ENFPC 2019

Informações Gerais

• Datas: 01 a 05 de Setembro de 2019
• Local: Campos do Jordão, SP
• Hotel:
  • Nome:
  • Endereço:
  • Telefone de Reserva:

• Datas Limites:
  • Inscrições: 10/05
    • Data limite para os que desejam (doutores) apoio da FAPESP
    • Acréscimo de 25% após o prazo
  • Submissão de Resumos: 10/05
  • Pagamento de Inscrições: 31/07

Resumos

Instruções

• Data Limite:
• Entre 200 e 400 palavras
• Formato LateX

Posters

Ana

• Área: HEX - Física Experimental de Altas Energias
• Título:
• Autores: *Ana Maria Slivar, Eduardo Gregores
• Instituição: SPRACE-UFABC
• Resumo: Physics beyond the Standard Model is one of the main objectives of the CMS experiment, and the existence of Dark Matter (DM) is already known for its cosmological signals, what allows its search in particle accelerators. Given that DM particles should not interact with the detectors, such particles can be searched for in the form of missing transverse energy (MET), the so called mono-X searches (X \+ MET). A simplified model is used to approach this kind of new Physics, considering DM as a Dirac fermion and a new mediator between DM and SM particles as a neutral scalar boson. Due to the high weight and energy of the mediator, if a Z boson recoils against it, the products of its decay will have a higher energy and be collimated. The main backgrounds for a mono-Z search are ZZ, WZ and WW production, with a dilepton signature and some missing energy. This study will show possible cuts for the signal improvement. A preliminary work was done for a graduation project using just standalone tools, such as MadGraph and Pythia for generation and ROOT for analysis. Now, beyond the generation tools, the CMSSW framework is used for data treatment and analysis to make this search similar to the ones done at the experiment.

Breno

• Área: HEX - Física Experimental de Altas Energias
• Título: Search for the dark Higgs in High Energy Collisions
• Autores: *Breno Orzari, Thiago Tomei
• Instituição: SPRACE-Unesp
• Resumo: Nowadays the idea that some type of Dark Matter (DM) exists in the universe is already very widespread. There are many different models that are trying to predict the properties of the DM particles. One of them is the dark Higgs model, where a heavy mediator $Z'$ can emit a dark Higgs ($d_{H}$), via the dark Higgs-strahlung process, and then decay into a pair of DM fermions ($\chi\chi$). The dark Higgs mixes with the standard model Higgs, which decays preferably into a $b\bar{b}$ pair and can be detected by modern particle detectors. If the missing transverse energy (MET) of the process is high enough, the bottom quark jets may merge into a fat jet, that will reduce the amount of background for this signal (MET + FatJet). That signal can be mimicked by four processes (the background) which are: $Z+b\bar{b}$, $W+b\barb$, Diboson processes ($ZZ$, $WZ$, $WW$) and $t\bar{t}, if the charged leptons are not identified in the processes containing $W$ bosons. We present here a preliminary study on the feasibility of a search for the signal generated by the dark Higgs model, mainly concerning a primitive estimation of its background that will be detected by the CMS experiment of the LHC at $\sqrt{s}=13$ TeV.

Dener

• Área: HEX - Física Experimental de Altas Energias
• Título: $K^{0}_{\ s}K^{0}_{\ s}$ Bose-Einstein Correlations in pPb@8.16 TeV at CMS Detector
• Autores: César A. Bernardes, *Dener S. Lemos, Sandra S. Padula, Sunil M. Dogra, Wei Li?
• Instituição: SPRACE-Unesp, KNU, Rice University?
• Resumo: Two-particle Bose-Einstein correlations (BEC) are a powerfull method for probing the space-time geometry of the particle-emitting source in relativistic high-energy collisions. These correlations are sensitive to the quantum statistics of identical particles as well as the strong and/or Coulomb interactions between particles. This poster presents the first $K^{0}_{\ s}K^{0}_{\ s}$ BEC measurement with the data from the LHC Run II collected by CMS detector in proton-lead (pPb) collisions at $\sqrt{s_{\hbox{\tiny NN}}} = $ 8.16 TeV. The $K^{0}_{\ s}$ is a particle which decays into $\pi^{+}\pi^{-}$, the reconstruction and the study to remove the background contributions are present in this work. As a neutral particle we can use the $K^{0}_{\ s}K^{0}_{\ s}$ BEC to study the contribution of strong interactions in this correlations. The one-dimensional BEC radii $R_{\mathrm{inv}}$ results are presented as a function of mean transverse pair momentum ($k_{\mathrm{T}}$ and of the charged particle multiplicity (N_{\mathrm{trk}}), in order to study the dynamical behavior of the emitting source. This analysis is performed for both minimum-bias and high-multiplicity samples and we also compare this results with BEC measurement for charged hadrons at pPb@8.16 TeV.

