# Events Archive

Pheno & Vino Seminar, Fiorenza Donato, U of Torino, "Dark matter and the cosmic radiation"
Tue, Apr 19, 2016, 4:00 pm5:30 pm
A viable method for inspecting the presence of Dark Matter particles in our Galaxy is the search for an annihilation signal in the cosmic radiation, and in particular in the rare antimatter fluxes as well as in gamma rays from different regions of sky. We discuss here the recent results from the interpretation of positron and antiproton data…
Pheno & Vino Seminar, Csaba Csaki, Cornell, "Displaced Higgs decays and flavor bounds in twin Higgs models"
Tue, Jan 19, 2016, 4:00 pm5:30 pm
I first examine one of the most interesting potential experimental signals of twin Higgs models, where the ordinary Higgs can decay to long-lived twin sector states, which then in turn decay back to SM states, giving rise to displaced Higgs decays. I will focus on decays in the tracker system, and show that Run I searches already yield some weak…
Pheno & Vino Surjeet Rajendran, Berkeley, "TBA"
Tue, Dec 15, 2015, 4:00 pmTue, Dec 8, 2015, 5:30 pm
TBA

Pheno & Vino Seminar, Surjeet Rajendran, Berkeley, "New Directions in Searching for the Dark Universe"
Tue, Dec 15, 2015, 4:00 pm5:30 pm
In this talk, we discuss ways to search for a wide variety of ultralight bosonic dark matter using precision instruments and probes of ultramassive dark matter using astrophysical probes such as exploding white dwarfs.

Special Pheno & Vino, Clifford Cheung, Caltech, "The Periodic Table of Effective Field Theories"
Mon, Nov 30, 2015, 4:00 pm5:30 pm
The modern S-matrix program has seen immense progress constructing scattering amplitudes in gauge and gravity theories without the aid of a Lagrangian, instead using only physical principles like Lorentz invariance and factorization. In this talk, I discuss how a similar approach is sufficient to construct effective field theories (EFTs),…
Pheno & Vino Seminar, Tien-Tien Yu, Stony Brook U, "Novel Techniques for Detecting sub-GeV Dark Matter"
Tue, Nov 17, 2015, 4:00 pm5:30 pm
Sub-GeV dark matter is a theoretically motivated but largely unexplored paradigm of dark matter. In this talk, I will describe how one can use the scattering of dark matter off of electrons to search for sub-GeV dark matter. I will present some motivated models that can be probed with these techniques as well as projections for current and near…
Pheno & Vino, Gordon Krnjaic, Perimeter, "Discovering Inelastic Thermal-Relic Dark Matter at Colliders"
Tue, Nov 10, 2015, 4:00 pm5:30 pm
Dark Matter particles with inelastic interactions are ubiquitous in extensions of the Standard Model, yet remain challenging to fully probe with existing strategies. We propose a series of powerful searches at hadron and lepton colliders that are sensitive to inelastic dark matter dynamics. In representative models featuring either a massive dark…
Pheno & Vino Seminar, Marco Farina, Cornell, "Asymmetric Twin Dark Matter"
Tue, Oct 27, 2015, 4:00 pm5:30 pm
Can the Asymmetric Dark Matter paradigm be naturally implemented in Twin Higgs models? The mirroring of the Standard Model strong sector suggests that a twin baryon with mass around 5 GeV is a natural dark matter candidate once a twin baryon number asymmetry comparable to the SM asymmetry is generated. The salient features will be discussed,…
Pheno & Vino, Prashant Saraswat, U.MD & Hopkins, "Towards a No-Lose Theorem for Naturalness "
Tue, Oct 20, 2015, 4:00 pm5:30 pm
We derive a phenomenological "no-lose" theorem for naturalness up to the TeV scale, which applies when quantum corrections to the Higgs mass are canceled by perturbative BSM particles (top partners) due to to some symmetry. In particular we focus on neutral top partner scenarios such as Twin Higgs. We classify all perturbative neutral top partner…
Pheno & Vino Seminar, Yoni Kahn, Princeton U., "The Goldstone and Goldstino of Supersymmetric Inflation"
Tue, Oct 6, 2015, 4:00 pm5:30 pm
I construct an effective field theory (EFT) for the minimal degrees of freedom of supersymmetric inflation. These can be viewed as the goldstone of spontaneously broken time translations, and the goldstino of spontaneously broken SUSY, both of which are tied together in an interesting way through the structure of the SUSY algebra. I briefly…
Pheno & Vino Seminar, Duccio Pappadopulo, NYU, "Collider signatures from Freeze-in"
Tue, Sep 29, 2015, 4:00 pm5:30 pm
Dark matter may be generated by new physics at the TeV scale during an early matter dominated era that ends at temperature much below the TeV scale. Compared to conventional radiation dominated results, yields from both Freeze-Out and Freeze-In processes are greatly suppressed by dilution from entropy production, making Freeze-Out less plausible…
Pheno & Vino Seminar, Matthew Low, IAS, "Composite Spin-1 Resonances at the LHC"
Tue, Sep 22, 2015, 4:00 pm5:30 pm
Composite spin-1 resonances are a universal feature of composite Higgs models. In this talk, I will discuss the phenomenology of such resonances at the LHC, motivated by the possible observation of a diboson resonance in the 8 TeV LHC data. Particular attention is paid to the role played by fermion partial compositeness which is an important…
Particle Physics Seminar, Ben Safdi, MIT, "The Fermi GeV excess: annihilating dark matter or millisecond pulsars?"
Thu, May 14, 2015, 4:00 pm5:30 pm
Data from the Fermi Large Area Telescope suggests that there is an extended excess of GeV gamma-ray photons in the Inner Galaxy. Identifying potential astrophysical sources that contribute to this excess is an important step in verifying whether the signal originates from annihilating dark matter. I will show that the statistics of the photons…
Particle Physics Seminar, David Curtin, U. of Maryland, "Probing Colorless Naturalness"
Mon, May 11, 2015, 4:00 pm5:30 pm
Theories of uncolored naturalness solve the (little) hierarchy problem without colored top partners, avoiding stringent LHC bounds. I will classify these theories by the physical properties of their top partners to derive the minimal experimental signatures required for a natural solution to the little Hierarchy problem. All so-far proposed…
Particle Physics Seminar, Sonia El Hedri, U. of Mainz, "Perturbative Unitarity Constraints on Dark Sectors"
Fri, May 1, 2015, 4:00 pm5:30 pm
We describe a method that uses perturbative unitarity constraints to find the characteristic energy scales in theories of thermal Dark Matter. We apply this method to three Dark Matter portals: the NMSSM Higgs sector, a Z' model with a dark Higgs, and a squark simplified model, and derive the projected constraints from ton-scale Direct Detection…
Particle Physics Seminar, Eric Kuflik, Cornell, "TBA"
Fri, Apr 17, 2015, 4:00 pm5:30 pm
TBA

