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LHC Search Strategy for Squarks in Higgsino-LSP Scenarios with Leptons and b-Jets in the Final State 最终状态为轻子和b-射流的Higgsino-LSP场景下的LHC搜索策略
Inhaled particles Pub Date : 2022-06-13 DOI: 10.3390/particles5030023
E. Arganda, Antonio Delgado, R. Morales, M. Quir'os
{"title":"LHC Search Strategy for Squarks in Higgsino-LSP Scenarios with Leptons and b-Jets in the Final State","authors":"E. Arganda, Antonio Delgado, R. Morales, M. Quir'os","doi":"10.3390/particles5030023","DOIUrl":"https://doi.org/10.3390/particles5030023","url":null,"abstract":"The higgsino Lightest Supersymmetric Particle (LSP) scenario opens up the possibility of decays of strongly produced particles to an intermediate neutralino, due to the Yukawa-suppressed direct decays to the higgsino. Those decays produce multijet signals with a Higgs or a Z boson being produced in the decay of the intermediate neutralino to the LSP. In this paper, we study the discovery prospects of squarks that produce b-jets and leptons in the final state. Our collider analysis provides signal significances at the 3σ level for luminosities of 1 ab−1, and at the 5σ level if we project these results for 3 ab−1.","PeriodicalId":75932,"journal":{"name":"Inhaled particles","volume":"68 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85904251","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Approaches to Measuring Direct Photon Yield in A–A Collisions A-A碰撞中直接光子产率的测量方法
Inhaled particles Pub Date : 2022-06-09 DOI: 10.3390/particles5020017
D. Peresunko
{"title":"Approaches to Measuring Direct Photon Yield in A–A Collisions","authors":"D. Peresunko","doi":"10.3390/particles5020017","DOIUrl":"https://doi.org/10.3390/particles5020017","url":null,"abstract":"An overview of experimental methods for measuring direct photon spectra in pp, p–A and A–A collisions is presented. The advantages and limitations of each method are discussed and illustrated by the results of various experiments.","PeriodicalId":75932,"journal":{"name":"Inhaled particles","volume":"163 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77300011","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Defining the Underlying-Event Activity in the Presence of Heavy-Flavour Processes in Proton-Proton Collisions at LHC Energies 在大型强子对撞机能量下质子-质子碰撞中存在重味过程的基础事件活动的定义
Inhaled particles Pub Date : 2022-06-01 DOI: 10.3390/particles5030021
L'aszl'o Gyulai, Szende S'andor, R. V'ertesi
{"title":"Defining the Underlying-Event Activity in the Presence of Heavy-Flavour Processes in Proton-Proton Collisions at LHC Energies","authors":"L'aszl'o Gyulai, Szende S'andor, R. V'ertesi","doi":"10.3390/particles5030021","DOIUrl":"https://doi.org/10.3390/particles5030021","url":null,"abstract":"We present a systematic analysis of heavy-flavour production in the underlying event in connection to a leading hard process in pp collisions at s=13 TeV, using the PYTHIA 8 Monte Carlo event generator. We compare results from events selected by triggering on the leading hadron, as well as those triggered with reconstructed jets. We show that the kinematics of heavy-flavour fragmentation complicates the characterisation of the underlying event, and the usual method which uses the leading charged final-state hadron as a trigger may wash away the connection between the leading process and the heavy-flavour particle created in association with that. Events triggered with light or heavy-flavour jets, however, retain this connection and bring more direct information on the underlying heavy-flavour production process, but may also import unwanted sensitivity to gluon radiation. The methods outlined in the current work provide means to verify model calculations for light and heavy-flavour production in the jet and the underlying event in great details.","PeriodicalId":75932,"journal":{"name":"Inhaled particles","volume":"17 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78195428","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
R-Symmetries and Curvature Constraints in A-Twisted Heterotic Landau–Ginzburg Models A-Twisted异质性Landau-Ginzburg模型中的r -对称性和曲率约束
Inhaled particles Pub Date : 2022-05-31 DOI: 10.3390/particles6030047
R. Garavuso
