Description
In order to access the list of posters (and PDF files) please click on "View session details". Instruction for preparing your posters is available at http://lhcp2017.physics.sjtu.edu.cn/node/52
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Pedro Fernandez Manteca (Universidad de Cantabria (ES))16/05/2017, 14:00
A measurement of the W+W− cross section in pp collisions at 13 TeV is presented.
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The data were collected with the CMS detector at the LHC in 2015, and correspond
to an integrated luminosity of 2.3 ± 0.1 fb-1 . The measurement is performed by selecting events with one electron and one muon of opposite charge, accompanied
by large missing transverse energy. The W+W− cross section is measured to... -
Xinye Peng (Central China Normal University CCNU (CN))16/05/2017, 14:00
Heavy quarks (charm and beauty) are produced on a short time scale compared to the formation time of the Quark-Gluon Plasma (QGP) which is formed in heavy-ion collisions at ultra-relativistic energy. They propagate through and interact with the medium. Thus, they are powerful probes to study the properties of the QGP. The measurements of the nuclear modification factor and azimuthal anisotropy...
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Hong-Fei Zhang, Dr Zhan Sun (Guizhou Minzu University)16/05/2017, 14:00
The color-singlet $J/\psi$ production in deeply inelastic scattering at QCD next-to-leading order is studied for the first time. We find that it can provide useful reference to the $J/\psi$ hadroproduction at QCD next-to-next-to-leading order. The color-octet $J/\psi$ production at QCD leading order will also be adressed.
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Mr Ya Zhu (CCNU)16/05/2017, 14:00
Anisotropic flow plays a critical role in understanding the
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properties of the quark-gluon plasma. In this poster we present the
elliptic and triangular flow of identified particles in Pb-Pb collisions at ${\rm\sqrt{s_{NN}}}$ = 5.02 TeV recorded by the ALICE detector. The measurements are presented for a wide range of particle transverse momenta. The results are compared to the ones in Pb-Pb... -
Prof. Yongsheng Gao (California State University, Fresno)16/05/2017, 14:00
This abstract focuses on providing access to quality research opportunities for students from under represented groups through a summer research program through the Nuclear and Particle Physics Consortium at the California State University (CSU) system.
With over 460,000 students from a diverse range of backgrounds, the CSU system is the largest university system in the United states. It is...
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Zhenwei Cui (Peiking University)16/05/2017, 14:00
A Search and measurement at Circular Electron Positron Collider (CEPC) is reported for Higgs Boson rare decay to $\mu^+\mu^-$, of which the SM branch ratio is $2.19 \times 10^{-4}$. This is an important channel to further examine the Higgs couplings with second generation of fermions. The analysis is performed on 240GeV CEPC with expected 5ab-1 luminosity in 10 years, with GEANT4-based full...
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Mr Geng Chen (Peking University (CN))16/05/2017, 14:00
The Flavour Changing Neutral Current decays of type b->s mu+mu- provide high sensitivity to New Physics contributions. Sensitive observables include the branching fraction, muon forward-backward asymmetry, the fraction of longitudinal polarization, form-factor independent variables etc. CMS can detect and measure them very well. We report the recent results from CMS on these topics.
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Shan Cheng (Siegen University)16/05/2017, 14:00
We study $B\to\pi\pi$ form factors using QCD light-cone sum rules with $B$-meson distribution amplitudes. These form factors describe the semileptonic decay $B\to \pi\pi \ell\bar{\nu}_{\ell}$, and constitute an essential input in $B\to \pi\pi \ell^+\ell^-$ and $B\to \pi\pi\pi$ decays. We employ the correlation functions where a dipion isospin-one state is interpolated by the vector light-quark...
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Mr Yu-ji Shi16/05/2017, 14:00
We suggest to study the $B_s$ and its excitations $B_{sJ}$ in the Bc decays. We calculate the $B_c → B_{sJ}$ and $B_c → B_J$ form factors within the covariant light-front quark model, where the $B_{sJ}$ and $B_J$ denote an s-wave or p-wave $\bar b s$ and $\bar b d$ meson, respectively. The form factors at $q^2 = 0$ are
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directly computed while their $q^2$-distributions are obtained by the... -
Erhan Gulmez (Bogazici University (TR))16/05/2017, 14:00
CMS-HF Calorimeters have been undergoing a major upgrade for the last couple of years to alleviate the problems encountered during Run I, especially in the PMT and the readout systems. In this poster, the problems caused by the old PMTs installed in the detectors and their solutions will be explained. Initially, regular PMTs with windows thick enough to cause Cherenkov radiation were used....
