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Proceedings of Sixth Annual Conference on Large Hadron Collider Physics — PoS(LHCP2018)最新文献

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QCD at forward rapidity, in ultra-peripheral collisions, and multi-parton interactions QCD在前进速度，在超外围碰撞，和多部分子相互作用
Proceedings of Sixth Annual Conference on Large Hadron Collider Physics — PoS(LHCP2018) Pub Date : 2018-09-04 DOI: 10.22323/1.321.0108
E. Kryshen, A. Alice, LHCb collaborations
{"title":"QCD at forward rapidity, in ultra-peripheral collisions, and multi-parton interactions","authors":"E. Kryshen, A. Alice, LHCb collaborations","doi":"10.22323/1.321.0108","DOIUrl":"https://doi.org/10.22323/1.321.0108","url":null,"abstract":"The LHC is a unique laboratory to perform studies of diffractive processes, photon-induced reactions and multi-parton interactions and explore various aspects of non-perturbative QCD such as Pomeron structure, low-x evolution of parton density functions and the dynamics of hadron collisions at non-perturbative scales. Recent results on these subjects from the ALICE, ATLAS, CMS, LHCb and TOTEM collaborations at the LHC are reviewed.","PeriodicalId":346295,"journal":{"name":"Proceedings of Sixth Annual Conference on Large Hadron Collider Physics — PoS(LHCP2018)","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121982317","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
CP violation in $B^{0}_{(s)}rightarrow h^{+}h^{-}$ CP违反B在$ ^ {0}_ {(s)} rightarrow h ^ {+} h ^ {-} $
Proceedings of Sixth Annual Conference on Large Hadron Collider Physics — PoS(LHCP2018) Pub Date : 2018-09-04 DOI: 10.22323/1.321.0063
Davide Fazzini
{"title":"CP violation in $B^{0}_{(s)}rightarrow h^{+}h^{-}$","authors":"Davide Fazzini","doi":"10.22323/1.321.0063","DOIUrl":"https://doi.org/10.22323/1.321.0063","url":null,"abstract":"An important test of the Standard Model is represented by the charmless charged two-body $b$-hadron decays to final states with kaons and pions. In fact the $C!P$ asymmetries measured using these decays are sensitive to new physics beyond the Standard Model since the decay amplitudes receive contributions from loop-level diagrams with magnitudes similar to those from tree-level transitions. \u0000We report the most recent results on the charmless textit{b}-hadron two-body decays obtained by the LHCb experiment using the data collected in Run~1 (3 fb$^{-1}$).","PeriodicalId":346295,"journal":{"name":"Proceedings of Sixth Annual Conference on Large Hadron Collider Physics — PoS(LHCP2018)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129758009","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
Latest results on single electroweak boson production from the CMS experiment CMS实验中单电弱玻色子产生的最新结果
Proceedings of Sixth Annual Conference on Large Hadron Collider Physics — PoS(LHCP2018) Pub Date : 2018-09-04 DOI: 10.22323/1.321.0298
M. Cipriani
{"title":"Latest results on single electroweak boson production from the CMS experiment","authors":"M. Cipriani","doi":"10.22323/1.321.0298","DOIUrl":"https://doi.org/10.22323/1.321.0298","url":null,"abstract":"The production of W and Z bosons is one of the most prominent examples of hard scattering \u0000processes at hadron colliders. The measurements of the corresponding inclusive and differential \u0000cross sections provide important tests of perturbative quantum chromodynamics and parton dis- \u0000tribution functions. Moreover, these processes constitute the main source of background for the \u0000searches for dark matter or other exotic final states, making the precise knowledge of W and Z \u0000boson kinematic spectra a fundamental tool to search for new physics. This paper reports a sum- \u0000mary of the latest measurements of single electroweak boson production carried out by the CMS \u0000experiment at the CERN Large Hadron Collider. They are based on data collected at a center-of- \u0000mass energy of 8 or 13 TeV. The measurements are performed exploiting the decay of W and Z \u0000bosons into electrons or muons, which provide a clean experimental final state with a low level \u0000of background. Results are corrected to the stable-particle level through unfolding techniques \u0000and compared with theoretical predictions obtained using several generators, allowing to validate \u0000different models for the parton shower and hard scattering processes. The main features of the \u0000selected analyses are illustrated and their role in the consolidation and development of our current \u0000knowledge of the electroweak sector is highlighted. Finally, the prospects for new measurements \u0000using the full dataset collected by CMS at 13 TeV by the end of 2018 are briefly discussed as well.","PeriodicalId":346295,"journal":{"name":"Proceedings of Sixth Annual Conference on Large Hadron Collider Physics — PoS(LHCP2018)","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127556146","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
