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Ryan Reece (University of Pennsylvania)15/08/2013, 08:30Physics Beyond the Standard Modeloral presentation"The LHC has brought a new level of sensitivity to TeV-scale new physics. Tau leptons can have preferred couplings to possible new physics, including Z' bosons motivated by grand unified theories. Hadronic tau decays are one of the most difficult final states to identify at hadron colliders like the LHC. ATLAS has multivariate techniques for identifying hadronic tau decays using Boosted...Go to contribution page
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Dr Joseph Virzi (Lawrence Berkeley National Laboratory)15/08/2013, 08:50Physics Beyond the Standard Modeloral presentationWe search for the pair production of a new heavy quark, assuming the new quark has a significant branching ratio to decay into a Z boson and a Standard Model top (t) or bottom (b) quark. For a new bottom-like quark B, we focus on the decay channel B \rightarrow Zb; for a new top-like quark T, we target the decay channel T \rightarrow Zt. The search uses a dataset corresponding to 14.3...Go to contribution page
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Saptaparna Bhattacharya (Brown University)15/08/2013, 09:10Physics Beyond the Standard Modeloral presentationWe present searches for massive top and bottom quark partners at CMS using data collected at sqrt(s)=7 and 8 TeV. Such partners can be seen in 4th generation models, or can be found in models predicting vector-like quarks to solve the Hierarchy problem and stabilize the Higgs mass. The searches span a range of final states, from multi-leptonic to entirely hadronic, and limits are set on mass...Go to contribution page
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Pramod Lamichhane (Wayne State University)15/08/2013, 10:30Physics Beyond the Standard Modeloral presentationWe report a search for contact interactions due to quark and lepton substructure manifest in production of ยต+ ยต- and e+e- pairs. The search is performed using the full data set recorded by CMS at โs = 8 TeV corresponding to integrated luminosity of 20.6 fb-1 for dimuons and 19.6 fb-1 for dielectrons. The dilepton yields for invariant masses above 300 GeV are found to be consistent with...Go to contribution page
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Dr Mark Cooke (LBNL)15/08/2013, 10:50Physics Beyond the Standard Modeloral presentationDespite observations by the ATLAS and CMS experiments of a new particle consistent with the Standard Model Higgs boson, the mechanism of electroweak symmetry breaking remains undetermined. Further, the question of naturalness remains open. Supersymmetry provides elegant insights into these problems, but so far no evidence of such signals has been found. An alternative class of models are...Go to contribution page
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Claudia Seitz (Rutgers University)15/08/2013, 11:10Physics Beyond the Standard Modeloral presentationA search for three-jet hadronic resonance production in pp collisions at a center-of-mass energy of 8 TeV using 19.5/fb of data collected by the CMS experiment in 2012 is presented. The search method is model-independent for events with high jet multiplicity and large sum jet pT; however, event selection is optimized using an R-parity-violating supersymmetric model with gluino pair production...Go to contribution page
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Steven Farrell (University of California Irvine)15/08/2013, 13:30Physics Beyond the Standard Modeloral presentationSupersymmetry offers an elegant solution to the hierarchy problem and can provide a candidate for dark matter. As the limits on squark and gluino masses are pushed beyond the TeV range, direct production of charginos and neutralinos can become the dominant sparticle production at the LHC. Also, light charginos and neutralinos are favored in "Natural SUSY" models with small fine-tuning of the...Go to contribution page
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Mr Brett Jackson (University of Pennsylvania)15/08/2013, 13:50Physics Beyond the Standard Modeloral presentationThe search for the electroweak production of supersymmetric particles decaying into final states containing two leptons and missing energy was performed using the full 8 TeV dataset of proton-proton collisions recorded using the ATLAS experiment. The scenarios considered in this analysis were the production of two gauginos and slepton pair production. In both of these scenarios, the...Go to contribution page
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Xiaowen Lei (University of Arizona)15/08/2013, 14:10Physics Beyond the Standard Modeloral presentationA search is presented for exotic processes that result in final states containing jets including at least one b jet, sizable missing transverse momentum, and a pair of leptons with the same electric charge. There are several models that predict an enhanced rate of production of such events beyond the expectations of the Standard Model. The ones considered here are pair production of chiral b'...Go to contribution page
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Mr Ryan Kelley (University of California, San Diego)15/08/2013, 14:30Physics Beyond the Standard Modeloral presentationA search for new physics is performed using events with same-sign isolated leptons and jets in the final state. The results are based on the full sample of proton-proton collisions at a center-of-mass energy of 8 TeV with the CMS detector and corresponding to an integrated luminosity of 19.5 fb-1. In order to be sensitive to a wide variety of possible signals beyond the Standard Model, we...Go to contribution page