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Juri Fiaschi (University of Southampton)16/05/2017, 14:00
We define a Focus Point (FP) Asymmetry, $A_{\rm FP}$, obtained by integrating the normalised transverse momentum distribution of either lepton produced in the Drell-Yan (DY) process below and above a point where a variety of popular $Z^\prime$ models all have the same magnitude.
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For a given $Z^\prime$ mass the position of this FP is predictable, depending only on the collider energy and on... -
Dr Mengjiao Xiao (University of Maryland, College Park)16/05/2017, 14:00
The PandaX (Particle AND Astrophysical Xenon) project is a staged xenon-based underground experiment at the China Jin-Ping Underground Laboratory. Using a dual phase xenon time projection chamber (TPC) technology, the second phase of the experiment, PandaX-II, contains more than half ton LXe in the sensitive volume for WIMP dark matter searches.
PandaX-II started the data taking in 2016 and...
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Min He (INPAC, Deparment of Physics and Astronomy, Shanghai Jiao Tong University)16/05/2017, 14:00
One of the interesting portals linking a dark sector and the standard model (SM) is the kinetic mixing between the SM $U(1)_Y$ field with a new dark photon $A'$ from a $U(1)_{A'}$ gauge interaction. Stringent limits have been obtained for the kinetic mixing parameter $\epsilon$ through various processes. In this work, we study the possibility of searching for a dark photon interaction at a...
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Ms Swagata Mukherjee (Rheinisch-Westfaelische Tech. Hoch. (DE))16/05/2017, 14:00
In 2011, the CMS collaboration introduced the concept of data scouting as an alternative strategy to normal data-taking technique, allowing to take data that otherwise would be rejected by the trigger filters. This special data flow, based on event-size reduction rather than event filtering, was exercised to maintain sensitivity to new light resonances decaying to jets, with very small online...
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Mr Ke-Pan Xie (Peking University)16/05/2017, 14:00
We study double parton scattering (DPS) processes in gauge boson plus two jets ($W/Zjj$) final state and same sign W bosons ($W^\pm W^\pm$) final state at pp-collider with $\sqrt{s}= 13$ TeV and 100 TeV. We compare two different double parton models. After that, we discuss the kinematic distribution features of DPS events, showing the existence of distinctive observables, which can be used to...
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Mr Chen Zhang (Peking University)16/05/2017, 14:00
I will discuss the prospects of searching for exotic Higgs decays at the proposed Large Hadron Electron Collider (LHeC), which is a high luminosity electron-proton collider expected to run synchronously with the HL-LHC. Two examples will be presented, namely the invisible Higgs decay and the Higgs decaying to 4b via intermediate scalars. Compared to the HL-LHC, the LHeC is demonstrated to...
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Dr Dingyu Shao16/05/2017, 14:00
Jets not only display the behaviour of QCD over a wide range of energy scales, from hard colliding energy to the hadronization energy, but also contain important signatures of exotic physics, such as top quarks or particles beyond the SM. In particular, recently jet substructure observables are playing a central role in a large number of analyses at the LHC. Most of the theoretical discussion...
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Prof. Chung Kao (University of Oklahoma)16/05/2017, 14:00
A general two Higgs doublet model (2HDM) is adopted to study the signature of
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flavor changing neutral Higgs (FCNH) decay
$\phi^0 \to t\bar{c}+\bar{t}c$ and $\phi^0 \to \tau\mu$, where
$\phi^0$ could be a CP-even scalar ($H^0$) or a CP-odd pseudoscalar ($A^0$)
as well as $t \to c h^0$.
Measurement of the light 125 GeV neutral Higgs boson ($h^0$) couplings at the
Large Hadron Collider (LHC)... -
Janusz Rosiek (University of Warsaw)16/05/2017, 14:00
Calculating amplitudes for the flavor changing transitions in terms of
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the off-diagonal elements of mass matrices (so called "mass
insertions") in the theory defined in "gauge basis" (before mass
matrix diagonalization) is the common technique in analyzing the
flavor structure of the New Physics models. I will present a general
method allowing to expand any QFT amplitude calculated in... -
qingdong wu (Guizhou Normal University), Yi Yang (Guizhou Normal University)16/05/2017, 14:00
An analytic massive total cross section of photon–proton scattering is derived, which has geometric scaling. A geometric scaling is used to perform a global analysis of the deep inelastic scattering data on inclusive structure function 𝐹2 measured in lepton–hadron scattering experiments at small values of Bjorken 𝑥. It is shown that the descriptions of the inclusive structure function 𝐹2 and...
