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Glueball dark matter in non-standard cosmologies

Hidden sector glueball dark matter is well motivated by string theory, compactifications of which often have extra gauge groups uncoupled to the visible sector. We study the dynamics of glueballs in theories with a period of late time primordial matter domination followed by a low final reheating temperature due to a gravitationally coupled modulus. Compared to scenarios with a...

Neutrino mass from M theory SO(10)

We study the origin of neutrino mass from SO(10) arising from M Theory compactified on a G 2-manifold. This is linked to the problem of the breaking of the extra U(1) gauge group, in the SU(5) × U(1) subgroup of SO(10), which we show can achieved via a (generalised) Kolda-Martin mechanism. The resulting neutrino masses arise from a combination of the seesaw mechanism and induced...

188: Expensive Therapies: Legal and Ethical Analyses

Increasingly expensive therapies are becoming available for “orphan” diseases. For example, ivacaftor given orally targets and corrects the dysfunctional cell membrane protein in cystic fibrosis (CF), but only in individuals who carry one of several rare genetic CF mutations. Ivacaftor is priced at $300,000 CDN per patients over 6 years of age, per year, for life. Ivacaftor does...

Prospects for observing charginos and neutralinos at a 100 TeV proton-proton collider

We investigate the prospects for discovering charginos and neutralinos at a future pp collider with \( \sqrt{s} \) = 100 TeV. We focus on models where squarks and sleptons are decoupled — as motivated by the LHC data. Our initial study is based on models where Higgsinos form the main component of the LSP and W -inos compose the heavier chargino states (M 2 > μ), though it is...

Microwave-assisted chemical reduction routes for direct synthesis of Fe–Pt nanoparticles in ordered face centered tetragonal L10 phase

Appl Nanosci S. Acharya 0 K. Singh 0 0 S. Acharya (&) K. Singh Department of Physics, Rashtrasant Tukdoji Maharaj Nagpur University , Nagpur 440033, Maharashtra , India In the present work

Search for a new heavy gauge-boson resonance decaying into a lepton and missing transverse momentum in 36 fb \(^{-1}\) of pp collisions at \(\sqrt{s} = 13\) TeV with the ATLAS experiment

The results of a search for new heavy \(W^\prime \) bosons decaying to an electron or muon and a neutrino using proton–proton collision data at a centre-of-mass energy of \(\sqrt{s}~=~13\) TeV are presented. The dataset was collected in 2015 and 2016 by the ATLAS experiment at the Large Hadron Collider and corresponds to an integrated luminosity of 36.1 \(\text{ fb }^{-1}\). As...

Long-term study of Mkn 421 with the HAGAR Array of Telescopes

Context. The HAGAR Telescope Array at Hanle, Ladakh has been regularly monitoring the nearby blazar Mkn 421 for the past seven years.Aims. Blazars show flux variability in all timescales across the electromagnetic spectrum. While there is abundant literature characterizing the short-term flares from different blazars, comparatively little work has been carried out to study the...

R-parity conservation from a top down perspective

Motivated by results from the LHC and dark matter searches, we study the possibility of phenomenologically viable R-parity violation in SU(5) GUT models from a top-down point of view. We show that in contrast to the more model dependent bounds on the proton lifetime, the limits on neutrino masses provide a robust, stringent and complementary constraint on all SU(5) GUT-based R...

Search for heavy ZZ resonances in the $$\ell ^+\ell ^-\ell ^+\ell ^-$$ and $$\ell ^+\ell ^-\nu \bar{\nu }$$ℓ+ℓ-νν¯ final states using proton–proton collisions at $$\sqrt{s}= 13$$s=13 $$\text {TeV}$$TeV with the ATLAS detector

A search for heavy resonances decaying into a pair of \(Z\) bosons leading to \(\ell ^+\ell ^-\ell ^+\ell ^-\) and \(\ell ^+\ell ^-\nu \bar{\nu }\) final states, where \(\ell \) stands for either an electron or a muon, is presented. The search uses proton–proton collision data at a centre-of-mass energy of 13 \(\text {TeV}\) corresponding to an integrated luminosity of 36.1...