Particle Physics Seminar, Illias Cholis, FNAL, "WIMP ante portas? The Fermi galactic center excess."
Fri, Apr 10, 2015, 4:00 pm5:00 pm
The possible gamma-ray excess in the inner Galaxy and the Galactic center suggested by Fermi-LAT observations has triggered great interest in the community. Among its various interpretations have been WIMP dark matter annihilations, gamma-ray emission from a population of millisecond pulsars, or emission from cosmic rays injected in a sequence…
Particle Physics Seminar, Jeremy Mardon, Stanford, "Ultra light vectors -- a journey from inflation to the lab"
Fri, Apr 3, 2015, 4:00 pm5:30 pm
A light vector field can have interesting cosmology and phenomenology. I will trace the vector's cosmological history from inflation, where it is fluctuated into existence, to the universe today, where it takes the form of cold relic matter, and finally to lab experiments searching for this unusual relic.

Particle Physics Seminar, Spencer Chang, U. of Oregon, "Phenomenology of Induced Electroweak Symmetry Breaking"
Fri, Mar 27, 2015, 4:00 pm5:30 pm
In this talk, I will discuss scenarios of induced electroweak symmetry breaking (EWSB), where the Higgs vev is induced by another EWSB source. These additional sources can be due to another Higgs vev or technicolor sector and can mitigate constraints on beyond the Standard Model theories (eg. raising the Higgs mass in supersymmetric models). I…
Special Particle Physics Seminar, Daniel Whiteson, UC Irvine, "Observing Ultra-High Energy Cosmic Rays with Smartphones"
Tue, Mar 10, 2015, 3:00 pm4:30 pm
We propose a novel approach for observing cosmic rays at ultra-high energy ($>10^{18}$~eV) by repurposing the existing network of smartphones as a ground detector array. Extensive air showers generated by cosmic rays produce muons and high-energy photons, which can be detected by the CMOS sensors of smartphone cameras. The small size and low…