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Prof. Carlos Merino (Departamento de Fisica de Particulas, Facultade de Fisica and Instituto Galego de Fisica de Altas Enerxias (IGFAE), Universidade de Santiago de Compostela (Spain))16/05/2017, 14:00
We use the Quark-Gluon String Model to obtain a quantitatively good description of the phi-meson production experimental data in hadron-nucleon collisions on the spectra of secondary phi, as well as on the ratios of phi/pi- and phi/K-production cross sections, for a wide energy region. We also consider the experimental data on phi-meson production on nuclear targets, and we find that they...
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Muhammad Bilal Kiani (Universita e INFN Torino (IT))16/05/2017, 14:00
The properties of the Higgs boson would be presented in the ${\rm H}\rightarrow{\rm Z}{\rm Z}\rightarrow4\ell$ ($\ell={\rm e},\mu$) decay channel using a data sample corresponding to an integrated luminosity of $36.8~{\rm fb}^{-1}$ of proton-proton collisions at a center-of-mass energy of $13~{\rm TeV}$ recorded by the CMS detector at the LHC. The expected significance for the standard model...
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Chao Wei16/05/2017, 14:00
In this talk I mainly discuss the first order electroweak phase transition (EWPT) triggered by a Higgs singlet. Bubble nucleation as well as constraints from Higgs measurements at the LHC run-2 will be discussed. Stochastic gravitational wave signals in spaced-based interferometer generated by the first order EWPT at the will be shown in the talk.
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Raman Khurana (National Central University (TW))16/05/2017, 14:00
The High Granularity Calorimeter (HGCAL) is the technology choice of the CMS collaboration for the endcap calorimetry upgrade planned to cope with the harsh radiation and unprecedented in-time event pileup projected at the High Luminosity-LHC era. In this context, profiting from fast-timing information (~tens of picoseconds) embedded in the calorimeter would represent a unique capability for...
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Karoly Urmossy (Shandong University)16/05/2017, 14:00
- Microcanonical statistical jet-fragmentation model is presented
- Arguments are enumerated supporting the usage of the Jet Mass as fragmentation scale
- fits to ep and pp data are presented
- DGLAP evolution is discussed
- applications in pp and AA collisions (hadron spectra, v2) are discussed
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Mario Campanelli (University College London (UK))16/05/2017, 14:00
We report on the measurement of the cross-section of WW and WZ bosons using data collected by ATLAS in 2012 at a center-of-mass energy of 8 TeV. The decay mode considered is where one of the W bosons decays leptonically into a light lepton and a neutrino, while the other W or the Z boson decay hadronically. Depending on the kinematic configuration, the two jets from this hadronic decay can be...
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Savannah Jennifer Thais (Yale University (US))16/05/2017, 14:00
Efficient and accurate electron identification is of critical importance to measuring many physics processes with leptons in the final state, including H->4l, dark vector boson searches, and various SUSY searches. This poster will describe the current status of the Likelihood driven Electron ID, as well as the most recent identification efficiency and scale-factor measurements. The poster will...
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Cong Peng (Chinese Academy of Sciences (CN))16/05/2017, 14:00
This poster presents fiducial and differential cross-section measurements of the Higgs boson in the H→γγ decay channel, using proton-proton collisions recorded at a 13 TeV centre-of-mass energy during 2015 and 2016. The amount of background, mainly from SM diphoton production and hadronic jets, is determined by a simultaneous signal and background fit to the diphoton mass spectrum. The...
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Huijun Zhang (Universite de Paris-Sud 11 (FR))16/05/2017, 14:00
This poster presents the measurement of the Higgs boson simplified template production cross sections in the diphoton decay channel, using data collected in 2015 and 2016 at √s=13 TeV by the ATLAS experiment at LHC. Categories are defined to isolate various fiducial regions related to different production modes. In addition, the signal strength, defined as the ratio of the observed signal...
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Xiaowen Ren (Central China Normal University CCNU (CN))16/05/2017, 14:00
Large In LHC RUN II, the Large Hadron Collider restarted with luminosities close to the nominal performances, and with a centre-of-mass energy increase of around 60% with respect to the end of the LHC RUN I. At this new energy it is absolutely essential to restudy the general features of the pp interaction, in particular the soft or semi-hard bulk of particles that form the Underlying Event,...
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Yu Zhang16/05/2017, 14:00
A measurement of the VBF production cross section, performed in the framework of the Higgs simplified template cross section measurement, is made at sqrt(s)=13 TeV exploiting the diphoton final state. The measurement uses the full pp collision data collected in 2015 and 2016 by the ATLAS experiment at the LHC. Special emphasis is given to the optimisation of the selection and the uncertainty...
