The division of HEP welcomes your contributed research abstract for the ANPA 2021 conference. The topics included in this division include but not limited to:
Theoretical and Experimental High Energy Physics, Nuclear Physics, Particle Physics, etc.
Abstract Submission Closed!
Deadline: June 1st, 2021
Thank you for your support. We will update you with the latest programs soon!
Invited Speaker
Hunting Dibaryons, Learning Mesons, Unboxing Hadronization: Lets Figure QCD!
Abstract:
Quantum Chromodynamics (QCD) is the theory of strong interaction between quarks and gluons that make up hadrons such as nucleons, the building blocks of matter. Physicists have been striving to understand its dynamics as well as properties since its inception. Some theories have been realized using experiments, while some experiments could lead to new theories that boost our understanding of the strong force mechanism. The CLAS6 detector housed in the Hall-B at Jefferson Lab, Virginia has been a valuable magnifying lens in the medium energy regime for many experimentalists, who probe various properties of hadrons by studying different physics processes as well as phenomena. In this talk, I will present an overview of the studies using the data from CLAS experiments that I am involved in to investigate the properties of mesons, baryons, and dibaryons – with one ultimate goal of “understanding QCD”.
Session Sechdule
| Date/Time: ET: July 17, 2021 04:00 PM Nepal: July 18, 2021 01:45 AM |
Abstract Number: ANPA2021_0186
Presenting Author: Shreyashi Chakdar (Invited) Title: A Symmetric Two Higgs Doublet Model Show/Hide Abstract After the null-discovery of any additional scalar states in the post-125GeV Higgs era in the Large Hadron Collider, the electroweak sector demands to be studied with respect to all possible theoretical efforts to look for any new physics signatures. In this work we present a symmetric two Higgs doublet model with a discrete interchange symmetry between the two Higgs doublets (?_1 ? ?_2). As a consequence, other than the SM-like scalar state (h) with m_h = 125 GeV, the model has several distinguishing features including the pseudoscalar (A), the charged scalars(H^�) and the neutral scalar H, which do not have any direct coupling to fermions. The neutral scalar H can have mass lighter than the 125 GeV SM-like Higgs state h. Due to the presence of a residual Z_2 symmetry after the Spontaneous Symmetry Breaking (SSB), the neutral scalar H can emerge as a feasible Dark Matter candidate in this scenario. As an outcome of this possibility, the SM-like scalar h may have an extra invisible decay mode of h ? H H in this framework. We propose the framework and discuss some of the interesting features with a guideline of possible phenomenological searches at the LHC present in this scenario.
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| Date/Time: ET: July 17, 2021 04:30 PM Nepal: July 18, 2021 02:15 AM |
Abstract Number: ANPA2021_0187
Presenting Author: Abhishek Karna Title: The Delta Analysis : A Detailed Study Of Energetic, Emittance, Dimensions and Radiobiological Properties of Delta Rays Show/Hide Abstract This research proposal aims to study the beam properties of delta electrons and establish experimental data to extrapolate the potential useful applications of ??-rays. The ??-rays have very less penetration, from few micrometers to millimeters. This property might show promising results in its radiobiological use. Moreover, the radial dose distribution, beam emittance, linear energy transfer and other properties of delta rays can help us find other prospective areas for its use. The information used and presented in this proposal are retrieved from different books, journals and research papers of different scientists. There are no primary data and hence, the past data and facts included are based upon previous published researches. This proposal makes a detailed analysis of the methods of studying ??-rays and presents possibilities of overwhelming importances of these secondary electrons in the contemporary scientific researches of particle physics and biophysics.
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| Date/Time: ET: July 17, 2021 04:45 PM Nepal: July 18, 2021 02:30 AM |
Abstract Number: ANPA2021_0188
Presenting Author: Santosh Parajuli Title: Search for Higgs Boson Pair Production in the Multi-lepton Final State Using Proton-Proton Collision Data at $\sqrt{s} =13$ TeV from the ATLAS Detector Show/Hide Abstract This talk will present a search strategy for Higgs boson pair-production in final states with three electrons or muons. The analysis is performed using an integrated luminosity of 139 fb$^{-1}$ of $pp$ collision at $\sqrt{s}= 13$ TeV collected by the ATLAS detector at the LHC. There are many decay modes of Higgs boson pairs that have low branching ratios, and many of these are not covered by dedicated analyses. Some example modes of particular interest for a three lepton final state are WWWW, WW$\tau \tau$, $\tau \tau \tau \tau$, etc. This talk presents the development of a multivariate strategy (boosted decision trees) and current work on background estimation methods and statistical analysis.
