borisyak, Feng Jiang, Zhipeng Tang

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