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Adam Davis (Tsinghua University (CN))16/05/2017, 14:00
Measurements of charm mixing and $CP$ violation parameters from the decay-time-dependent ratio of $ D^0 \to K^+ \pi^- $ to $ D^0 \to K^- \pi^+ $ decay rates and the charge-conjugate ratio are reported. The analysis uses $\overline{B}\to D^{*+} \mu^- X$, and charge-conjugate decays, where $D^{*+}\to D^0\pi^+$, and $D^0\to K^{\mp} \pi^{\pm}$. The $pp$ collision data are recorded by the \lhcb...
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Shuo Han (Chinese Academy of Sciences (CN))16/05/2017, 14:00
This poster presents the techniques to measure the photon identification efficiencies in the ATLAS experiment, on the proton-proton collisions collected at √s = 13 TeV, with an integrated luminosity of 3.2 fb−1 and 33.3fb-1 corresponding to 2015 and 2016. Three independent analyses have been exploited. One uses photons from radiative Z→llγ decays. The second extracts the shower shape...
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Mengzhen Wang (Tsinghua University (CN))16/05/2017, 14:00
The measurement of the mixing-induced CP-violating phase phi_s in the Bs-Bsbar system is one of the key goals of the LHCb experiment. It has been measured exploiting the Run I data set, using several decay channels. The poster shows the most recent results obtained analyzing Bs0->J/psi K+K- candidates in the K+K- mass region above the phi(1020) resonance. The poster also shows previous...
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Yi Yang (Guizhou Normal University), Wenchang Xiang (University of Colorado Boulder)16/05/2017, 14:00
Based on the framework of color glass condensate, we studied the hadron multiplicity distribution at the LHC energies, The full next-to-leading order Balitsky-Kovchegov(BK) equation is solved numerically, which obtain the NLO unintegrated gluon distribution (UGD) function in the coordinate space. We also extend the parton distribution function and the fragmentation function to NLO. A full NLO...
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Nicolo' Trevisani (Universidad de Cantabria (ES))16/05/2017, 14:00
We discuss a search for a dark matter (DM) pair production in association with a 125-GeV Higgs boson using the data collected at 13 TeV at the LHC using the CMS detector. This signature, dubbed "mono-Higgs," appears as a single Higgs boson plus missing energy from DM particles escaping the detector. The search exploits the large missing transverse energy and other kinematic variables to...
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Shu Li (Duke University (US))16/05/2017, 14:00
We present the Monte Carlo setup used by ATLAS to model
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multi-boson processes in 13 TeV $pp$ collisions. The baseline
Monte Carlo generators are compared with each other in key kinematic
distributions of the processes under study. Sample normalisation and
assignment of systematic uncertainties are discussed. -
Dr Shaobo WANG16/05/2017, 14:00
The PandaX-III is a high pressure TPC concept to search for neutrinoless double-beta decay of Xe136 with high energy resolution and sensibility at the China Jin Ping underground Laboratory II (CJPL-II). Microbulk Micromegas will be used as a charge amplification and readout system in order to reconstruct both the energy and track of the neutrinoless double-beta decay event. In the first phase...
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Mr Heng Lin (Shanghai Jiao Tong University)16/05/2017, 14:00
The PandaX-III experiment is a high pressure TPC to search for neutrinoless
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double-beta decay of Xe-136 with high energy resolution and sensitivity at the China Jin Ping underground Laboratory II (CJPL-II). A prototype was built to demonstrate this concept. Microbulk Micromegas are used as a charge amplification and readout system of the prototype in order to reconstruct both the energy and... -
Michaela Mlynarikova (Charles University (CZ))16/05/2017, 14:00
The Tile Calorimeter (TileCal) of the ATLAS experiment at the LHC is the central hadronic calorimeter designed for reconstruction of hadrons, jets, tau-particles and missing transverse energy. TileCal is a scintillator-steel sampling calorimeter and it covers the region of pseudorapidity < 1.7. The scintillation light produced in the scintillator tiles is transmitted by wavelength shifting...
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Dr xia wan (School of Physics $\&$ Information Technology, Shaanxi Normal University, Xi'an 710119, China)16/05/2017, 14:00
We show that the forward-backward asymmetry $(A_{FB})$ of the charged lepton in $gg\to H\to\gamma Z\to\gamma \ell^-\ell^+$ process could be used to probe the CP violating $H\gamma Z$ coupling when the interference of $gg\to\gamma Z\to\gamma \ell^-\ell^+$ process is included. In the presence of CP violation in $H\gamma Z$ coupling, the interference has a non-vanishing forward-backward asymmetry...
