BEGIN:VCALENDAR VERSION:2.0 PRODID:-//CERN//INDICO//EN BEGIN:VEVENT SUMMARY:The hiccupping Universe DTSTART;VALUE=DATE-TIME:20190913T121500Z DTEND;VALUE=DATE-TIME:20190913T123000Z DTSTAMP;VALUE=DATE-TIME:20260926T112418Z UID:indico-contribution-2-11@cern.ch DESCRIPTION:Speakers: Dr. TERESI\, Daniele (Università di Pisa)\nWe consi der a scalar field with a bottom-less linear potential\, finding that cosm ologies unavoidably end up with a crunch\, even in scenarios compatible wi th the observed positive cosmological constant. Assuming that rebounces av oid singularities\, this generates a new kind of multiverse: the universe undergoes cycles with different cosmological constants\, all with finite l ifetime regardless of the sign. This novel "temporal" multiverse avoids so me of the usual ambiguities present in the standard "spatial" one. Moreove r\, if a "hiccupping" mechanism changes the vacuum energy by a small amoun t at each cycle\, this dynamics selects a small vacuum energy and becomes the most likely source of universes with anthropically small cosmological constant. Its probability distribution could avoid the gap of 2 orders of magnitude that seems left by standard anthropic selection.\n\nhttp://indi co.fuw.edu.pl/contributionDisplay.py?contribId=11&sessionId=2&confId=59 LOCATION:University of Warsaw 1.40 URL:http://indico.fuw.edu.pl/contributionDisplay.py?contribId=11&sessionId =2&confId=59 END:VEVENT BEGIN:VEVENT SUMMARY:Global fits in the coloured scalar model DTSTART;VALUE=DATE-TIME:20190913T120000Z DTEND;VALUE=DATE-TIME:20190913T121500Z DTSTAMP;VALUE=DATE-TIME:20260926T112418Z UID:indico-contribution-2-20@cern.ch DESCRIPTION:Speakers: MIRALLES\, Victor (IFIC-UV)\nIn this work we study t he phenomenological constraints to the parameter space of scalars carring color quantum numbers. Specifically we constrain the Manohar-Wise model ba sed on the addition of a SU(2) double and SU(3) octet to the minimal Higgs model. The fits are performed using the open source HEPfit package. We in clude both theoretical constraints\, such as unitarity and pertubativity\, and experimental constraints\, like the ones coming from flavour and elec troweak observables. For the first time we combine all these results and w e are able to constrain the parameters of the potential\, the Yukawa coupl ings and the masses of the scalars.\n\nhttp://indico.fuw.edu.pl/contributi onDisplay.py?contribId=20&sessionId=2&confId=59 LOCATION:University of Warsaw 1.40 URL:http://indico.fuw.edu.pl/contributionDisplay.py?contribId=20&sessionId =2&confId=59 END:VEVENT BEGIN:VEVENT SUMMARY:Curved spacetime effective field theory (cEFT) -- formalism and so me applications DTSTART;VALUE=DATE-TIME:20190913T131500Z DTEND;VALUE=DATE-TIME:20190913T133000Z DTSTAMP;VALUE=DATE-TIME:20260926T112418Z UID:indico-contribution-2-23@cern.ch DESCRIPTION:Speakers: Dr. NAKONIECZNY\, Lukasz (Institute of Theoretical P hysics\, Faculty of Physics\, University of Warsaw)\nThe effective field t heory (EFT) turns out to be an instrument of an immense value in all aspec ts of modern particle physics being theory\, phenomenology or experiment. In this talk I will show how to extend the systematic top down approach to construction of the EFT proposed by Hitoshi Murayama (LBL\, Berkeley) and separately by John Ellis (King’s Coll. London) groups to the curved spa cetime. To this end\, I will take advantage of the heat kernel method so f ar extensively used in obtaining the one-loop effective action in curved s pacetime. After an introduction of the formalism I will discuss its applic ation to the problem of an influence of gravity on the stability of the Hi ggs effective potential. The talk is based on JHEP01(2019)034.\n\nhttp://i ndico.fuw.edu.pl/contributionDisplay.py?contribId=23&sessionId=2&confId=59 LOCATION:University of Warsaw 1.40 URL:http://indico.fuw.edu.pl/contributionDisplay.py?contribId=23&sessionId =2&confId=59 END:VEVENT BEGIN:VEVENT SUMMARY:The effective potential method in 5D warped models DTSTART;VALUE=DATE-TIME:20190913T123000Z DTEND;VALUE=DATE-TIME:20190913T124500Z DTSTAMP;VALUE=DATE-TIME:20260926T112418Z UID:indico-contribution-2-57@cern.ch DESCRIPTION:Speakers: Dr. MARTINEZ LIZANA\, Javier (University of Warsaw)\ nWarped extra dimensions have been widely used in the last twenty years to address the hierarchy problem and construct phenomenologically viable BSM models. These models require some mechanism to stabilize the size of the extra dimension\, which usually produces a light radion.