{"title":"R-Symmetries and Curvature Constraints in A-Twisted Heterotic Landau–Ginzburg Models","authors":"R. Garavuso","doi":"10.3390/particles6030047","DOIUrl":"https://doi.org/10.3390/particles6030047","url":null,"abstract":"In this paper, we discuss various aspects of a class of A-twisted heterotic Landau–Ginzburg models on a Kähler variety X. We provide a classification of the R-symmetries in these models which allow the A-twist to be implemented, focusing on the case in which the gauge bundle is either a deformation of the tangent bundle of X or a deformation of a sub-bundle of the tangent bundle of X. Some anomaly-free examples are provided. The curvature constraint imposed by supersymmetry in these models when the superpotential is not holomorphic is reviewed. Constraints of this nature have been used to establish properties of analogues of pullbacks of Mathai–Quillen forms which arise in the correlation functions of the corresponding A-twisted or B-twisted heterotic Landau–Ginzburg models. The analogue most relevant to this paper is a deformation of the pullback of a Mathai–Quillen form. We discuss how this deformation may arise in the class of models studied in this paper. We then comment on how analogues of pullbacks of Mathai–Quillen forms not discussed in previous work may be obtained. Standard Mathai–Quillen formalism is reviewed in an appendix. We also include an appendix which discusses the deformation of the pullback of a Mathai–Quillen form.","PeriodicalId":75932,"journal":{"name":"Inhaled particles","volume":"116 3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83725617","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The Novel Scaling of Tsallis Parameters from the Transverse Momentum Spectra of Charged Particles in Heavy-Ion Collisions 重离子碰撞中带电粒子横向动量谱中Tsallis参数的新标度
Inhaled particles Pub Date : 2022-05-09 DOI: 10.3390/particles5020013
Junqi Tao, Weihao Wu, Meng Wang, Hua Zheng, Wenchao Zhang, Lilin Zhu, A. Bonasera
{"title":"The Novel Scaling of Tsallis Parameters from the Transverse Momentum Spectra of Charged Particles in Heavy-Ion Collisions","authors":"Junqi Tao, Weihao Wu, Meng Wang, Hua Zheng, Wenchao Zhang, Lilin Zhu, A. Bonasera","doi":"10.3390/particles5020013","DOIUrl":"https://doi.org/10.3390/particles5020013","url":null,"abstract":"The transverse momentum (pT) spectra of charged particles measured in Au + Au collisions from the beam energy scan (BES) program, Cu + Cu collisions at sNN=62.4, 200 GeV at the RHIC and Pb + Pb, Xe + Xe collisions at the LHC are investigated in the framework of Tsallis thermodynamics. The theory can describe the experimental data well for all the collision systems, energies and centralities investigated. The collision energy and centrality dependence of the Tsallis distribution parameters, i.e., the temperature T and the nonextensive parameter q, for the A + A collisions are also studied and discussed. A novel scaling between the temperature divided by the natural logarithm of collision energy (T/lns) and the nonextensive parameter q is presented.","PeriodicalId":75932,"journal":{"name":"Inhaled particles","volume":"56 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81802521","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Experimental Determination of the QCD Effective Charge αg1(Q) QCD有效电荷αg1(Q)的实验测定
Inhaled particles Pub Date : 2022-05-02 DOI: 10.3390/particles5020015
A. Deur, V. Burkert, J. Chen, W. Korsch
{"title":"Experimental Determination of the QCD Effective Charge αg1(Q)","authors":"A. Deur, V. Burkert, J. Chen, W. Korsch","doi":"10.3390/particles5020015","DOIUrl":"https://doi.org/10.3390/particles5020015","url":null,"abstract":"The QCD effective charge αg1(Q) is an observable that characterizes the magnitude of the strong interaction. At high momentum Q, it coincides with the QCD running coupling αs(Q). At low Q, it offers a nonperturbative definition of the running coupling. We have extracted αg1(Q) from measurements carried out at Jefferson Lab that span the very low to moderately high Q domain, 0.14≤Q≤2.18 GeV. The precision of the new results is much improved over the previous extractions and the reach in Q at the lower end is significantly expanded. The data show that αg1(Q) becomes Q-independent at very low Q. They compare well with two recent predictions of the QCD effective charge based on Dyson–Schwinger equations and on the AdS/CFT duality.","PeriodicalId":75932,"journal":{"name":"Inhaled particles","volume":"44 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78073076","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 14
Rabi Frequency Management of Collapsing Quasi-Two-Dimensional Bose-Einstein Condensates with Pseudospin-1/2 赝自旋为1/2的坍缩准二维玻色-爱因斯坦凝聚的Rabi频率管理
Inhaled particles Pub Date : 2022-04-28 DOI: 10.3390/particles5020012
Shukhrat N. Mardonov, B. Ahmedov