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Hugo Prager (University of Southampton)16/05/2017, 14:00
Studying how ATLAS and CMS searches for supersymmetry in the t tbar + MET final state constrain scenarios with a fermionic top partner and a dark matter candidate, we show that the efficiencies of the considered searches are quite similar for scalar and fermionic top partners. Therefore, in general, efficiency maps for stop–neutralino simplified models can also be applied to fermionic...
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Mr Dermot O'Brien (University of Southampton)16/05/2017, 14:00
This paper explores effects of both finite width and interference (with background) in the production and decay of extra heavy quarks at the Large Hadron Collider (LHC). This dynamics is normally ignored in the standard experimental searcher and we assess herein the regions of validity of current approaches. Further, we discuss the configuration of masses, widths and couplings where the latter...
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Yongke Zhao (Shandong University (CN) & LAL)16/05/2017, 14:00
A search for a high-mass resonance decaying to WW is performed in the e nu mu nu final states using pp collision data collected at sqrt(s)=13 TeV by the ATLAS detector at the Large Hadron Collider. Different hypotheses are tested, including heavy Higgs with a narrow width approximation and a large width assumption. Three orthogonal event categories are defined for the search: one ggF...
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Yanhui Ma (Shandong University (CN))16/05/2017, 14:00
A search for the decay of the Standard Model Higgs boson into
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a bb pair when produced in association with a W or Z boson has been
performed with the ATLAS detector. Data were collected in proton-proton
collisions from Run 2 of the Large Hadron Collider at a centre-of-mass
energy of 13 TeV, final states are considered that contain 0, 1 and 2
charged leptons (electrons or muons), targeting the... -
Jing Li (Peking University (CN))16/05/2017, 14:00
A search for the associated production of a standard model Higgs boson and a top quark-anti quark pair (ttH), using LHC pp collision data collected by the CMS experiment at a center of mass energy of 13 TeV in 2016. The dataset corresponds to an integrated luminosity of 12.9 fb$^{-1}$ . The analysis uses events with two leptons of the same charge or at least three charged leptons, produced...
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Yuan-Tang Chou (National Tsing Hua University (TW))16/05/2017, 14:00
A search for dark matter produced in association with a Higgs
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Boson decaying into a pair of button quarks is present, using 36.5 fb-1 of
pp collisions at a center-of-mass of 13 TeV. The Higgs boson provides a
unique way to probe the production of Dark Matter particles at Large Hadron
Collider. The decay of the Higgs boson is reconstructed as a high-momentum
bb system with either a pair of... -
Haijun Yang (Shanghai Jiao Tong University (CN))16/05/2017, 14:00
Several models beyond the Standard Model predict heavy particles decaying
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to b jets. This poster presents the searches for resonances in the di-jet
invariant mass spectrum with one or two jets identified as b-jets. The
search is performed using proton–proton collisions data with a
centre-of-mass energy of 13 TeV recorded by the ATLAS detector in the years
2015 and 2016 at the Large Hadron Collider. -
Huilin Qu (Univ. of California Santa Barbara (US))16/05/2017, 14:00
A search for direct production of top squark pairs in events with jets and large transverse momentum imbalance is presented. The data were collected in proton-proton collisions at a center-of-mass energy of 13 TeV and correspond to an integrated luminosity of 35.9 fb-1. Dedicated object reconstruction tools are developed to exploit the unique signal characteristics. No significant excess of...
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Daniela Salvatore (Universita della Calabria (IT) - INFN)16/05/2017, 14:00
Several possible extensions of the Standard Model predict the existence of
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a dark sector that is weakly coupled to the visible one: i.e. the two
sectors couple via the vector portal, where a dark photon with mass in the
MeV to GeV range mixes kinetically with the SM photon. If the dark photon
is the lightest state in the dark sector, it will decay to SM particles,
mainly to leptons and... -
Juan Gonzalez (Universidad de Oviedo (ES))16/05/2017, 14:00
Searches are presented for direct electroweak production of charginos and neutralinos in signatures with two light leptons of the same charge and with three or more leptons including up to two hadronically decaying $\tau$ leptons. The full 2016 dataset of pp collisions recorded by CMS at a center-of-mass energy of 13 TeV is used, corresponding to an integrated luminosity of 35.9 fb$^{-1}$. The...
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Jike Wang (Deutsches Elektronen-Synchrotron (DE))16/05/2017, 14:00
Still many things in our nature can not be explained by the Standard Model.