Kahler independence of the G 2-MSSM

The G 2-MSSM is a model of particle physics coupled to moduli fields with interesting phenomenology both for colliders and astrophysical experiments. In this paper we consider a more general model—whose moduli Kahler potential is a completely arbitrary G 2-holonomy Kahler potential and whose matter Kahler potential is also more general. We prove that the vacuum structure and...

Combination of inclusive and differential \( \mathrm{t}\overline{\mathrm{t}} \) charge asymmetry measurements using ATLAS and CMS data at \( \sqrt{s}=7 \) and 8 TeV

AbstractThis paper presents combinations of inclusive and differential measurements of the charge asymmetry (AC) in top quark pair \( \left(\mathrm{t}\overline{\mathrm{t}}\right) \) events with a lepton+jets signature by the ATLAS and CMS Collaborations, using data from LHC proton-proton collisions at centre-of-mass energies of 7 and 8 TeV. The data correspond to integrated...

$$\pi ^{0}$$ and $$\eta $$η meson production in proton-proton collisions at $$\sqrt{s}=8$$s=8 TeV

, S. Acharya et al., Production of π 0 and η mesons up to high transverse momentum in pp collisions at 2.76 TeV . Eur. Phys. J. C 77 , 339 ( 2017 ). arXiv: 1702 .00917 [hep-ex] 10. D. d'Enterria , K.J

A search for pair-produced resonances in four-jet final states at $$\sqrt{s}=13$$$$\text {TeV}$$TeV with the ATLAS detector

A search for massive coloured resonances which are pair-produced and decay into two jets is presented. The analysis uses 36.7 fb\(^{-1}\) of \(\sqrt{s}\) = 13 TeV pp collision data recorded by the ATLAS experiment at the LHC in 2015 and 2016. No significant deviation from the background prediction is observed. Results are interpreted in a SUSY simplified model where the lightest...

Measurement of differential cross-sections of a single top quark produced in association with a W boson at $$\sqrt{s}={13}{\text {TeV}}$$ with ATLAS

The differential cross-section for the production of a W boson in association with a top quark is measured for several particle-level observables. The measurements are performed using \({36.1}\,\text {fb}^{-1}\) of pp collision data collected with the ATLAS detector at the LHC in 2015 and 2016. Differential cross-sections are measured in a fiducial phase space defined by the...

Measurement of quarkonium production in proton–lead and proton–proton collisions at $$5.02~\mathrm {TeV}$$ with the ATLAS detector

The modification of the production of \(J/\psi \), \(\psi (2\mathrm {S})\), and \(\varUpsilon (n\mathrm {S})\) (\(n = 1, 2, 3\)) in p+Pb collisions with respect to their production in pp collisions has been studied. The p+Pb and pp datasets used in this paper correspond to integrated luminosities of \(28~\mathrm {nb}^{-1}\) and \(25~\mathrm {pb}^{-1}\) respectively, collected in...

Measurement of $$\tau $$ polarisation in $$Z/\gamma ^{*}\rightarrow \tau \tau $$Z/γ∗→ decays in proton–proton collisions at $$\sqrt{s}=8$$s=8 TeV with the ATLAS detector

This paper presents a measurement of the polarisation of \(\tau \) leptons produced in \(Z/\gamma ^{*}\rightarrow \tau \tau \) decays which is performed with a dataset of proton—proton collisions at \(\sqrt{s}=8\) TeV, corresponding to an integrated luminosity of 20.2 fb\(^{-1}\) recorded with the ATLAS detector at the LHC in 2012. The \(Z/\gamma ^{*}\rightarrow \tau \tau...

Search for the direct production of charginos and neutralinos in final states with tau leptons in $$\sqrt{s} = 13\,\mathrm{TeV}$$ pp collisions with the ATLAS detector

A search for the direct production of charginos and neutralinos in final states with at least two hadronically decaying tau leptons is presented. The analysis uses a dataset of pp collisions corresponding to an integrated luminosity of 36.1 fb\(^{-1}\), recorded with the ATLAS detector at the Large Hadron Collider at a centre-of-mass energy of 13 TeV. No significant deviation...