\nA common tool u sed to study the stabilization mechanism is the effective potential of the radion and several approximations to it. This object takes a crucial role in finite temperature calculations\, relevant to study possible phase tra nsitions that these models predict in the early universe.\nIn this talk I will discuss different approximations used to compute the effective potent ial. I will analyze their exact meaning\, what trustable information we ca n extract from them\, and under what circumstances they are a good approxi mation to the exact solution.\n\nhttp://indico.fuw.edu.pl/contributionDisp lay.py?contribId=57&sessionId=2&confId=59 LOCATION:University of Warsaw 1.40 URL:http://indico.fuw.edu.pl/contributionDisplay.py?contribId=57&sessionId =2&confId=59 END:VEVENT BEGIN:VEVENT SUMMARY:Multi-peaked Gravitational footprints of neutrino mass and lepton symmetry violation DTSTART;VALUE=DATE-TIME:20190913T124500Z DTEND;VALUE=DATE-TIME:20190913T130000Z DTSTAMP;VALUE=DATE-TIME:20260926T112418Z UID:indico-contribution-2-51@cern.ch DESCRIPTION:Speakers: Dr. MORAIS\, Antonio (Aveiro University)\nWe investi gate the production of primordial Gravitation Waves (GWs) arising from Fir st Order Phase Transitions (FOPT) associated to neutrino mass generation i n the context of type-I seesaw models. We examine both high scale and low scale variants\, with either explicit or spontaneously broken lepton numbe r symmetry. In the latter case\, a pseudo-Goldstone boson\, dubbed Majoron \, may provide a candidate for warm or cold cosmological dark matter. We h ave found that schemes without Majoron lead to either no FOPT or to very w eak FOPT\, precluding the detectability of GWs in present or near future e xperiments. However\, in the presence of Majorons\, one can have strong FO PT and non-trivial GW spectra which can fall well within the frequency and amplitude sensitivity range of upcoming experiments. Furthermore\, we sho w that in certain cases\, the resulting GW spectra entail as characteristi c features double or multiple peaks at the reach of future experiments. Ou r analysis shows that GWs can provide a new and complementary portal to te st the neutrino mass sector.\n\nhttp://indico.fuw.edu.pl/contributionDispl ay.py?contribId=51&sessionId=2&confId=59 LOCATION:University of Warsaw 1.40 URL:http://indico.fuw.edu.pl/contributionDisplay.py?contribId=51&sessionId =2&confId=59 END:VEVENT BEGIN:VEVENT SUMMARY:Stopping the dynamical relaxation by a particle production DTSTART;VALUE=DATE-TIME:20190913T130000Z DTEND;VALUE=DATE-TIME:20190913T131500Z DTSTAMP;VALUE=DATE-TIME:20260926T112418Z UID:indico-contribution-2-62@cern.ch DESCRIPTION:Speakers: Mr. MARKIEWICZ\, Adam (University of Warsaw)\nDynami c relaxation provides an interesting framework which intends to solve the hierarchy problem by postulating\, that the observed value of the electrow eak scale was determined dynamically in the early Universe. Values of the electroweak scale were scanned during an evolution of axion-like field (a relaxion)\, with a stopping mechanism responsible for fixing the scale at a small value. \n\nThe original relaxation proposal depended on an ongoing inflation\, putting significant constraints on the inflationary sector. S ince then alternative variants of relaxation were proposed\, which allow t o decouple it from inflation completely. In these scenarios relaxation is stopped though a burst of particle production which happens when the relax ion enters a non-adiabatic region. \n\nQualitative and analytical approach can tell us a lot about the viability of such relaxation models. It is ho wever still interesting to track the relaxation process in detail\, which can only be done numerically. In this talk we will present our work toward s such analysis done with a goal of investigating a subtle interplay betwe en the relaxion\, the electroweak scale\, and the produced particles.\n\nh ttp://indico.fuw.edu.pl/contributionDisplay.py?contribId=62&sessionId=2&co nfId=59 LOCATION:University of Warsaw 1.40 URL:http://indico.fuw.edu.pl/contributionDisplay.py?contribId=62&sessionId =2&confId=59 END:VEVENT END:VCALENDAR