{"title":"Rabi Frequency Management of Collapsing Quasi-Two-Dimensional Bose-Einstein Condensates with Pseudospin-1/2","authors":"Shukhrat N. Mardonov, B. Ahmedov","doi":"10.3390/particles5020012","DOIUrl":"https://doi.org/10.3390/particles5020012","url":null,"abstract":"The collapse of quasi-two-dimensional pseudospin-1/2 Bose-Einstein condensate of attracting atoms with intra- and cross-spin interaction is studied in the presence of the Rabi coupling. The condensate dynamics is presented as a function of the self-interaction and Rabi frequency. The evolution of two components of the condensate by using the Gross-Pitaevskii equations is investigated. The initial Gaussian ansatz for two-component wave functions is selected for the better interpretation of the numerical results. The intra-spin-coupling modifies the critical number of atoms causing the collapse while the collapse is observed only in a single pseudospin component. It is demonstrated that for cross-spin-coupling only double spin-components collapse can occur.","PeriodicalId":75932,"journal":{"name":"Inhaled particles","volume":"19 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78427731","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of Protoneutron Star Magnetized Envelops in Neutrino Energy Spectra 中微子能谱中质子中子星磁化包络层的影响
Inhaled particles Pub Date : 2022-04-12 DOI: 10.3390/particles5020011
V. N. Kondratyev, Tamara D. Lobanovskaya, D. Torekhan
{"title":"Effect of Protoneutron Star Magnetized Envelops in Neutrino Energy Spectra","authors":"V. N. Kondratyev, Tamara D. Lobanovskaya, D. Torekhan","doi":"10.3390/particles5020011","DOIUrl":"https://doi.org/10.3390/particles5020011","url":null,"abstract":"The neutrino dynamics in hot and dense magnetized matter, which corresponds with protoneutron star envelopes in the core collapse supernova explosions, is considered. The kinetic equation for a neutrino phase space distribution function is obtained, taking into account inelastic scattering by nuclear particles. The transfer component in a momentum space using transport properties is studied. The energy transfer coefficient is shown to change from positive to negative values when the neutrino energy exceeds four times the matter temperature. In the vicinity of a neutrino sphere, such effects are illustrated to lead to the energy strengthening in the neutrino spectra. As this paper demonstrates, such a property is favorable for the possibility of observing supernova neutrino fluxes using Large Volume Neutrino Telescopes.","PeriodicalId":75932,"journal":{"name":"Inhaled particles","volume":"10 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84755170","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Multiplicity Distribution and KNO Scaling of Charged Particles Production from pp Collisions at Different Energies 不同能量pp碰撞产生带电粒子的多重分布和KNO标度
Inhaled particles Pub Date : 2022-03-31 DOI: 10.3390/particles5020009
M. Mahmoud
{"title":"Multiplicity Distribution and KNO Scaling of Charged Particles Production from pp Collisions at Different Energies","authors":"M. Mahmoud","doi":"10.3390/particles5020009","DOIUrl":"https://doi.org/10.3390/particles5020009","url":null,"abstract":"The multiplicity distribution of charged particles produced from proton–proton collisions at energies s = 2.36, 2.76, 5, 7, 8, 10, 13 and 14 TeV were studied in the present work. Furthermore, multiplicity distribution was studied in different pseudorapidity regions ∣η∣ < 0.5, 1, 1.5, 2, and 2.5. KNO scaling was studied at the same pseudorapidity regions. This is valid in the pseudorapidity region ∣η∣ < 0.5, but with increasing pseudorapidity, the violation increases. The influence of MPI and color reconnection in violation of KNO scaling were studied. The relation between mean multiplicity and collisions energy was explored, noted that it increases with the increasing energy of collisions.","PeriodicalId":75932,"journal":{"name":"Inhaled particles","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78715327","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Track Reconstruction in a High-Density Environment with ALICE 基于ALICE的高密度环境下的轨迹重建
Inhaled particles Pub Date : 2022-03-10 DOI: 10.3390/particles5010008
M. Arslandok, E. Hellbär, M. Ivanov, R. Münzer, J. Wiechula
{"title":"Track Reconstruction in a High-Density Environment with ALICE","authors":"M. Arslandok, E. Hellbär, M. Ivanov, R. Münzer, J. Wiechula","doi":"10.3390/particles5010008","DOIUrl":"https://doi.org/10.3390/particles5010008","url":null,"abstract":"ALICE is the dedicated heavy-ion experiment at the CERN Large Hadron Collider (LHC). Its main tracking and particle-identification detector is a large volume Time Projection Chamber (TPC). The TPC has been designed to perform well in the high-track density environment created in high-energy heavy-ion collisions. In this proceeding, we describe the track reconstruction procedure in ALICE. In particular, we focus on the two main challenges that were faced during the Run 2 data-taking period (2015–2018) of the LHC, which were the baseline fluctuations and the local space charge distortions in the TPC. We present the corresponding solutions in detail and describe the software tools that allowed us to circumvent these challenges.","PeriodicalId":75932,"journal":{"name":"Inhaled particles","volume":"120 4 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76290785","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
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