Conveners
Physics at High Energies: Parallel 1 — Standard Model Tests | Theory
- Toyoko Orimoto (Northeastern University)
- Verena Martinez Outschoorn (UMass Amherst)
Physics at High Energies: Parallel 2 — Higgs Physics
- Verena Martinez Outschoorn (UMass Amherst)
- Toyoko Orimoto (Northeastern University)
Physics at High Energies: Parallel 4 — Physics Beyond the Standard Model I
- Verena Martinez Outschoorn (UMass Amherst)
- Toyoko Orimoto (Northeastern University)
Physics at High Energies: Parallel 5 — Physics Beyond the Standard Model II
- Stefania Gori (University of Cincinnati)
Physics at High Energies: Parallel 9 — LHC Future | Theory
- Verena Martinez Outschoorn (UMass Amherst)
- Stefania Gori (University of Cincinnati)
Dr
Margherita Spalla
(Max Planck Institute for Physics - Munich)
29/05/2018, 14:00
PHE
Parallel
The large integrated luminosities that are available at the LHC, allow to test the gauge structure of the electroweak sector of the Standard Model to highest precision. In this talk, we review the latest results of the ATLAS collaboration involving di-boson and multiboson final states, the electroweak production of vector bosons as well as their constraints of effective field theory...
Tobias Neumann
(Illinois Tech / Fermilab)
29/05/2018, 14:30
PHE
Parallel
During recent years calculations including fixed order approximations and resummation have decreased theoretical uncertainties on Higgs cross sections tremendously. Most exciting results have been published just this year. I present an overview of recent and most recent developments in Higgs precision physics calculations that allow theory predictions to compete with experimental precision...
Dr
Seyda Ipek
(UC Irvine)
29/05/2018, 14:55
PHE
Parallel
We know neutrinos have mass, but we don't know how they get their masses. Many models augment the Standard Model with right-handed neutrinos, either Dirac or Majorana, to generate the neutrino masses. I will show that in R-symmetric supersymmetric models, the bino and its Dirac partner the singlino can play the role of right-handed neutrinos. In this mechanism the neutrino masses are generated...
Aniket Joglekar
(UC Riverside)
29/05/2018, 15:20
PHE
Parallel
The Higgs pair production in gluon fusion is a sensitive probe of Beyond-Standard Model (BSM) phenomena and its detection is a major goal for the LHC and higher energy hadron collider experiments. We reanalyze the possible modifications of the Higgs pair production cross section within low energy supersymmetry models allowed by the current LHC search bounds, where we analyze the combined...
Mr
Tatsuya MASUBUCHI
(The University of Tokyo, International Center for Elementary Particle Physics)
29/05/2018, 16:10
PHE
Parallel
Measurements and searches of Higgs boson decays to two third- or two
second-generation quarks or leptons are presented using 36 fb$^{-1}$ of $pp$
collision data collected at 13 TeV.
Mr
Jannik Geisen
(II. Physikalisches Institut, Georg-August-Universitaet Goettingen)
29/05/2018, 16:30
PHE
Parallel
The search for the production of the Higgs Boson with a pair of $t\bar{t}$ quarks is both very important and very challenging. This talk presents the analyses using Higgs boson decays to $b\bar{b}$ pairs, to two $Z$ bosons, to other multi-lepton final states, and to a pair of photons, using 36 fb$^{-1}$ of $pp$ collision data collected at 13 TeV, as well as their combined results.
Lucrezia Stella Bruni
(NIKHEF)
29/05/2018, 16:55
PHE
Parallel
Measurements of Higgs boson properties and cross sections measured in Higgs boson decays to two photons, two $Z$ bosons, and two $W$ bosons based on $pp$ collision data collected at 13 TeV are presented. In addition, results from the combination of different decay channels are shown.
Mr
Elliot Reynolds
(University of Birmingham)
29/05/2018, 17:20
PHE
Parallel
Theories beyond the Standard Model predict Higgs boson decays at a much
enhanced rate compared to the Standard Model, e.g. for decays to $Z$+photon,
or a meson and a photon, or decays that do not exist in the Standard Model,
such as decays into two light bosons (a). This talk presents recent results
based on 36 fb$^{-1}$ of $pp$ collision data collected at 13 TeV.
