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mini-workshop on BSM at ILC

28 February 2022 to 2 March 2022
Europe/Zurich timezone

Contribution List

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  1. 12. Next-to-leading-order corrections to the e+e- → hZ process in extended Higgs models
    Mr Masashi Aiko (Osaka University)
    28/02/2022, 07:00

    Precision measurements of the properties of the discovered Higgs boson are one of the main programs at current and future collider experiments. At the international linear collider with the center-of-mass energy 250 GeV, e+e- → hZ is the dominant Higgs production process, and the cross section would be measured with a few percent accuracies. In this talk, we present the cross section of the...

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  2. 13. The search for Leptophilic dark matter and (g-2)_mu at future lepton colliders
    Taisuke Katayose (Osaka University)
    28/02/2022, 07:20

    We consider the renormalizable leptophilic WIMP models with the scalar mediators which have lepton numbers. We perform a comprehensive analysis for such a WIMP scenario for two distinct cases with SU(2) doublet or singlet mediators considering all the relevant theoretical, cosmological and experimental constraints at present. We show that mono-photon search at ILC experiment can play a...

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  3. 5. Alternative searches of quintuplet fermions at ILC
    Nilanjana Kumar (CCSP, SGT University, India)
    28/02/2022, 07:40

    Large fermionic multiplets appear in different extensions of the Standard Model, which are essential to predict small neutrino masses, relic abundance of the dark matter and the measured value of muon anomalous magnetic moment. Such models may contain quintuplet of fermions along with scalar multiplets. If the quintuplet fermions (doubly and singly charged fermions, neutral fermion) are...

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  4. 15. Muon g-2 in SUSY and future lepton colliders
    Ipsita Saha (Kavli IPMU)
    28/02/2022, 08:00
  5. 14. Stau Searches at the ILC
    María Teresa Núñez Pardo de Vera (DESY)
    28/02/2022, 15:00

    "The direct pair-production of the tau-lepton superpartner, stau, is one
    of the most interesting channels to search for SUSY. First of all the stau is
    with high probability the lightest of the scalar leptons. Secondly the
    signature of stau pair production signal events is one of the most difficult
    ones, yielding to the 'worst' and so most global scenario for the searches.
    The current...

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  6. 6. Dark matter production with light mediator exchange at future e+e- colliders
    Aleksander Filip Zarnecki (University of Warsaw)
    28/02/2022, 15:20

    One of the primary goals of the proposed future collider experiments is to search for dark matter (DM) particles using different experimental approaches. High energy e+e- colliders offer unique possibility for the most general search based on the mono-photon signature. As any e+e- scattering process can be accompanied by a hard photon emission from the initial state radiation, analysis of the...

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  7. 9. Measuring neutrino dynamics via light higgsinos and sneutrinos
    Harri Waltari (University of Uppsala)
    28/02/2022, 15:40

    Supersymmetry offers a portal to study neutrino physics via sneutrinos. I shall discuss a signature that can be only detected at an electron-positron collider, namely the production of a charged higgsino pair, one of them subsequently decaying to a charged lepton and a right-sneutrino LSP. This decay is rare, with a branching ratio O(10^-5) and hence the clean environment and fixed partonic...

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  8. 4. Heavy Neutrinos at Future Linear e+e- Colliders
    Krzysztof Mekala
    28/02/2022, 16:00

    Neutrinos are probably the most mysterious particles of the Standard Model. The mass hierarchy and oscillations, as well as the nature of their antiparticles, are currently being studied in experiments around the world. Moreover, in many models of New Physics, baryon asymmetry or dark matter density in the universe are explained by introducing new species of neutrinos. Among others, heavy...

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  9. 22. BSM Higgs bosons
    Sven Heinemeyer
    28/02/2022, 16:20
  10. 16. Light leptonic forces for (g-2) and B-anomalies
    Seong Chan Park (Yonsei University)
    02/03/2022, 07:00
  11. 17. Stau study at the ILC and its implication for the muon g－2 anomaly
    Shin-ichi Kawada (KEK)
    02/03/2022, 07:20
  12. 18. Search for Higgs decaying to exotic scalers at the ILC
    Yu Kato (University of Tokyo)
    02/03/2022, 07:40
  13. 7. Testability of CP-even axion-like particle at ILC
    Kodai Sakurai (Tohoku University)
    02/03/2022, 08:00

    Axion and axion-like particles (ALPs) are attractive candidates of light dark matter (DM). They emerge as a pseudo-Nambu Goldstone boson in spontaneously breaking of global U(1) symmetry in the dark sector. The mass is obtained by the explicit breaking of the U(1). In many new physics models, it is usually assumed that the dark sector, in which axion/ALP exists, is CP conserving. In contrast...

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  14. 21. Sensitivity for Long-Lived particles at FCC-ee
    Juliette Alimena (CERN)
    02/03/2022, 15:00
  15. 20. Sensitivity to Decays of Long-Lived Dark Photons at the ILC
    Laura Nosler (University of Oregon)
    02/03/2022, 15:20
  16. 8. Low mass scalars at e+e- colliders
    Tania Natalie Robens (Rudjer Boskovic Institute (HR))
    02/03/2022, 15:40

    I report on studies and possible BSM scenarios with (Higgs) scalars of masses < 125 GeV. This talk is based on similar overview talks at the CEPC/ FCC workshops within the last half year, and is tailored be used as a foundation for a Snowmass White Paper on this topic.

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  17. 11. Phenomenology of dark matter in complex scalar singlet extensions of Two Higgs doublet models
    Juhi Dutta
    02/03/2022, 16:00

    Extensions of the two Higgs doublet models with a singlet scalar can easily accommodate all current experimental constraints and are highly motivated candidates for Beyond Standard Model Physics. It can successfully provide a dark matter candidate, explain baryogenesis and provide gravitational wave signals. In this work, we focus on the dark matter phenomenology of the two Higgs doublet model...

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  18. 2. Testing the neutrino mass generation mechanism at the future colliders
    Arindam Das
    02/03/2022, 22:00

    The generation of the neutrino mass is an essential observation from the neutrino oscillation experiments. This indicates a major revision of the Standard Model which initiated with the massless neutrinos. A possible interesting scenario is the seesaw mechanism where SM gauge singlet Right Handed Neutrinos are introduced. Another interesting aspect is the extension of the SM with SU$(2)_𝐿$...

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  19. 19. Probing U(1) extended Standard Models at ILC
    Nobuchika Okada (University of Alabama)
    02/03/2022, 22:20
  20. 3. The string landscape predicts: light higgsinos at ILC
    Howard Baer (University of Oklahoma)
    02/03/2022, 22:40

    Our current understanding of string theory is that the 4-d laws of physics are determined by the topological properties of the compactified manifold. There may be 10^500 (or many more) possibilities, and indeed this gives at present our only understanding of the tiny yet non-zero value of the cosmological constant. Arguments suggest the landscape of string vacua favor large soft SUSY breaking...

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  21. 10. A Theory of Dark Pions
    LINGFENG LI
    02/03/2022, 23:00

    We present a complete model of a dark QCD sector with light dark pions, broadly motivated by hidden naturalness arguments. The dark quarks couple to the Standard Model via irrelevant $Z$- and Higgs-portal operators, which encode the low-energy effects of TeV-scale fermions interacting through Yukawa couplings with the Higgs field. The dark pions, depending on their $CP$ properties, behave as...

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