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Yasuhito Sakaki (KEK)25/05/2022, 09:00
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Ruth Schäfer25/05/2022, 09:30
In this talk, I will explore the discovery potential for long-lived particles at the 250-GeV ILC. I will discuss possible gains of a dedicated far detector over the main detector for sub-GeV axion-like particles a, produced via e+ e− → aγ or e+ e− → Zγ → (aγ)γ and decaying into pairs of charged leptons. Our conclusions can also help optimizing long-lived particle searches at the FCC-ee and...
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Daiki Ueda25/05/2022, 09:50
We study capability of the ILC beam dump experiment to search for dark matter particles, comparing the performance of the electron and positron beam dumps. The dark matter particles involving the dark photon are considered as benchmark models, where electron recoil processes and decays of heavier dark matter particles are included as signal events.
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We find that the ILC beam dump experiment... -
Yoshiki Kanazawa (University of Tokyo)25/05/2022, 10:10
We consider a possibility to observe the axion emission from a nearby supernova (SN) in the future, which can be known in advance by the pre-SN alert system, by collider detectors like the LHC detectors (i.e., the ATLAS and the CMS) and the ILC detectors (i.e., the ILD and SiD). The axion from the SN can be converted to the photon by the strong magnetic field in the detector and the photon...
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Tania Natalie Robens25/05/2022, 11:00
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Theodota Lagouri (Instituto De Alta Investigación - Universidad de Tarapacá (CL))25/05/2022, 11:30
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Agni Bethani (University of Maryland (US))25/05/2022, 12:00
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Sven Heinemeyer (CSIC (Madrid, ES))25/05/2022, 12:30
I will review possible evidences for a light Higgs boson. Based on the experimental data the possibilities to test such a BSM Higgs scenario at future e+e- colliders will be discussed.
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Francois Richard25/05/2022, 14:00
The SM Higgs discovery has relied on the following ingredients:
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An “effective theory”, the SM, which predicted the mass and the couplings of the Higgs particle
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A > 5 s.d. evidence of signals coincidentally observed by ATLAS and CMS for this particle (FNAL started with a ~3 s.d. indication)
The dominant phenomenological framework remains MSSM but, in absence of evidence for...
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Yongchao Zhang (Southeast University)25/05/2022, 14:30
A light CP-even scalar is very common in the beyond SM physics. It can be searched at the high-energy colliders or high-intensity experiments via long-lived particles or flavor signals, for instance future $e^+ e^-$ colliders, FASER and DUNE. The signatures might depend on the underlying theories. If sufficiently light, a scalar can also be produced copiously in supernovae, neutron stars, the...
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wei su (university of Adelaide)25/05/2022, 14:50
We perform comparative studies for four types of the two Higgs Doublet Models (2HDMs) under the precision measurements of the Standard Model (SM) Higgs observables at the proposed Higgs factories. The exploration for the discovery potential is up to one-loop level. We find 5σ observability from the global fitting in a significant theory parameter space at future Higgs factories. We also...
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Ke-Pan Xie25/05/2022, 15:10
An essential goal of the Higgs physics program at the LHC and beyond is to explore the nature of the Higgs potential and shed light on the mechanism of electroweak symmetry breaking. An important class of models defining the strength and order of the electroweak phase transition is driven by the Higgs boson coupling to a light new state. This Snowmass white paper points out the existence of a...
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Shufang Su (University of Arizona)25/05/2022, 16:00
Two Higgs Doublet Models (2HDM) provide a simple framework for new physics models with an extended Higgs sector. The current LHC results, including both direct searches for additional non-Standard Model (SM) Higgs bosons, as well as precision measurements of the SM-like Higgs couplings, already provide strong constraints on the 2HDM parameter spaces. In this paper, we examine those constraints...
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Jan Franciszek Klamka (University of Warsaw (PL))25/05/2022, 16:20
The Inert Doublet Model (IDM) is one of the simplest SM extensions and introduces four new scalar particles: H$^\pm$, A and H; the lightest, H, is stable and hence a natural dark matter (DM) candidate. A set of benchmark points has been proposed, which are consistent with theoretical and experimental constraints and promise detectable signals at future colliders. Prospects for observing pair...
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Triparno Bandyopadhyay25/05/2022, 16:40
Axion-like particles (ALPs) are at the forefront of physics research, especially at the intensity frontier, dealing with light weakly coupled particles. A plethora of different experiments search for signals of the ALP in many different final states using innovative search strategies. We present a different perspective on ALP searches, concentrating on the modifications that such a particle...
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Dr Emidio Gabrielli (Nat. Inst. of Chem.Phys. & Biophys. (EE))25/05/2022, 17:00
We analyze the Z-boson decay $Z \to \gamma ~ X$ into a photon ($\gamma$) plus a hypothetical light boson (X) belonging to a dark or secluded sector. The dark boson is assumed to behave as missing energy in the detector. We consider for X the cases of spin-1 (massless dark-photon), spin-0 (axion-like), and spin-2 (graviton-like) particles and explore the way to untangle its spin origin. All...
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Giacomo CACCIAPAGLIA25/05/2022, 17:20
The Tera-Z phase of future e+e− colliders, FCC-ee and CepC, is a goldmine for exploring Z portal physics. We focus on axion-like particles (ALPs) that can be produced via Z decays with a monochromatic photon. As a template model, we consider composite Higgs models with a light pseudo-scalar that couples through the Wess-Zumino-Witten term to the electroweak gauge bosons. For both photophilic...
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Rebeca Gonzalez Suarez (Uppsala University (SE)), Roberto Franceschini (Rome 3 U.), Aleksander Filip Zarnecki (University of Warsaw (PL))25/05/2022, 17:40
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