Dr
Da Liu
(Argonne National Laboratory)
29/05/2018, 17:45
PHE
Parallel
Precision measurements at the LHC can provide probes of new physics, and they are complementary to direct searches. The high energy distribution of di-boson processes ($WW,WZ,Vh$) is a promising place, with the possibility of significant improvement in sensitivity as the data accumulates. We focus on the semi-leptonic final states, and make projections of the reach for future runs of the LHC...
Dr
Seodong Shin
(University of Chicago / Yonsei University)
29/05/2018, 18:10
PHE
Parallel
I will discuss models with extended Higgs doublets and extra heavy fermions. In this scenario, a promising way of searching both the neutral heavy Higgs and vectorlike fermion signals at the LHC is observing the heavy Higgs cascade decay into a vectorlike fermion which subsequently decays into $W$, $Z$ gauge bosons or the SM Higgs boson. In this talk, I will also show the signal sensitivities...
Arnaud Ferrari
(Uppsala University)
30/05/2018, 16:10
PHE
Parallel
Di-Higgs final states can arise through non-resonant production of two Higgs bosons and through potential heavy states decaying to two Higgs bosons. This talk presents searches in several Higgs boson decay channels using 36 fb$^{-1}$ of $pp$ collision data recorded at 13 TeV.
Mrs
Ana Elena Dumitriu
(IFIN,CPPM)
30/05/2018, 16:30
PHE
Parallel
Several theories beyond the Standard Model predict the existence of high
mass neutral or charged Higgs particles. In this presentation the latest
ATLAS results on searches for these particles based on 36 fb$^{-1}$ of $pp$
collision data collected at 13 TeV will be discussed.
Dr
James Hirschauer
(FNAL)
30/05/2018, 16:50
PHE
Parallel
With the collection of approximately 90 fb$^{-1}$ of proton-proton collision data at center-of-mass collision energy of 13 TeV since 2015, CMS is probing high mass supersymmetry (SUSY) parameter space with large datasets for the first time. The talk will first review results of the standard searches for strongly produced natural SUSY, and highlight corners of phase space where SUSY could still...
Dr
Siyuan Sun
(University of Michigan)
30/05/2018, 17:10
PHE
Parallel
This talk will explore the results of current searches that utilize top and bottom quarks at ATLAS, including searches for 3rd Generation SUSY particles, searches for BSM Higgs, and searches for other exotic particles.
Ines Ochoa
(Columbia University)
30/05/2018, 17:30
PHE
Parallel
Many extensions to the Standard Model predicts new particles decaying into two bosons ($W$, $Z$, $\gamma$, $H$) making these important signatures in the search for new physics. Searches for such diboson resonances have been performed in final states with different numbers of leptons, photons and jets and $b$-jets where new jet substructure techniques to disentangle the hadronic decay products...
Angelo Monteux
(UC Irvine)
30/05/2018, 17:50
PHE
Parallel
We describe a novel, model-independent technique of "rectangular aggregations" for mining the LHC data for hints of new physics. A typical (CMS) search now has hundreds of signal regions, which can hide the presence of potentially interesting anomalies. Applying our technique to the two CMS jets+MET SUSY searches, we identify a set of previously overlooked $\sim3\sigma$ excesses, characterized...
Prof.
Nikolaos Kidonakis
(Kennesaw State University)
30/05/2018, 18:10
PHE
Parallel
I discuss charged-Higgs production via two different processes: in association with a top quark, and in association with a $W$ boson. I present total cross sections and differential distributions that include higher-order corrections from soft and collinear gluon emission. I show that these radiative corrections are significant.
Mr
Sebastien Rettie
(The University of British Columbia)
31/05/2018, 14:00
PHE
Parallel
Many theories beyond the Standard Model predict new phenomena which decay to well isolated, high-$p_t$ leptons. Searches for new physics models with these signatures are performed using the ATLAS experiment at the LHC. The results reported here use the $pp$ collision data sample collected by the ATLAS detector at the LHC with a centre-of-mass energy of 13 TeV.
