COMPOSE-IT: Unitarity for composite models and beyond in the HL-LHC era

Europe/Rome
Aula F (Dipartimento di Fisica e Geologia, Università degli Studi di Perugia)

Aula F

Dipartimento di Fisica e Geologia, Università degli Studi di Perugia

Via A. Pascoli, Perugia
Valentina Mariani (PG), Simone Biondini (Albert Einstein Center, Institute for Theoretical Physics - Uni Bern), Patrizia Azzi (PD), Orlando Panella (PG), Matteo Presilla (PD), Livio Fano' (PG)
Description

The workshop has the goal to bring together theorists and experimentalists  working actively in the field of fermion composite models and the effective interactions of the hypothetical excited states with the ordinary SM particles. We shall focus on the issue of perturbative unitarity, which has been overlooked in these models, and assess its impact in the related experimental searches.

We plan to discuss such effective models, and possibly affine ones, in connection with the Run III of the LHC and of its forthcoming High-Luminosity and High-Energy options  with respect to possible signatures not yet covered and/or due to new exotic states. 

Organizing Committee: 

Patrizia Azzi (CMS), Simone Biondini, Livio Fanò (CMS), Valentina Mariani (CMS), Orlando Panella, Matteo Presilla (CMS)

 

Registration
COMPOSE-IT: Registration form
Participants
  • Alberto Orso Maria Iorio
  • Alberto Zucchetta
  • Alessandro Rossi
  • Andrea Piccinelli
  • Antonio Costantini
  • Antonio Sidoti
  • Davide Meloni
  • Enrico Morgante
  • Francesco Cirotto
  • Giulia Pancheri
  • LIVIA SOFFI
  • Livio Fano'
  • Maria Herrero
  • Mario E. Gómez
  • Matteo Presilla
  • Mia Tosi
  • Monica Verducci
  • Muhammad Rehman
  • Orlando Panella
  • Patrizia Azzi
  • Roberto A. Morales
  • Roberto Leonardi
  • She-Sheng Xue
  • Simone Biondini
  • Tommaso Tedeschi
  • Valentina Mariani
  • Yogendra Srivastava
  • Monday, 27 January
    • 10:00 10:40
      Review on composite models of excited leptons 40m Aula F

      Aula F

      Dipartimento di Fisica e Geologia, Università degli Studi di Perugia

      Via A. Pascoli, Perugia
      Speaker: Orlando Panella (PG)
    • 10:40 11:20
      Perturbative unitarity bounds for effective composite models 40m Aula F

      Aula F

      Dipartimento di Fisica e Geologia, Università degli Studi di Perugia

      Via A. Pascoli, Perugia
      Speaker: Matteo Presilla (PD)
    • 11:20 11:35
      Coffee break 15m Aula F

      Aula F

      Dipartimento di Fisica e Geologia, Università degli Studi di Perugia

      Via A. Pascoli, Perugia
    • 11:35 12:15
      Phenomenology at the LHC of composite particles from strongly interacting Standard Model fermions via four-fermion operators of NJL type 40m Aula F

      Aula F

      Dipartimento di Fisica e Geologia, Università degli Studi di Perugia

      Via A. Pascoli, Perugia
      Speaker: She-Sheng Xue
    • 12:15 12:55
      EFT approach in Dark Matter searches 40m Aula F

      Aula F

      Dipartimento di Fisica e Geologia, Università degli Studi di Perugia

      Via A. Pascoli, Perugia
      Speaker: Morgante Enrico
    • 12:55 13:55
      Lunch 1h Aula F

      Aula F

      Dipartimento di Fisica e Geologia, Università degli Studi di Perugia

      Via A. Pascoli, Perugia
    • 13:55 14:35
      Composite Majorana neutrinos and leptogenesis 40m Aula F

      Aula F

      Dipartimento di Fisica e Geologia, Università degli Studi di Perugia

      Via A. Pascoli, Perugia
      Speaker: Simone Biondini (Albert Einstein Center, Institute for Theoretical Physics - Uni Bern)
    • 14:35 15:15
      Unitarization effects in EFT predictions of VBS at the LHC 40m Aula F

      Aula F

      Dipartimento di Fisica e Geologia, Università degli Studi di Perugia

      Via A. Pascoli, Perugia

      Effective field theories are an incredibly powerful tool in order to study and understand the true nature of the symmetry breaking sector dynamics of the Standard Model. However, they can suffer from some theoretical problems such as that of unitarity violation. Nevertheless, in order to interpret experimental data correctly a fully unitary prescription is needed. To this purpose, unitarization methods are addressed, but each of them leads to a different (unitary) prediction. Because of this, there is an inherent theoretical uncertainty in the determination of the effective field theory parameters due to the choice of one unitarization scheme.
      In this talk, I will present this uncertainty assuming a strongly interacting electroweak symmetry breaking sector, described by the effective electroweak chiral Lagrangian (or Higgs effective field theory). In particular, I focus on the WZ scattering as the main VBS channel to study the sensitivity to new physics at the LHC. Using various well known unitarization methods, I will show the different predictions at subprocess level, considering the full coupled system of helicity amplitudes. Then I will present the current experimental constraints and how the different predictions manifest in the pp collisions at the LHC. Finally, I will show the corresponding 95% C.L. exclusion regions for the most relevant electroweak chiral Lagrangian parameters involved in the WZ scattering depending on the unitarization method applied.