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Mr Angelo Monteux (UCSC)15/08/2013, 14:50Physics Beyond the Standard Modeloral presentationMotivated by null LHC searches for R-parity conserving SUSY, I will present the general structure of RPV couplings in presence of a Froggatt-Nielsen horizontal symmetry. For sub-TeV SUSY, lepton number must be an accidental symmetry, while baryonic RPV allows natural low-energy SUSY. The upper limit for the magnitude of the largest RPV coupling is 10^{-3} (from dinucleon decay) while the...Go to contribution page
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Michael Hance (LBNL)15/08/2013, 15:10Physics Beyond the Standard Modeloral presentationA model independent search for new physics in multilepton final states is presented using 20 inverse femtobarns of proton-proton collisions at a center-of-mass energy of 8 TeV collected by the ATLAS experiment at the CERN Large Hadron Collider. Events with three or more leptons are categorized based on their flavor content and presence of a Z-boson candidate. Signal regions are constructed...Go to contribution page
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Brock Tweedie (Boston University)15/08/2013, 16:00Physics Beyond the Standard Modeloral presentationIf the lighter stop eigenstate decays directly to two jets via baryonic R-parity violation, it could have escaped existing LHC and Tevatron searches, even for masses as small as 100~GeV. The traditional approach to such a direct RPV stop pair search is to identify a bump in the joint spectrum of dijet pairs in four-jet events. However, this style of search seems to be in a losing race. As...Go to contribution page
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Thomas Danielson (University of California - Santa Barbara)15/08/2013, 16:20Physics Beyond the Standard Modeloral presentationTwo searches for gluino-mediated supersymmetry are presented based on events with large missing transverse energy and multiple jets, with some of the jets being identified as a bottom-quark jet. These searches cover two separate final states, one containing exactly zero isolated leptons, and the other containing exactly one isolated muon or electron. Both searches have been performed using...Go to contribution page
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Dr Keith Ulmer (University of Colorado, Boulder)15/08/2013, 16:40Physics Beyond the Standard Modeloral presentationThe sensitivity for CMS searches for supersymmetry is evaluated in the context of an upgraded LHC at a center-of-mass energy of 14 TeV and an integrated luminosity of 300 fb-1. Results for several key searches for supersymmetry are presented including direct and gluino-mediated stop and sbottom production and electroweak production of supersymmetric particles.Go to contribution page
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Nikita Blinov (TRIUMF/University of British Columbia)15/08/2013, 17:00Physics Beyond the Standard Modeloral presentationThe scalar potential of the Minimal Supersymmetric Standard Model (MSSM) admits the existence of vacua with non-vanishing expectation values of electrically and colour charged fields. If such minimima are deep enough, the physical electroweak vacuum is rendered unstable by quantum tunneling. By comparing the lifetime of the electroweak vacuum with the age of the universe, the MSSM...Go to contribution page
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Dr Jordi Salvado (Wisconsin IceCube Particle Astrophysics Center (WIPAC) and Department of Physics University of Wisconsin, Madison)16/08/2013, 09:00Physics Beyond the Standard Modeloral presentationRecent cosmological measurements favors additional relativistic energy density beyond the one provided by the three active neutrinos and photons of the Standard Model(SM), suggesting the need of new light states in the theory beyond those of the SM. Another alternative is that this increase comes from the decay of some new form of heavy matter into the SM neutrinos. In this talk I will...Go to contribution page
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Dr Andrea Albert (The Ohio State University)16/08/2013, 09:20Physics Beyond the Standard Modeloral presentationThere is overwhelming evidence that non-baryonic dark matter constitutes ~27% of the energy density of the universe. Weakly Interacting Massive Particles are promising dark matter candidates that may produce monochromatic gamma rays via annihilation or decay. Such interactions would produce a narrow spectral line in the Galactic diffuse gamma-ray energy spectrum. We have searched for...Go to contribution page
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Peter Garbincius (Fermilab)16/08/2013, 10:30Physics Beyond the Standard Modeloral presentationThe DO Collaboration has published three measurements of the like-sign dimuon charge asymmetry in p pbar collisions at the Fermilab Tevatron collider. The result is significantly different from the standard model prediction. In this talk we present the final measurement of this CP violating asymmetry, using the full 10 fb-1 of data collected during Run II, and discuss its possible interpretations.Go to contribution page
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Mr Daniel Chao (Caltech)16/08/2013, 10:50Physics Beyond the Standard Modeloral presentationWe present the measurement of B -> D(*) tau nu decay, which is sensitive at tree level to New Physics contributions in the form of a charged Higgs boson. The measured branching fraction is 3.4 sigma larger than the SM predictions, and excludes the 2HDM of type 2 with a 99.8% confidence level for any value of tan(beta)/mHiggs. Additional studies of the momentum transfered to the...Go to contribution page