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| Date/Time: ET: July 17, 2021 05:00 PM Nepal: July 18, 2021 02:45 AM |
Abstract Number: ANPA2021_0189
Presenting Author: Prajita Bhattarai Title: Precision Measurements of Vector Boson Collision at the LHC to Probe New Physics Show/Hide Abstract The Standard Model of elementary particle physics describes the fundamental particles in nature and their interaction. Experimental results from the Large Hadron Collider (LHC) so far have confirmed the predictions of the standard model. However, the presence of dark matter, matter-antimatter asymmetry in nature, and the experimentally measured anomalous magnetic dipole moment of the muon confirm that the Standard Model is incomplete. There are two main approaches to search for beyond the Standard Model physics in LHC, direct searches and precision measurements of the SM predicted quantities. This talk will motivate the precision measurements of the heavy vector-boson collisions in the electroweak sector of the Standard Model to probe new physics beyond Standard Model
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| Date/Time: ET: July 17, 2021 05:15 PM Nepal: July 18, 2021 03:00 AM |
Abstract Number: ANPA2021_0190
Presenting Author: Taya N Chetry (Invited) Title: Hunting Dibaryons, Learning Mesons, Unraveling Hadronization: Lets Figure QCD! Show/Hide Abstract Quantum Chromodynamics (QCD) is the theory of strong interaction between quarks and gluons that make up hadrons such as nucleons, the building blocks of matter. Physicists have been striving to understand it dynamics as well as properties since its inception. Some theories have been realized using experiments, while some experiments could lead to new theories that boost our understanding of the strong force mechanism. The CLAS6 detector housed in the Hall-B at Jefferson Lab, Virginia has been a valuable magnifying lens in the medium energy regime for many experimentalists, who probe various properties of hadrons by studying different physics processes as well as phenomena. In this talk, I will present an overview of the studies using the data from CLAS experiments that I am involved in to investigate the properties of mesons, baryons and dibaryons – with one ultimate goal of “understanding QCD”.
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| Date/Time: ET: July 17, 2021 05:45 PM Nepal: July 18, 2021 03:30 AM |
Abstract Number: ANPA2021_0191
Presenting Author: Yadav Pandit (Invited) Title: Recent results on azimuthal correlations in Heavy Ion Collisions Show/Hide Abstract The study of azimuthal correlations in relativistic nuclear collisions has potential to offer insight into the early stage of the system’s evolution. Azimuthal correlations are normally reported in terms of Fourier coefficients i. e. v1, v2 etc. Directed flow is quantified by the first harmonic (v1) in the Fourier expansion of the particle�s azimuthal distribution with respect to the reaction plane. This talk will focus on the recent results of directed flow measured for the charged and identified particles versus pseudo-rapidity, and the collision centrality at various energies at RHIC and LHC. We also discuss recent model calculation trying to explain these experimental results.
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| Date/Time: ET: July 17, 2021 06:15 PM Nepal: July 18, 2021 04:00 AM |
Abstract Number: ANPA2021_0192
Presenting Author: Pratik Kafle Title: Optimization of sensitivity for the Di-Higgs search in $b\Bar{b}l\nu qq$ final state in the LHC data recorded by the ATLAS detector in $pp$ collisions at $\sqrt{s}$ = 13 TeV Show/Hide Abstract A study of optimization of signal sensitivity in the search for the diHiggs event in the ATLAS experiment is presented where one of the Higgs bosons decays via the $H \xrightarrow{} b\Bar{b}$ channel and the other via $H \xrightarrow{} WW^{*}$ with $b\Bar{b}l\nu qq$ as the final state. A large irreducible background contamination from $t\Bar{t}$ decay significantly decreases the signal sensitivity in the diHiggs search. We employ ROOT’s built-in Multivariate analysis tool (TMVA) to train new physics-motivated variables along with currently trained variables. An increment in the rejection of $t\Bar{t}$ background while keeping the signal efficiency high is observed.
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