      Speaker: Roberto Morales (Instituto de Física Teórica de Madrid (UAM-CSIC))
    • 15:15 15:55
      Unitarity Constraints in BSM: new results in the 331 Models 40m Aula F

      Aula F

      Dipartimento di Fisica e Geologia, Università degli Studi di Perugia

      Via A. Pascoli, Perugia

      We discuss the main features of the scalar sector of a class of BSM models with enlarged gauge symmetry, the so called 331 Models. The theoretical constraints on the scalar potential such as unitarity, perturbativity and boundedness-from-below, are presented. These results are based on a very-recent analysis that is suitable to be used in phenomenological studies for the exotic scenarios predicted by the 331 Models.

      Speaker: Antonio Costantini (Istituto Nazionale di Fisica Nucleare)
    • 15:55 16:10
      Coffee break 15m Aula F

      Aula F

      Dipartimento di Fisica e Geologia, Università degli Studi di Perugia

      Via A. Pascoli, Perugia
    • 16:10 16:50
      Review on exotic physics in CMS 40m Aula F

      Aula F

      Dipartimento di Fisica e Geologia, Università degli Studi di Perugia

      Via A. Pascoli, Perugia

      Results from Run 2 and perspective for Run 3

      Speaker: LIVIA SOFFI (ROMA1)
    • 16:50 17:30
      Review on exotic physics ATLAS 40m Aula F

      Aula F

      Dipartimento di Fisica e Geologia, Università degli Studi di Perugia

      Via A. Pascoli, Perugia

      Results from Run 2 and perspective for Run 3

      Speaker: Monica Verducci (ROMA3)
    • 20:00 23:00
      Social dinner 3h
  • Tuesday, 28 January
    • 09:00 09:40
      Excited lepton triplet contribution to electroweak observables at one loop level (TBC) 40m Aula F

      Aula F

      Dipartimento di Fisica e Geologia, Università degli Studi di Perugia

      Via A. Pascoli, Perugia
      Speakers: Mario Gomez (Univesidad de Huelva), Muhammad Rehman (Comsats University Islamabad)
    • 09:40 10:20
      Present status of LHC and perspectives for Run3 and HL 40m Aula F

      Aula F

      Dipartimento di Fisica e Geologia, Università degli Studi di Perugia

      Via A. Pascoli, Perugia

      Evolution of triggers and data analysis tools

      Speaker: mia tosi (Universita' degli Studi di Padova)
    • 10:20 11:00
      Overview on SM and BSM top quark 40m Aula F

      Aula F

      Dipartimento di Fisica e Geologia, Università degli Studi di Perugia

      Via A. Pascoli, Perugia
      Speaker: Alberto Orso Maria Iorio (NA)
    • 11:00 11:15
      Coffee break 15m Aula F

      Aula F

      Dipartimento di Fisica e Geologia, Università degli Studi di Perugia

      Via A. Pascoli, Perugia
    • 11:15 11:55
      Review on diboson searches in CMS 40m Aula F

      Aula F

      Dipartimento di Fisica e Geologia, Università degli Studi di Perugia

      Via A. Pascoli, Perugia
      Speaker: Alberto Zucchetta (PD)
    • 11:55 12:35
      Search in ATLAS for excited letpon and dilepton high mass 40m Aula F

      Aula F

      Dipartimento di Fisica e Geologia, Università degli Studi di Perugia

      Via A. Pascoli, Perugia
      Speaker: Antonio Sidoti (BO)
    • 12:35 13:15
      Diboson search in ATLAS 40m Aula F

      Aula F

      Dipartimento di Fisica e Geologia, Università degli Studi di Perugia

      Via A. Pascoli, Perugia
      Speaker: Francesco Cirotto (NA)
    • 13:15 14:15
      Lunch 1h Aula F

      Aula F

      Dipartimento di Fisica e Geologia, Università degli Studi di Perugia

      Via A. Pascoli, Perugia
    • 14:15 17:15
      Discussion: Discussion and document preparation Aula F

      Aula F

      Dipartimento di Fisica e Geologia, Università degli Studi di Perugia

      Via A. Pascoli, Perugia