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Alan Eisner (U.C. Santa Cruz)16/08/2013, 11:10Physics Beyond the Standard Modeloral presentationWe report on studies of flavor-changing neutral current decays of B mesons, recently performed using the large data set collected with the BaBar detector. Sensitivity to New Physics is tested through measurements of decay rates, rate asymmetries, and CP asymmetries, in several b -> s gamma, b -> s l+l-, b -> d gamma, and b -> d l+l- processes, as well as B -> K(*) nu anti-nu decays.Go to contribution page
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Dr Aleksey Sher (TRIUMF)16/08/2013, 11:30Physics Beyond the Standard Modeloral presentationThe PIENU experiment at TRIUMF aims to perform a precision measurement of the branching ratio of the helicity-suppressed pion decay, R = $\Gamma (\pi^+ \to e\nu + \pi^+ \to e\nu\gamma)/\Gamma (\pi^+ \to \mu\nu + \pi^+ \to \mu\nu\gamma)$. This ratio provides the most stringent test of the lepton-muon universality within the Standard Model and is currently predicted by the Standard Model to a...Go to contribution page
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Dr Eugenia Puccio (Stanford)16/08/2013, 11:50Physics Beyond the Standard Modeloral presentationWe present a search for fourteen lepton-number violating processes B --> X-l+l+, where X- = K-, pi-, rho-, K*-, or anti-p, and l+ = e+ or mu+, with a sample of about 470 million B anti-B pairs collected with the BaBar detector at the PEP-II asymmetric-energy e+e- collider at SLAC.Go to contribution page
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Prof. Frank Porter (Caltech)16/08/2013, 14:30Physics Beyond the Standard Modeloral presentationThe BABAR Collaboration has an intensive program of studying hadronic cross sections at low-energy e+e- collisions, accessible at BaBar via initial-state radiation. Our measurements allow significant improvements in the precision of the predicted value of the muon anomalous magnetic moment. These improvements are necessary for shedding light on the current ~3.5 sigma difference between...Go to contribution page
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Brendan Kiburg (Fermilab)16/08/2013, 14:50Physics Beyond the Standard Modeloral presentationThe Muon g-2 experiment at Fermilab will measure the anomalous magnetic moment of the muon, $a_{\mu}$, to 0.14 ppm. With a factor of four improved precision over the statistically limited Brookhaven E821 experiment, we will test the 3.6 $\sigma$ discrepancy between the Standard Model theory prediction and experimental results. Possible sources of this hint of new physics will be described and...Go to contribution page
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Mr Keita Fukushima (University of Hawaii at Manoa)16/08/2013, 15:10Physics Beyond the Standard Modeloral presentationg-2 correction has been accurately measured in the E821 experiment at Brookhaven National Lab (BNL). Theoretical calculations of the loop corrections to the fermion bremsstrahlung predict the observations quite well. Yet there remains a $~10^-4% > 3\sigma$ difference between experiment and theory. One way that this discrepancy can be interpreted is by new candidate particles running in the...Go to contribution page
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Mr Omar Moreno (Santa Cruz Institute for Particle Physics/University of California, Santa Cruz)16/08/2013, 15:30Physics Beyond the Standard Modeloral presentationThe Heavy Photon Search (HPS) is a new experiment at Jefferson Lab which will search for heavy $U(1)$ vector bosons (heavy/dark photons) in the mass range of 20 MeV/$c^2$ to 1 GeV/$c^2$. Dark photons in this mass range are theoretically favorable and may mediate dark matter interactions. The dark photon couples to electric charge through kinetic mixing with the photon, allowing its production...Go to contribution page
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Betrand Echenard (Caltech)16/08/2013, 15:50Physics Beyond the Standard Modeloral presentationAmong dark matter theories, the possibility of dark sector(s) has recently received much attention. This class of models introduces a new dark sector with WIMP-like dark matter particles charged under a new Abelian gauge group. The corresponding gauge boson, dubbed a dark photon, must be lighter than a few GeV to explain recent astrophysical and terrestrial anomalies. The dark photon...Go to contribution page
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David Yaylali (University of Hawaii)16/08/2013, 16:10Physics Beyond the Standard Modeloral presentationRecent developments have suggested that the dark sector may be much more complex than previously imagined. As a result, models such as Dynamical Dark Matter --- in which there are multiple dark-matter components which are only semi-stable but nevertheless contribute non-trivially to $\Omega_{\rm CDM}$ --- merit further study. One interesting potential signal which arises in such contexts...Go to contribution page
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Prof. Roland Allen (Department of Physics and Astronomy, Texas A&M University)16/08/2013, 16:30Physics Beyond the Standard Modeloral presentationThe present talk is based on arXiv:1101.0586 [hep-th], with some clarifications and additions, and a greater emphasis on the connection to standard physics. There has always been a remarkably close relationship between the partition function of statistical physics and the path integral of field theory. Here we argue that this is no coincidence, and that nature can be interpreted as a...Go to contribution page
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