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Many of these conundrums could be addressed by some of the best motivated models currently
under exploration, such as super-symmetry (SUSY), composite Higgs models and
extended Higgs models such as two-Higgs doublet models (2HDM). Most of these
extensions require additional scalar bosons. In particular, the 2HDM... -
Qi Li (Chinese Academy of Sciences (CN))16/05/2017, 14:00
This poster presents a search for resonant and non-resonant Higgs boson pair production with one Higgs boson decaying to WW and the other one to γγ. The dataset consists of proton-proton collisions recorded at a 13 TeV centre-of-mass energy during 2015 and 2016.
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Shuo Han (Chinese Academy of Sciences (CN))16/05/2017, 14:00
his poster presents a search for new resonances decaying to Zγ and for the decays to Zγ of the 125 GeV Higgs boson. The Z bosons are identified through their decays to charged, light lepton pairs (e+e−, μ+μ−). The dataset consists of proton-proton collisions collected at √s=13 TeV with the ATLAS detector at the Large Hadron Collider. The searches are performed by looking for localised excesses...
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Mr Theodore Zorbas (University of Sheffield (GB))16/05/2017, 14:00
We present the latest results in the search for Minimal Supersymmetric Standard Model (MSSM) neutral Higgs bosons decaying to a tau-antitau pair (H/A->TauTau). We consider tau-pair decays in the Leptonic-Hadronic (LepHad) and Hadronic-Hadronic (HadHad) modes. We analyse Run 2 data recorded with the ATLAS detector, produced with proton-proton collisions at a centre-of-mass energy of 13 TeV at...
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Marc Bret Cano (Shanghai Jiao Tong University (SJTU))16/05/2017, 14:00
A search is performed for a heavy particle decaying into different flavour
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dilepton pairs (emu, etau or mutau), using 36.5 fb^{-1} of proton--proton
collision data at a centre-of-mass energy of13 TeV collected in 2015 and
2016 by the ATLAS detector at the Large Hadron Collider. No excess over the
Standard Model prediction is observed. Limits at the 95% credibility level
are set on the mass of... -
Dengfeng Zhang (Shandong University (CN))16/05/2017, 14:00
The dijet final state at high transverse momentum probes
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the highest energies reached in a collider experiment. This corresponds to
the largest reach in mass for the production of new particles, but also to
resolving the smallest distances. Several phenomena described by models of
physics beyond the Standard Model could be seen in the angular and mass
distributions of dijets. This poster shows... -
Ignacio Suarez Andres (Universidad de Oviedo (ES))16/05/2017, 14:00
A search for new physics is carried out in events with $\geq$ 3 electrons or muons and jets. Results are based on a sample of proton-proton collision data produced by the LHC at a center-of-mass energy of 13 TeV and collected by the CMS experiment in 2016. Events are classified according to the number of b-tagged jets, missing transverse momentum, hadronic transverse energy, and the invariant...
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Isabelle Helena J De Bruyn (Vrije Universiteit Brussel (BE))16/05/2017, 14:00
The existence of Dark Matter in the form of Strongly Interacting Massive Particles (SIMPs) can be motivated by astrophysical observations that challenge the classical Cold Dark Matter scenario. Although other observations greatly constrain this alternative, they do not completely exclude it. The signature of SIMPs at CMS consists of pair-produced neutral, hadron-like, trackless jets. The...
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Aniello Spiezia (Chinese Academy of Sciences (CN))16/05/2017, 14:00
We present a search for single production of heavy vector like quarks, carried out by the CMS collaboration analyzing LHC pp collisions at 13TeV. The vector like quark is a massive top quark partner that is searched for in a mass range between 0.7 and 1.7 TeV and a width between <1% and 30%. Single production can be dominant over pair production, depending on the mass of the new quark. The...
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Yang Liu (Chinese Academy of Sciences (CN))16/05/2017, 14:00
Supersymmetry (SUSY) is a well motivated extension of the Standard Model (SM) that postulates the existence of a superpartner for each SM particle. A search for strongly produced SUSY particles decaying to a pair of two isolated same-sign leptons or three leptons has been carried out using proton-proton collisions at a centre of mass of 13 TeV collected by the ATLAS experiment. The analysis...
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Menglei Sun (Carnegie-Mellon University (US))16/05/2017, 14:00
A search for supersymmetry in final states with a photon, lepton, and missing transverse momentum (MET) is presented. This final state is motivated by generalized models of gauge-mediated supersymmetry breaking with a wino-like next-to-lightest supersymmetric particle. Results are presented and interpreted using simplified supersymmetric models.
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Huajie Cheng (Chinese Academy of Sciences (CN))16/05/2017, 14:00
A search for the electroweak production of supersymmetric particles in final states with at least two hadronically decaying tau leptons and MET is presented. The analysis uses a dataset of proton–proton collisions recorded with the ATLAS detector at the Large Hadron Collider at a centre-of-mass energy of 13 TeV. Prospect of the search at the High Luminosity LHC with ATLAS detector with...
