Conveners
Dark Matter I
- Can Kilic (University of Texas at Austin)
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James Osborne (University of Wisconsin - Madison)04/05/2015, 14:00parallel talkWe study the collider constraints on chromo-Rayleigh interactions of dark matter. Here we present the results of an effective operator analysis and compare collider and direction detection constraints. For dark matter masses of order 100 GeV the constraints from monojet searches are relatively weak, questioning the applicability of the effective operator description. Thus, we also present...Go to contribution page
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Dr Natsumi Nagata (University of Minnesota)04/05/2015, 14:15parallel talkWe complete the calculation of the wino-nucleon scattering cross section up to the next-to-leading order in αs. We assume that the other sparticles are decoupled and wino interacts with the Standard Model particles via the weak interaction. As a result, the uncertainties coming from the perturbative QCD are significantly reduced to be smaller than those from the nucleon matrix elements. The...Go to contribution page
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Chris Newby04/05/2015, 14:30parallel talkWe present a model independent approach for low-energy scattering of inelastic dark matter. We find the relevant nonrelativistic variables which describe these processes are very similar to the operators discussed by Fitzpatrick *et at* with the modification of the $v^\perp$ variable. Taking this into account, we list the relevant matrix elements and modify the *Mathematica* package of Anand...Go to contribution page
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Gregory Barello (University of Oregon)04/05/2015, 14:45parallel talkAs an application of the model independent approach to analyzing inelastic dark matter direct detection, as detailed in arxiv: 1409.0536, I will discuss fits to the DAMA annual modulation signal, and corresponding constraints from other direct detection experiments. It is particularly interesting what this tells us about the sensitivity of constraints to uncertainty in detector...Go to contribution page
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Siddharth Mishra Sharma (Princeton University (US))04/05/2015, 15:00parallel talkOne of the next frontiers in dark-matter direct-detection experiments is to explore the MeV to GeV mass regime. Such light dark matter does not carry enough kinetic energy to produce an observable nuclear recoil, but it can scatter off atomic electrons, ionizing the target atom and leading to a measurable signal. We introduce a semi-analytic approach to characterize the resulting...Go to contribution page
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Andrea Massari (Stony Brook University)04/05/2015, 15:15parallel talkThe Fermi $\gamma$-ray Space Telescope has observed the sky since 2008. Dark matter annihilations or decays contribute to the measured diffuse $\gamma$-ray background flux. Using simulated data to first find the “optimal” regions of interest in the $\gamma$-ray sky, we present conservative bounds on annihilation cross section or decay lifetime competitive with other existing limits. We...Go to contribution page
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Colburn Russell (The Ohio State University)04/05/2015, 15:30parallel talkIn indirect dark matter searches, the current status quo in presenting limits is to quote the simplest assumption of annihilation rates wherein there is one annihilation channel. We will discuss using a triangle based visualization that extends beyond this, allowing for constraints on dark matter mass to be shown for a more realistic assumption of multiple annihilation channels being open. ...Go to contribution page
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Timothy Wiser (Stanford University)04/05/2015, 15:45parallel talkMerging galaxy clusters such as the Bullet Cluster provide a powerful testing ground for indirect detection of dark matter. The spatial distribution of the dark matter is both directly measurable through gravitational lensing and substantially different from the distribution of potential astrophysical backgrounds. We propose to use this spatial information to identify the origin of indirect...Go to contribution page