Eduardo

• Área: DCE - Divulgação e Ensino da Física Nuclear e de Partículas Elementares
• Título: SPRACE-UFABC International MasterClass
• Autores: André Lessa, *Eduardo Gregores, Lucio Costa, Pedro Mercadante
• Instituição: SPRACE-UFABC
• Resumo: The International Masterclasses - Hands on Particle Physics at UFABC is part of the scientific dissemination action of the European Organization for Nuclear Research (CERN) and Large Hadron Collider (LHC) in partnership with universities and research centres in different countries. It is a 2-day event in which High School students and teachers have the opportunity to know scientific works and discuss concepts of Elementary Particle Physics with researchers in the area of High Energy Physics and of Science Teaching. During the event, participants work with real data produced at the LHC, analyzing some events in particle physics using software provided free of charge by CERN's organizing team. The results obtained by the groups in different countries are presented and discussed simultaneously in videoconference, conducted by researchers who are in the LHC. The day before the videoconference, lectures on particle physics and LHC researches are held, as well as other activities related to scientific dissemination. We will present the highlights of its 2019 edition, held on March 28th and 29th at Santo André campus of UFABC. It was the 6th consecutive edition of this event, started on 2014 by approximetly the same team, with support from the Dean of Outreach and Culture of the university.

Isabela

• Área: DCE - Divulgação e Ensino da Física Nuclear e de Partículas Elementares
• Título: International Masterclass events at São Paulo Research and Analysis Center (SPRACE)
• Autores: *Isabela Maietto Silvério, Sandra Padula, on behalf of SPRACE
• Instituição: SPRACE-UNESP
• Resumo: The International Masterclass is an event designed by Large Hadron Collider (LHC) researchers to promote science to high school students and show them how physics can be a fascinating subject. Students can have a day of learning, but outside the classroom. Events are held at universities and research centers so that students can have experience of what a Physicist's life is like, and that by studying physics it is possible to understand some of the great mysteries of the universe, such as: "What are the elementary particles that form the universe and how do they interact with each other?". The International Masteclass covers about 55 countries and around 215 Institutions worldwide. In Brazil, SPRACE had its first edition of the event in 2008 and over the years the number of participants and students only increased. In SPRACE, three different categories of Masterclass are held: beginner, advanced and since 2017, the feminine, in order to encourage students to enter science. In addition, an activity is held for the teachers, together with the beginner Masterclass, so that they can have a training and thus, in the future, apply the knowledge in the classroom.

Tulio

• Área: HEX - Física Experimental de Altas Energias
• Título:
• Autores: Eduardo Gregores, *Tulio Cardoso
• Instituição: UFABC
• Resumo: One of the main ways of search for Dark Matter (DM) at the Large Hadron Collider (LHC), more specifically at the Compact Muon Solenoid Experiment (CMS), is performed through the mono-photon signature. Since this kind of matter do not have electric charge, the detectors can not record their productions. Using the experiment reconstruction algorithm it's posible to infer a quantity denominated by missing transverse energy (MET), that is the energy needed to energy conservation.