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Leonid Serkin (INFN Gruppo Collegato di Udine and ICTP Trieste (IT))16/05/2017, 14:00
A review of the searches for the SM Higgs boson produced in association with a pair of top quarks, ttH, using pp collision data at √s=13 TeV, collected with the ATLAS detector at the LHC is presented. Searches for ttH production in the diphoton and multilepton channels are summarised, and special focus is given to the most sensitive channel, with the SM Higgs boson decaying to a pair of bottom quarks.
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Sergio Sanchez Cruz (Universidad de Oviedo (ES))16/05/2017, 14:00
A search is presented for physics beyond the standard model in events with two opposite-sign, same-flavor leptons, jets and missing transverse momentum in the final state. The search is performed in a dataset of 35.9 $\mathrm{fb}^{-1}$ of $\sqrt{s} = $ 13 TeV pp collisions recorded by the CMS experiment along the year 2016. The search targets models in which a colored particle is produced....
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Sebastien Rettie (University of British Columbia (CA))16/05/2017, 14:00
The Standard Model (SM) of particle physics is a very successful predictive theory which explains the fundamental
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interactions of elementary particles in the universe, except for gravity. However, the SM is known to be an effective
theory that is valid only in a low energy regime, called the elctroweak scale, and does not account for many observed
experimental results. For example, it does not... -
Mr Qian-Fei Xiang16/05/2017, 14:00
We study a simplified scenario in the next-to-minimal supersymmetric standard model with a split electroweak spectrum, in which only the singlino and higgsinos are light and other superpartners are decoupled. Serving as a dark matter candidate, a singlino-dominated neutralino $\tilde{\chi}_1^0$ should have either resonant annihilation effects or sizable higgsino components to satisfy the...
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ATLAS Collaboration (ATLAS)16/05/2017, 14:00
The instantaneous luminosity of the Large Hadron Collider (LHC) at CERN will be increased up to a factor of five with respect to the present design value by undergoing an extensive upgrade program over the coming decade. In order to benefit from the expected high luminosity performance that will be provided by the Phase-1 upgraded LHC, the first station of the ATLAS muon end-cap Small Wheel...
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Jike Wang (Deutsches Elektronen-Synchrotron (DE))16/05/2017, 14:00
ATLAS is making extensive efforts towards preparing a detector upgrade for the
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High luminosity operations of the LHC (HL-LHC), which will commence operation
in ~10 years. The current ATLAS Inner Detector will be replaced by a
all-silicon tracker (comprising an inner Pixel tracker and outer Strip
tracker). The software currently used for the new silicon tracker is broadly
inherited from that... -
Cecile Sarah Caillol (University of Wisconsin-Madison (US))16/05/2017, 14:00
A search for a standard model Higgs boson decaying into a pair of tau leptons is performed using events recorded by the CMS experiment at the LHC in 2016. The dataset corresponds to an integrated luminosity of 35.9 fbinv at a center-of-mass energy of 13 TeV. Each tau lepton decays hadronically or leptonically, and the four final states with the largest branching fractions are considered.
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Alejandro Celis (IFIC CSIC-Universitat de Valencia)16/05/2017, 14:00
I consider the Standard Model extended by a heavy scalar singlet and derive the low-energy effective theory resulting from integrating out the heavy state. This exercise in effective field theory serves to illustrate with a simple example the systematics of the linear and nonlinear electroweak effective Lagrangians and to clarify the relation between them. I discuss power-counting aspects and...
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Shu Li (Duke University (US))16/05/2017, 14:00
The production of a $Z$ boson and a photon in association with a
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high-mass dijet system is studied using 20.2 fb$^{-1}$ of
proton–proton collision data at a centre-of-mass energy of $\sqrt{s} = 8$ TeV
recorded with the ATLAS detector in 2012 at the Large Hadron Collider.