Probing New Physics in $B → πK$ Decays 探索$B→πK$衰变的新物理学
Proceedings of Sixth Annual Conference on Large Hadron Collider Physics — PoS(LHCP2018) Pub Date : 2018-09-04 DOI: 10.22323/1.321.0176
R. Fleischer, R. Jaarsma, E. Malami, K. Vos
{"title":"Probing New Physics in $B → πK$ Decays","authors":"R. Fleischer, R. Jaarsma, E. Malami, K. Vos","doi":"10.22323/1.321.0176","DOIUrl":"https://doi.org/10.22323/1.321.0176","url":null,"abstract":"Over the last two decades the $B to pi K$ decays have received a lot of attention. They are particularly interesting since the main contribution to these decays comes from QCD penguin topologies. Furthermore, electroweak penguin amplitudes give a contribution comparable to the tree topologies. In the past, a discrepancy was found in the correlation between the CP asymmetries of $B_d^0 to pi^0 K_{rm S}$. We give an up-to-date picture of this situation and consider new constraints, finding that the effect has become larger. An attractive explanation is offered by a modified electroweak penguin sector. We employ an isospin relation between the amplitudes of the $B to pi K$ decays to determine the relevant parameters, making only minimal use of the $SU(3)$ flavour symmetry. Another essential constraint is provided by the mixing-induced CP asymmetry of $B_d^0 to pi^0 K_{rm S}$. The application of our strategy at the next generation of $B$-physics experiments may establish New Physics and reveal new sources of CP violation in the electroweak penguin sector.","PeriodicalId":346295,"journal":{"name":"Proceedings of Sixth Annual Conference on Large Hadron Collider Physics — PoS(LHCP2018)","volume":"357 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124499860","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
Event generators for heavy-ion physics, recent developments 重离子物理的事件发生器，最新进展
Proceedings of Sixth Annual Conference on Large Hadron Collider Physics — PoS(LHCP2018) Pub Date : 2018-09-03 DOI: 10.22323/1.321.0215
G. Gustafson
{"title":"Event generators for heavy-ion physics, recent developments","authors":"G. Gustafson","doi":"10.22323/1.321.0215","DOIUrl":"https://doi.org/10.22323/1.321.0215","url":null,"abstract":"A short review is presented for the most commonly used general purpose event generators for heavy ion physics, HIJING, AMPT, and EPOS. A new model, called Angantyr, is presented. It is (similar to HIJING) an \u0000extrapolation of pp dynamics to collisions with nuclei. Diffractive \u0000excitation of individual nucleons has significant effects in nucleus \u0000collisions, and here Angantyr is the first model which accounts for nucleon excitation in both projectile and target nuclei. General features in pA and AA collisions are well reproduced. Future studies aim to investigate effects of fluctuations in more detail, and to also include effects of a high string density on collective effects, like high strangeness production and transverse flow.","PeriodicalId":346295,"journal":{"name":"Proceedings of Sixth Annual Conference on Large Hadron Collider Physics — PoS(LHCP2018)","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116738328","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
Search for pair- and single-production of vector-like quarks in final states with at least one Z boson decaying into a pair of electrons or muons in pp collision data collected with the ATLAS detector at $sqrt{s}$= 13 TeV 用ATLAS探测器在$sqrt{s}$= 13 TeV收集的pp碰撞数据中，寻找具有至少一个Z玻色子衰变成一对电子或μ子的最终态的类矢量夸克对和单产夸克
Proceedings of Sixth Annual Conference on Large Hadron Collider Physics — PoS(LHCP2018) Pub Date : 2018-09-03 DOI: 10.22323/1.321.0017
E. M. Freundlich
