Bulletin of the American Physical Society
84th Annual Meeting of the APS Southeastern Section
Volume 62, Number 13
Thursday–Saturday, November 16–18, 2017; Milledgeville, Georgia
Session C1: Energy Frontier |
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Chair: Brad Cox, University of Virginia Room: MSU Building Banquet Room A |
Thursday, November 16, 2017 1:30PM - 2:00PM |
C1.00001: Understanding the fundamental nature of the universe using the ATLAS detector at the LHC Invited Speaker: Mark Kruse After a brief reflection on the accomplishments of the ATLAS experiment from “Run 1” of the LHC with proton-proton collisions at 7 and 8 TeV, I will give an overview of results thus far from Run 2, at 13 TeV collision energy. With the exceptional performance of the LHC, the resulting data is pushing the Standard Model of particle physics to its limits, and constraining possibilities for its successor. I will survey the status of searches for some of these possibilities. [Preview Abstract] |
Thursday, November 16, 2017 2:00PM - 2:30PM |
C1.00002: The CMS Detector Upgrades and Recent Physics Results Invited Speaker: Paolo Rumerio While continuing to collect and analyze LHC collision data to probe the predictions of the Standard Model and look for any sign of new physics, the CMS experiment is also undergoing a first sequence of upgrades of its detector, and establishing the design of the future upgrades for the High Luminosity LHC. In this talk, I will give a summary of the ongoing and future CMS upgrades and summarize a selection of recent CMS physics results. [Preview Abstract] |
Thursday, November 16, 2017 2:30PM - 3:00PM |
C1.00003: Overview of the Recent ALICE Experimental Results Invited Speaker: Adam Matyja The ALICE experiment is dedicated to studies of the quark-gluon plasma (QGP), which is created in heavy ion collisions at extreme conditions with very high temperature and energy density. This state of matter was present at the early stage of the universe. The Large Hadron Collider (LHC) accelerator provides the opportunity to recreate this unique state of matter in Pb- Pb collisions, where the properties of nuclear matter can be investigated. Studies of less complex systems like pp or p-Pb collisions provide a reference for heavy ion collisions and allow for studies of cold nuclear matter effect studies. During LHC Run 1 and Run 2 the ALICE experiment has collected data at center of mass energies ranging from 0.9 TeV to 13 TeV, the highest energy available at the colliding machine. The ALICE experiment also recorded p-Pb collisions at $\sqrt{s_{\rm pA}} = 5.02$ and 8.16 TeV and Pb-Pb collisions at $\sqrt{s_{\rm AA}} = 2.76$ and 5.02 TeV. Selected recent results from the ALICE experiment will be shown. [Preview Abstract] |
Thursday, November 16, 2017 3:00PM - 3:30PM |
C1.00004: Fun with mirror fermions: The search for the origin of neutrino masses at the LHC and beyond. Invited Speaker: Pham (P. Q.) Hung The seesaw mechanism is the most elegant way to give neutrinos tiny masses, less than O(eV). In a generic model, $m_{\nu} \sim m_D^2/M_R$, where $m_D \propto O(\Lambda_{EW} \sim 246 GeV)$ is the “Dirac” mass and $M_R$, the mass of right-handed neutrinos, which is generically very large (typically GUT mass scale). Right-handed neutrinos in such models are {\em sterile}, i.e.they do not interact with W and Z bosons. (There is {\em absolutely} no reason why they should be sterile.) Such a generic scenario makes it impossible to completely test the seesaw mechanism at current and future accelerators. Can one unravel the mysteries of the origin of neutrino masses at the LHC? Yes provided right-handed neutrinos are {\em non-sterile} (or {\em fertile}). This is what the Electroweak-scale right-handed neutrinos or EW-$\nu_R$ model set out to accomplish. The seesaw mechanism can be fully tested at the LHC. What are the characteristics and achievements of the EW-$\nu_R$ model? Its gauge group is still $SU(3)_C \times SU(2)_W \times U(1)_Y$. It contains mirror fermions with characteristic decay signatures such as {\em displaced vertices}. It satisfies electroweak precision data represented by the parameters $S$, $T$ and $U$. It accommodates the 125-GeV scalar and, in fact, came up with two radically different solutions, both of which give signal strengths compatible with experiment. The discovery of mirror fermions and $\nu_R$ with masses {\em naturally} proportional to $\Lambda_{EW}$ (displaced vertices, like-sign dileptons,..) and associated scalars at the LHC will completely test the seesaw mechanism and unravel the origin of neutrino masses. [Preview Abstract] |
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