Baryon Stability on the Higgs Dissolution Edge : Threshold corrections and suppression of Baryon violation in the NMSGUT

Superheavy threshold corrections to the matching condition between matter Yukawa couplings of the effective Minimal Supersymmetric Standard Model (MSSM) and the New Minimal Supersymmetric (SO(10)) GUT(NMSGUT) provide a novel and generic mechanism for reducing the long standing and generically problematic operator dimension 5 Baryon decay rates. In suitable regions of the parameter space strong wave function renormalization of the effective MSSM Higgs doublets due to the large number of heavy fields can take the wave function renormalization of the MSSM Higgs field close to the dissolution value ($Z_{H,\overline{H}}=0$). Rescaling to canonical kinetic terms lowers the SO(10) Yukawas required to match the MSSM fermion data. Since the same Yukawas determine the dimension 5 B violation operator coefficients, the associated rates can be suppressed to levels compatible with current limits. Including these threshold effects also relaxes the constraint $y_b-y_\tau\simeq y_s-y_\mu$ operative between $\textbf{10} -\textbf{120}$ plet generated tree level MSSM matter fermion Yukawas $y_f$. We exhibit accurate fits of the MSSM fermion mass-mixing data in terms of NMSGUT superpotential couplings and 5 independent soft Susy breaking parameters specified at $10^{16.25}\,$ GeV with the claimed suppression of Baryon decay rates. As before, our s-spectra are of the mini split supersymmetry type with large $|A_0|,\mu,m_{H,\overline H} > 100\,\,$ TeV, light gauginos and normal s-hierarchy. Large $A_0,\mu$ and soft masses allow significant deviation from the canonical GUT gaugino mass ratios and ensure vacuum safety. Even without optimization, prominent candidates for BSM discovery such as the muon magnetic anomaly, $b\rightarrow s\gamma$ and Lepto-genesis CP violation emerge in the preferred ball park.Comment: PdfLatex. 50 pages. Version accepted for publication in Nuclear Phys.B(2014). Available online at http://dx.doi.org/10.1016/j.nuclphysb.2014.03.003. arXiv admin note: substantial text overlap with arXiv:1107.296

Study of energy deposition patterns in hadron calorimeter for prompt and displaced jets using convolutional neural network

Sophisticated machine learning techniques have promising potential in search for physics beyond Standard Model in Large Hadron Collider (LHC). Convolutional neural networks (CNN) can provide powerful tools for differentiating between patterns of calorimeter energy deposits by prompt particles of Standard Model and long-lived particles predicted in various models beyond the Standard Model. We demonstrate the usefulness of CNN by using a couple of physics examples from well motivated BSM scenarios predicting long-lived particles giving rise to displaced jets. Our work suggests that modern machine-learning techniques have potential to discriminate between energy deposition patterns of prompt and long-lived particles, and thus, they can be useful tools in such searches.Comment: 32 pages, 17 figures; version accepted for publication in JHE

Leptonic CP violation in the minimal type-I seesaw model : Bottom-up phenomenology & top-down model building

This work deals with a minimal realization of the type-I seesaw model with only two right-handed Majorana neutrinos, which is investigated from two perspectives; bottom-up and top-down. In a data-driven approach, the manifestation of certain hierarchies in the neutrino Yukawa matrix is analyzed in the context of realizable approximate two-zero textures. A general method for the investigation of Yukawa structures is developed and applied to the minimal seesaw model. Besides a robustness study of the obtained results, theoretical error bars are assigned to this model's predictions. In a top-down ansatz, a high-energy embedding of the minimal seesaw model is built that exhibits minimal degrees of freedom. A minimal SU(5) Froggatt-Nielsen avor model is chosen and assuming approximate exchange symmetries in the heavy neutrino sector helps to reduce the model's free parameter. Demanding consistency with electroweak naturalness and leptogenesis leads to a most minimal type-I seesaw model, that emerges from a high-energy theory and predicts at the same time all measured neutrino observables

Light Sterile Neutrinos: A White Paper

This white paper addresses the hypothesis of light sterile neutrinos based on recent anomalies observed in neutrino experiments and the latest astrophysical data

The Case against Expanding Defamation Law

It is axiomatic that defamation law protects reputation This proposition ”common sensical pervasive and influential ”is wrong But it is wrong in a very instructive way and a careful examination of its mistaken assumptions carries deep lessons for First Amendment jurisprudence defamation law and the regulation of falsehoods across legal fields brbrThe key fallacy is the failure to recognize that laws not only affect how individuals behave but also how they think Whenever an allegation is made individuals decide whether and how much to trust it based on myriad factors One such factor is the strictness of defamation laws To the extent strict defamation laws deter purveyors of falsehoods they also make statements appear more trustworthy as individuals will reason that few would brave a falsity in the face of strong financial sanctions Thus strict defamation laws have the unintended consequence of making individuals more susceptible to believe those statements that are actually false brbrThis heretofore unrecognized complexity of defamation law has the potential of tipping the scales in First Amendment jurisprudence towards greater protection of free speech and free press Most urgently these findings give pause to the presidential calls to fight ˜fake news\u27 by expanding libel laws by showing that such laws may well backfire and exaggerate the effect of fake new

A facility to Search for Hidden Particles (SHiP) at the CERN SPS

A new general purpose fixed target facility is proposed at the CERN SPS accelerator which is aimed at exploring the domain of hidden particles and make measurements with tau neutrinos. Hidden particles are predicted by a large number of models beyond the Standard Model. The high intensity of the SPS 400~GeV beam allows probing a wide variety of models containing light long-lived exotic particles with masses below ${\cal O}$(10)~GeV/c$^2$, including very weakly interacting low-energy SUSY states. The experimental programme of the proposed facility is capable of being extended in the future, e.g. to include direct searches for Dark Matter and Lepton Flavour Violation.Comment: Technical Proposa