Prof.
Sunil Somalwar
(Rutgers University/Dept of Physics)
31/05/2018, 14:30
PHE
Parallel
Discovery of the Higgs boson at the Large Hadron Collider completed the Standard Model puzzle. However, we still do not know why the Higgs boson is light, what is the makeup of the dark matter, how matter survived in the evolution of the universe, etc. LHC's treasure-trove of proton-proton collision data could allow us to better understand the mysteries of the nascent universe and the Higgs...
Chris Murphy
(Brookhaven)
31/05/2018, 15:00
PHE
Parallel
The ATLAS and CMS collaborations have recently released significant new data on Higgs and diboson production in LHC Run 2. Measurements of Higgs properties have improved in many channels, while kinematic information for $h\to\gamma\gamma$ and $h\to ZZ$ can now be more accurately incorporated in fits using the STXS method, and $W^+W^−$ diboson production at high $p_{_\mathrm{T}}$ gives new...
Brian Shuve
(Harvey Mudd College)
31/05/2018, 15:20
PHE
Parallel
I discuss examples of how the LHC can be sensitive to low-mass hidden sectors. In particular, I show how rare $Z$-boson decays provide a window into the mass-generation mechanism of dark-photon models, motivating searches for displaced vertices and high multiplicities of soft leptons.
Mr
Olmo Cerri
(Caltech)
02/06/2018, 16:10
PHE
Parallel
As part of the Phase II upgrade program, the Compact Muon Solenoid (CMS) detector will incorporate a new timing layer designed to measure minimum ionizing particles (MIPs) with a time resolution of $\sim$30 ps. Precision timing will mitigate the impact of the challenging levels of pileup expected at the High Luminosity LHC. The time information assigned to each track will enable the use of...
Peilian Liu
(UC Berkeley)
02/06/2018, 16:35
PHE
Parallel
The Large Hadron Collider (LHC) has been successfully delivering proton-proton collision data at the unprecedented center of mass energy of 13 TeV. An upgrade is planned to increase the instantaneous luminosity delivered by the LHC in what is called the HL-LHC, aiming to deliver a total of up to 3,000 fb$^{-1}$ to 4,000 fb$^{-1}$ of data per experiment. To cope with the expected data-taking...
Irene Dutta
(Caltech)
02/06/2018, 17:00
PHE
Parallel
The Compact Muon Solenoid (CMS) detector at the CERN Large Hadron Collider (LHC) is undergoing an extensive Phase II upgrade program to prepare for the challenging conditions of the High-Luminosity LHC (HL-LHC). A new timing layer is designed to measure minimum ionizing particles (MIPs) with a time resolution of $\sim$30 ps and hermetic coverage up to a pseudo-rapidity of $|\eta|=3$. This MIP...
Mr
Benoit Lefebvre
(McGill University)
02/06/2018, 17:25
PHE
Parallel
The instantaneous luminosity of the Large Hadron Collider at CERN will be increased up to a factor of five with respect to the design value. To maintain excellent detection and background rejection capability in the forward region of the ATLAS detector, part of the muon detection system will be upgraded during the LHC long shutdown period of 2019–2020, with the complete replacement of the...
Dr
Raffaele Tito D'Agnolo
(SLAC)
02/06/2018, 17:50
PHE
Parallel
After an introduction to machine learning from the perspective of a theoretical physicist, I will describe a new method to perform a model independent search for new phenomena, with an emphasis on the LHC. I will discuss a systematic way to address the look-elsewhere effect and other issues that led similar attempts to fail in the past.
Dr
Ran Huo
(UC Riverside)
02/06/2018, 18:10
PHE
Parallel
We apply the covariant derivative expansion method to integrate out the neutralinos and charginos in the minimal supersymmetric Standard Model. The results are presented as set of pure bosonic dimension-six operators in the Standard Model effective field theory. In global fitting to the proposed leptonic collider constraint projections, special phenomenological emphasis is paid to the gaugino...