César

• Área: HEX - Física Experimental de Altas Energias
• Título: Two-particle Bose-Einstein Correlations Measurements in proton-proton collisions at $13~\mathrm{TeV}$ using the CMS detector
• Autores: *César A. Bernardes, Sandra S. Padula, Sunil M. Dogra, Máté Csanád
• Instituição: SPRACE-Unesp, Kyungpook National University, Eötvös University
• Resumo: Femtoscopic two-particle Bose-Einstein correlations (BEC) are important in the study of the space-time properties of particle emitting systems created in hadronic and nucleonic ultrarelativistic collisions. In this presentation, we summarize the final results of an BEC analysis in proton-proton (pp) collisions at $\sqrt{s} = 13~\mathrm{TeV}$ using the CMS detector at LHC. We pay special attention to events with high charged particle multiplicities (HM), where a ridge-like azimuthal correlation (ridge) was observed. The ridge structure in pp, also present in heavy-ions collisions and in these systems understood to be a consequence of the formation of a Quark-Gluon Plasma phase, is a topic of intense debate. Studies of the space-time evolution of these systems could help to shed light on the origin of these phenomena. Using BEC techniques we measure the one-dimensional size of the particle emitting region (lenghts of homogeneity) and correlation intensity as functions of event charged particle multiplicity, mean transverse momentum of the two-particle (k_{\mathrm{T}}) and the transverse mass of the pair (m_{\mathrm{T}}). We use three different analyses techniques for the measurements and compare our results qualitatively with some predictions based on the Color-Glass effective theory, Hydrodynamics models, and also with previous measurements from the ATLAS and the CMS collaborations.

Apresentações Orais

Sandra

• Área: DCE - Divulgação e Ensino da Física Nuclear e de Partículas Elementares
• Título: SPRACE Outreach Initiatives and Activities
• Autores: Sandra S. Padula, Pedro G. Mercadante, Valéria S. Dias, Nelson Barrelo Junior, Fernando L. C. Carvalho, Cleide M. Rizzatto
• Instituições: Unesp, UFABC, Usp, UFF, IFSP
• Resumo: The initiatives and activities developed by the São Paulo Research and Analysis CEnter (SPRACE) along more than a decade will be reported and discussed. They englobe the creation and distribution of a poster about Particle Physics and the Standard Model, a video grame that introduces playfully the building blocks of matter, as well as the International MasterClasses coordinated by the International Particle Physics Outreach Group (IPPOG), related to CERN. These events have the goal to show to High School students and teachers how is the professional life of an experimental high energy physicist working at CERN. It starts by presenting introductory lectures on Particle Physics and detectors, and then preparing the audience to analyze real data produced by the CERN Large Hadron Collider (LHC). After analyzing the data, the students have the opportunity to discuss the results in a video conference coordinated by moderators at CERN. These activities at SPRACE are complemented by several demonstrations and educational games. SPRACE also organizes periodically workshops dedicated to the formation and update of High School teachers and undergraduate students who will soon become teachers. SPRACE has a long-standing partnership with the São Paulo Secretary of State for Education and with teachers of private high schools.

Thiago

• Área: HEX - Física Experimental de Altas Energias
• Título: Machine Learning Techniques for HL-LHC Tracking in CMS
• Autores: R. Cobe, J. Fialho, R. Iope, A. Santos, S. Stanzani, *T. Tomei
• Instituição: SPRACE-Unesp
• Resumo: The High-Luminosity LHC (HL-LHC) is the next challenge in the HEP scenario, bringing the collider’s instantaneous luminosity to 75 Hz/nb and increasing in 5 times the amount of additional pp interactions in the same or neighboring bunch crossings, referred to as pileup (PU). At an average pileup of 140, in its standard configuration, the HL-LHC will deliver to CMS a data throughput of approximately 30 GB/s, doubling to 60 GB/s at the ultimate (PU = 200) configuration. Already on 2027, the CMS experiment estimates a need of 2.2 EB of disk, 3 EB of tape and 4.4M CPI cores, with only 200 to 300/fb of data collected. At the end of the full LHC + HL-LHC experimental run, the total collected luminosity will be on the order of 3000/fb. In order to deal with the increased amount of generated data and the complexity of the simulations, new techniques and frameworks have to be deployed and/or developed. In that scenario, the Deep Neural Networks (DNN) revolution can make a significant impact on HEP. These techniques are most promising when there are both a large amount of data and a high number of features. We report on the exploration of the usage of advanced machine learning techniques for tracking at the HL-LHC, using the same dataset that was used for the TrackML Kaggle challenge.