Final states with a photon and a Z boson decaying into a pair of either electrons,
muons, or neutrinos are analysed.... -
Mr Zhen-Xing Zhao (Shanghai Jiao Tong University)16/05/2017, 14:00
In this work, we study the transition processes of doubly heavy baryons
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$\Xi_{cc}^{++}$, $\Xi_{cc}^{+}$, $\Omega_{cc}^{+}$, $\Xi_{bc}^{+}$,
$\Xi_{bc}^{0}$, $\Omega_{bc}^{0}$ and $\Omega_{bb}^{-}$. At the
quark level these transtions are depicted by the weak decays of $c\to d/s$
or $b\to u$ and the other two spectator quarks are viewed as a scalar
diquark. We first derived the form factors of... -
Kirill Prokofiev (The Hong Kong University of Science and Technology (HK))16/05/2017, 14:00
After the discovery of the Higgs boson, the precision measurements of its properties
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and comparison of results to those predicted by the Standard Model (SM) became the crucial
part of the LHC physics programme. Potential observation of deviations may lead to the
discovery of a new physics beyond the Standard Model (BSM). In this contribution, the results of
analyses of the Higgs boson... -
Valentina Cairo (Universita della Calabria (IT))16/05/2017, 14:00
The material in the ATLAS Inner Detector (ID) is studied with several methods, using a sample of √s=13 TeV pp collisions
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collected in 2015 during Run II of the LHC. The material within the innermost barrel regions of the ID is studied using
reconstructed secondary vertices from hadronic interactions and photon conversions. The layout of the cables, cooling p
ipes and support structures... -
Julia Isabell Djuvsland (Ruprecht-Karls-Universitaet Heidelberg (DE))16/05/2017, 14:00
Quartic gauge couplings are tested by this study of the production of WVγ events (where V = W or Z) in
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20.2 fb−1 of proton-proton collisions at a centre-of-mass energy of √s = 8 TeV recorded with the ATLAS detector. The
fully-leptonic final state of WWγ events containing an electron, a muon and a photon is analysed as well as
semi-leptonic final states of WVγ production containing an electron... -
Javier Montejo Berlingen (CERN)16/05/2017, 14:00
The LHC, at design capacity, has a bunch-crossing rate of 40 MHz whereas the ATLAS experiment has an average recording rate of about 1 kHz. To reduce the rate of events, but maintain high selection efficiency for rare events such as physics signals beyond the Standard Model, a two-level trigger system is used. Events are selected based on physics signatures such as presence of energetic...
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Mr Xiangxiang Ren (Shanghai Jiao Tong university)16/05/2017, 14:00
The PandaX-IV(Particle AND Astrophysical Xenon phase IV) project is a dark matter direct detection experiment with dual-phase xenon located in the China JinPing Underground Laboratory phase-II(CJPL-II). As the result of 120kg PandaX-I has been released in May 2015 and the 500kg PandaX-II will stop data taking in 2018, the upgraded experiment, PandaX-IV, will contain 4 tons of xenon in the...
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M. Ayub Faridi (CHEP), Mrs Abeeha Batool (CHEP, University of the Punjab), Mrs Sadia Nazir (CHEP)16/05/2017, 14:00
We discuss quantum mechanical directions where a mini black hole at LHC behaves like a "particle", even if with a unique property: its linear size grows with the energy. The curved dynamics is explained in terms of a particle moving in gravitational potential. The particle turning-points match the radius of the inner and outer horizons of a Reissner–Nordström black hole. Further we compute a...
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Maosen Zhou (Chinese Academy of Sciences (CN))16/05/2017, 14:00
In Refs. arXiv:1506.0061 and arXiv:1606.0167 the compatibility of LHC data taken until 2012 with a heavy scalar with a mass around 270 GeV have been discussed. The features of the data and the phenomenological framework studied there are reviewed. A number of predictions are made, including the anomalous production of multiple leptons. The decay of this heavy scalar includes the Higgs...
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Mr Bin Yan (Peking university)16/05/2017, 14:00
We study the soft gluon radiation effects for the $t$-channel single top quark production at the LHC.
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By applying the transverse momentum
dependent factorization formalism, the large logarithms about the small total transverse momentum ($q_\perp$)
of the single-top plus one-jet final state system, are resummed
to all orders in the expansion of the strong interaction coupling at the accuracy of... -
Michaela Mlynarikova (Charles University (CZ))16/05/2017, 14:00
The Tile Calorimeter (TileCal) is the hadronic calorimeter covering the central region of the ATLAS detector at the LHC. It is a sampling calorimeter consisting of alternating thin steel plates and scintillating tiles. Wavelength shifting fibers coupled to the tiles collect the produced light and are read out by photomultiplier tubes. Currently, an analog sum of the processed signal of several...
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Xingguo Li (Shanghai Jiao Tong University (CN))16/05/2017, 14:00
A measurement of
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the production cross section for two isolated photons in proton-proton collisions at a
centre-of-mass energy of √ s = 8 TeV is presented. The results are based on an integrated luminosity of 20.24 fb−1
recorded by the ATLAS detector at the Large Hadron Collider. The measurement considers photons with
pseudorapidities satisfying |η γ | < 1.37 or 1.56 < |η γ | < 2.37 and...