We present a preliminary set of updated NLO parton distributions. For the first time we have a quantitative extraction of the strange quark and antiquark distributions and their uncertainties determined from CCFR and NuTeV dimuon cross sections. Additional jet data from HERA and the Tevatron improve our gluon extraction. Lepton asymmetry data and neutrino structure functions improve the flavour separation, particularly constraining the down quark valence distribution.

http://inspirehep.net/record/752235/files/arXiv:0706.0456.pdf

Parton distributions for the LHC

We study a two dimensional dilaton gravity system, recently examined by Almheiri and Polchinski, which describes near extremal black holes, or more generally, nearly $AdS_2$ spacetimes. The asymptotic symmetries of $AdS_2$ are all the time reparametrizations of the boundary. These symmetries are spontaneously broken by the $AdS_2$ geometry and they are explicitly broken by the small deformation away from $AdS_2$. This pattern of spontaneous plus explicit symmetry breaking governs the gravitational backreaction of the system. It determines several gravitational properties such as the linear in temperature dependence of the near extremal entropy as well as the gravitational corrections to correlation functions. These corrections include the ones determining the growth of out of time order correlators that is indicative of chaos. These gravitational aspects can be described in terms of a Schwarzian derivative effective action for a reparametrization.

Conformal symmetry and its breaking in two dimensional Nearly Anti-de-Sitter space

Warped models with the Higgs in the bulk can generate light Kaluza-Klein (KK) Higgs modes consistent with the electroweak precision analysis. The first KK mode of the Higgs (h
 1) could lie in the 1-2 TeV range in the models with a bulk custodial symmetry. We find that the h
 1 is gaugephobic and decays dominantly into a $$ t\overline{t} $$
 pair. We also discuss the search strategy for h
 1 decaying to $$ t\overline{t} $$
 at the Large Hadron Collider. We used substructure tools to suppress the large QCD background associated with this channel. We find that h
 1 can be probed at the LHC run-2 with an integrated luminosity of 300 fb−1.

/pdf/a-higgs-in-the-warped-bulk-and-lhc-signals-5gtr9u4na0.pdf

A Higgs in the Warped Bulk and LHC signals

We give a derivation of quantum spectral curve (QSC) - a finite set of Riemann-Hilbert equations for exact spectrum of planar N = 4 SYM theory proposed in our recent paper Phys. Rev. Lett. 112 (201 ...

/pdf/quantum-spectral-curve-for-arbitrary-state-operator-in-ads-5-3mrtwcq3nc.pdf

Quantum spectral curve for arbitrary state/operator in AdS 5 /CFT 4

We construct the holographic dictionary for both running and constant dilaton solutions of the two dimensional Einstein-Maxwell-Dilaton theory that is obtained by a circle reduction from Einstein-Hilbert gravity with negative cosmological constant in three dimensions. This specific model ensures that the dual theory has a well defined ultraviolet completion in terms of a two dimensional conformal field theory, but our results apply qualitatively to a wider class of two dimensional dilaton gravity theories. For each type of solutions we perform holographic renormalization, compute the exact renormalized one-point functions in the presence of arbitrary sources, and derive the asymptotic symmetries and the corresponding conserved charges. In both cases we find that the scalar operator dual to the dilaton plays a crucial role in the description of the dynamics. Its source gives rise to a matter conformal anomaly for the running dilaton solutions, while its expectation value is the only non trivial observable for constant dilaton solutions. The role of this operator has been largely overlooked in the literature. We further show that the only non trivial conserved charges for running dilaton solutions are the mass and the electric charge, while for constant dilaton solutions only the electric charge is non zero. However, by uplifting the solutions to three dimensions we show that constant dilaton solutions can support non trivial extended symmetry algebras, including the one found by Compere, Song and Strominger [1], in agreement with the results of Castro and Song [2]. Finally, we demonstrate that any solution of this specific dilaton gravity model can be uplifted to a family of asymptotically AdS2 × S
 2 or conformally AdS2 × S
 2 solutions of the STU model in four dimensions, including non extremal black holes. The four dimensional solutions obtained by uplifting the running dilaton solutions coincide with the so called ‘subtracted geometries’, while those obtained from the uplift of the constant dilaton ones are new.

/pdf/ads-2-holographic-dictionary-yu1y0gqtnv.pdf

AdS 2 holographic dictionary

Kaluza-Klein gluon + jets associated production at the Large Hadron Collider

Abstract Electroweak precision tests allow for lighter Kaluza–Klein (KK) Higgs modes in the deformed Randall–Sundrum (RS) model than in models with custodial symmetry. The first KK mode of the Higgs ( h 1 ) in such a model could have a mass as low as 900 GeV. In this paper, we study the production of h 1 and its subsequent decay to a t t ¯ pair at the Large Hadron Collider (LHC), in the context of the deformed RS model. We have performed a hadron-level Monte Carlo simulation of the signal and the relevant Standard Model background. We present strategies to effectively suppress the huge SM background and provide a signal that is tractable at the future runs of the LHC.

/pdf/the-bulk-higgs-in-the-deformed-rs-model-arxiv-1aeubgap3h.pdf

The bulk Higgs in the Deformed RS Model : arXiv

The bulk Higgs in the deformed RS model

Warped models with the Higgs in the bulk can generate light Kaluza-Klein (KK) Higgs modes consistent with the electroweak precision analysis. The first KK mode of the Higgs (h_{1}) could lie in the 1-2 TeV range in the models with a bulk custodial symmetry. We find that the h_{1} is gaugephobic and decays dominantly into a t\bar{t} pair. We also discuss the search strategy for h_{1} decaying to t\bar{t} at the Large Hadron Collider. We used substructure tools to suppress the large QCD background associated with this channel. We find that h_{1} can be probed at the LHC run-2 with an integrated luminosity of 300 fb^{-1}.

N. Manglani

Papers

A Higgs in the Warped Bulk and LHC signals

Kaluza-Klein gluon + jets associated production at the Large Hadron Collider

The bulk Higgs in the Deformed RS Model : arXiv

The bulk Higgs in the deformed RS model

A Higgs in the Warped Bulk and LHC signals