Dener

• Área: PHE - Fenomenologia Hadrônica e de Partículas Elementares
• Título: CHESS: Complete Hydrodynamical Evolution SyStem
• Autores: *Dener S. Lemos, Otavio Socolowski Jr., Sandra S. Padula
• Instituição: SPRACE-Unesp, FURG
• Resumo: Under certain conditions of high energy density and temperature it is possible to observe the transition between the ordinary matter (made by hadrons) to quark-gluon plasma (QGP), where the quarks and gluons are not trapped. The QGP can be created in relativistic heavy-ion collisions, such as done at RHIC and LHC. One way to study such a complex system formed in the collisions is by using the hydrodynamic model. The application of this model is grounded in the hypothesis that this system will reach, rapidly, a local thermodynamic equilibrium state, and in the fact that system shows a collectivity behavior. Recently, experimental results have shown evidence of a similar behavior in small colliding systems (pp and pPb collisions) at high multiplicity. The Complete Hydrodynamic Evolution SyStem (CHESS) is a phenomenological package created to compare the results with the RHIC and LHC data. This code is designed to describe all the evolution of system formed in both heavy-ion collisions and small colliding systems using the hydrodynamical model (viscous and ideal) in 2+1 dimensions (boost invariance). The structure of the package is given by the three public codes connected by scripts in python language. With this code is possible to calculate many observables and compare with data, for example: rapidity distributions, invariant momentum distribution, flow and HBT effect.

Eduardo

• Área: HEX - Física Experimental de Altas Energias
• Título: Sao Paulo Research and Analysis Center — SPRACE
• Autores: *Eduardo Gregores, on behalf of SPRACE
• Instituição: Unesp, USP, UFABC
• Resumo: The São Paulo Research and Analysis Center (SPRACE) is active in the areas of fundamental science, high performance computing and digital innovation. Created in 2003, with the support of the Sao Paulo Research Foundation (FAPESP), SPRACE enables the participation of São Paulo researchers in the Compact Muon Solenoid (CMS) experiment from the Large Hadron Collider (LHC) at the European Organization for Nuclear Research (CERN). The center operates a Tier 2 (BR-SP-SPRACE) of the Worldwide LHC Computing Grid (WLCG), a computational structure that processes, analyses and stores part of the data generated by the experiment. The engineer team works on the development of the Data Acquisition electronics that will be implemented in the upgraded CMS tracking detector for the Phase-II operation of the experiment. SPRACE has several partnerships with the private sector to develop digital innovation projects, with emphasis on High Performance Computing (HPC), Machine Learning and Software Defined Networking (SDN). Its team has developed Kytos, the open-source SDN platform for network control that has been used in AmLight 's international link. Besides the analysis on Heavy Ion and Exotica Physics CMS data, computing processing, hardware development and the many spin-offs, SPRACE also has been pursuing a strong program on particle physics dissemination and education.

Luigi

• Área: HEX - Física Experimental de Altas Energias
• Título: The Phase-2 upgrade of the CMS tracker detector
• Autores: Andre Cascadan, Eduardo Gregores, *Luigi Calligaris, Vitor Finotti
• Institutions: Unesp, UFABC
• Resumo: The CMS experiment will perform a major upgrade of its detectors during Long Shutdown 3 (2024-2026), preparing them for the operation at the High Luminosity LHC. The tracker detector will be completely replaced by a new design, designed to cope with the increased pile-up, data flow and radiation. We introduce the challenges faced by the experiments in the future HL-LHC conditions, the proposed solutions for the CMS Tracker, and the current state of the research and development work aimed towards a successful completion of this upgrade.

-- gregores - 2019-04-25