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23 papers · 2 filters
The Status of Neutralino Dark Matter
Bibhushan Shakya
The lightest neutralino in supersymmetry is the most studied dark matter candidate. This writeup reviews the status of neutralino dark matter in minimal and nonminimal supersymmetr…
NNLL Momentum-Space Resummation for Stop-Pair Production at the LHC
Alessandro Broggio, Andrea Ferroglia, Matthias Neubert +2
If supersymmetry near the TeV scale is realized in Nature, the pair production of scalar top squarks is expected to be observable at the Large Hadron Collider. Recently, effective…
Higgs Decay into Two Photons at the Boundary of a Warped Extra Dimension
Juliane Hahn, Clara Hörner, Raoul Malm +3
A detailed five-dimensional calculation of the Higgs-boson decay into two photons is performed in both the minimal and the custodially protected Randall-Sundrum (RS) model, where t…
Subtleties in the BaBar measurement of time-reversal violation
Elaad Applebaum, Aielet Efrati, Yuval Grossman +2
A first measurement of time-reversal (T) asymmetries that are not also CP asymmetries has been recently achieved by the BaBar collaboration. We analyze the measured asymmetries in…
Probing CP Violation in with Converted Photons
Fady Bishara, Yuval Grossman, Roni Harnik +3
We study Higgs diphoton decays, in which both photons undergo nuclear conversion to electron- positron pairs. The kinematic distribution of the two electron-positron pairs may be u…
A higgs-like dilaton: viability and implications
Javi Serra
We re-examine the feasibility of the higgs-like particle discovered at the LHC being a dilaton: the Goldstone boson of spontaneous breaking of scale invariance. We review the expec…
Higgs Couplings and Naturalness in -SUSY
Marco Farina, Maxim Perelstein, Bibhushan Shakya
We study Higgs boson couplings in the large- version of the Next-to-Minimal Supersymmetric Standard Model, known as -SUSY. We find that the predicted deviations from the Stan…
Angular Distributions as Lifetime Probes
Jeff Asaf Dror, Yuval Grossman
If new TeV scale particles are discovered, it will be important to determine their width. There is, however, a problematic region, where the width is too small to be determined dir…
Effects of K-\bar K mixing on determining gamma from B^\pm -> DK^\pm
Yuval Grossman, Michael Savastio
The decay followed by the subsequent decay of the meson into final states involving a neutral kaon can be used to determine the CKM angle . We study CP…
Fermions in Randall-Sundrum Models with Two Additional Unwarped Extra Dimensions
Erin De Pree, Jeremy Perrin
Models with one warped and two unwarped extra dimensions allow for the solution of a number of open questions in particle physics. They can be used to solve the hierarchy problem i…
RPV SUSY with Same-Sign Dileptons at LHC-14
Michael Saelim, Maxim Perelstein
We estimate the sensitivity of the 14 TeV LHC run to an R-parity violating supersymmetric model, via the same-sign dilepton (SSDL) signature. We consider the simplified model with…
The Problem of Dirac Gauginos and its Solutions
Csaba Csaki, Jessica Goodman, Riccardo Pavesi +1
We examine the effective low-energy theory of the adjoint sector of Dirac gaugino models and its UV completions, and identify the main source of tuning. A holomorphic scalar adjoin…
Dynamical R-Parity Violation
Csaba Csaki, Eric Kuflik, Tomer Volansky
We present a new paradigm for supersymmetric theories with R-parity violation (RPV). At high scale, R-parity is conserved in the visible sector but spontaneously broken in the SUSY…
More Flavor SU(3) Tests for New Physics in CP Violating B Decays
Yuval Grossman, Zoltan Ligeti, Dean J. Robinson
The recent LHCb measurements of the and rates and CP asymmetries are in agreement with U-spin expectations from and $B_d \to π^+π…
Physics Case for the ILC Project: Perspective from Beyond the Standard Model
Howard Baer, Mikael Berggren, Jenny List +5
The International Linear Collider (ILC) has recently proven its technical maturity with the publication of a Technical Design Report, and there is a strong interest in Japan to hos…
The Effective Theory of Self-Interacting Dark Matter
Brando Bellazzini, Mathieu Cliche, Philip Tanedo
We present an effective non-relativistic theory of self-interacting dark matter. We classify the long range interactions and discuss how they can be generated from quantum field th…
The International Linear Collider Technical Design Report - Volume 2: Physics
Howard Baer, Tim Barklow, Keisuke Fujii +15
The International Linear Collider Technical Design Report (TDR) describes in four volumes the physics case and the design of a 500 GeV centre-of-mass energy linear electron-positro…
Standard Model predictions for B -> Kll with form factors from lattice QCD
Chris Bouchard, G. Peter Lepage, Christopher Monahan +2
We calculate, for the first time using unquenched lattice QCD form factors, the Standard Model differential branching fractions for and compare wit…
Higgs Couplings and Naturalness
Marco Farina, Maxim Perelstein, Nicolas Rey-Le Lorier
Many extensions of the Standard Model postulate the existence of new weakly coupled particles, the top partners, at or below the TeV scale. The role of the top partners is to cance…
The Same-Sign Dilepton Signature of RPV/MFV SUSY
Joshua Berger, Maxim Perelstein, Michael Saelim +1
The lack of observation of superpartners at the Large Hadron Collider so far has led to a renewed interest in supersymmetric models with R-parity violation (RPV). In particular, im…
A modified naturalness principle and its experimental tests
Marco Farina, Duccio Pappadopulo, Alessandro Strumia
Motivated by LHC results, we modify the usual criterion for naturalness by ignoring the uncomputable power divergences. The Standard Model satisfies the modified criterion ('finite…
A Complete Model for R-parity Violation
Csaba Csáki, Ben Heidenreich
We present a complete model whose low energy effective theory is the R-parity violating NMSSM with a baryon number violating udd vertex of the MFV SUSY form, leading to prompt LSP…
How to test for mass degenerate Higgs resonances
Yuval Grossman, Ze'ev Surujon, Jure Zupan
The Higgs-like signal observed at the LHC could be due to several mass degenerate resonances. We show that the number of resonances is related to the rank of a "production and deca…