{"title":"Search for pair- and single-production of vector-like quarks in final states with at least one Z boson decaying into a pair of electrons or muons in pp collision data collected with the ATLAS detector at $sqrt{s}$= 13 TeV","authors":"E. M. Freundlich","doi":"10.22323/1.321.0017","DOIUrl":"https://doi.org/10.22323/1.321.0017","url":null,"abstract":"A search for pair- and single-production of vector-like quarks $T$ and $B$ with a leptonically decaying $Z$ boson is presented. \u0000The data were collected in $pp$ collisions at $sqrt{s}=13,text{TeV}$ with the ATLAS detector at the LHC, corresponding to an integrated luminosity of $36.1,text{fb}^{-1}$. \u0000Final states are required to contain a $Z$ boson reconstructed from a same-flavor pair of leptons with opposite electric charge and a third generation quark. \u0000The analysis targets both pair- and single-production of vector-like quarks and no excess above the Standard Model expectation is found. \u0000Lower mass limits on vector-like $T$ and $B$ quarks at 95% confidence level are derived and limits on the coupling to Standard Model quarks are set for single-production.","PeriodicalId":346295,"journal":{"name":"Proceedings of Sixth Annual Conference on Large Hadron Collider Physics — PoS(LHCP2018)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130336102","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: 6
Searches for long-lived particles with the CMS experiment 用CMS实验寻找长寿命粒子
Proceedings of Sixth Annual Conference on Large Hadron Collider Physics — PoS(LHCP2018) Pub Date : 2018-09-03 DOI: 10.22323/1.321.0282
Viktor Kutzner
{"title":"Searches for long-lived particles with the CMS experiment","authors":"Viktor Kutzner","doi":"10.22323/1.321.0282","DOIUrl":"https://doi.org/10.22323/1.321.0282","url":null,"abstract":"The current status of the searches for exotic, long-lived particles with the CMS experiment at $sqrt{s}=13$ TeV is presented. Many theories beyond the Standard Model predict long-lived particles, for which different search approaches are utilized from those used in prompt searches. The searches discussed include the latest results at the time of the conference and cover a wide range of signatures. Searches for exotic, long-lived particles using inclusive displaced jets, displaced vertices in multijet events, disappearing tracks, heavy stable charged particles, and stopped particles are discussed, as well as reinterpretations of two recently published prompt searches, which complement the dedicated searches. The search and results are summarized for each analysis.","PeriodicalId":346295,"journal":{"name":"Proceedings of Sixth Annual Conference on Large Hadron Collider Physics — PoS(LHCP2018)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130113204","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
Probing and Distinguishing Representations at the LHC 在大型强子对撞机上探测和区分表征
Proceedings of Sixth Annual Conference on Large Hadron Collider Physics — PoS(LHCP2018) Pub Date : 2018-09-03 DOI: 10.22323/1.321.0002
A. Costantini
{"title":"Probing and Distinguishing Representations at the LHC","authors":"A. Costantini","doi":"10.22323/1.321.0002","DOIUrl":"https://doi.org/10.22323/1.321.0002","url":null,"abstract":"The discovery made at the Large Hadron Collider (LHC) has revealed that the spontaneous symmetry breaking mechanism is realised in a gauge theory such as the Standard Model (SM) by at least one Higgs doublet. However, the possible existence of other scalar bosons cannot be excluded. We analyze signatures extensions of the SM, characterized by an extra representations of scalars, in view of the recent and previous Higgs data. We show that such representations can be probed and distinguished, mostly with multileptonic final states, with a relatively low luminosity at the LHC.","PeriodicalId":346295,"journal":{"name":"Proceedings of Sixth Annual Conference on Large Hadron Collider Physics — PoS(LHCP2018)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133514665","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
Explaining Physics to a Lay Audience 向外行人解释物理学
Proceedings of Sixth Annual Conference on Large Hadron Collider Physics — PoS(LHCP2018) Pub Date : 2018-09-03 DOI: 10.22323/1.321.0302
T. Virgili
{"title":"Explaining Physics to a Lay Audience","authors":"T. Virgili","doi":"10.22323/1.321.0302","DOIUrl":"https://doi.org/10.22323/1.321.0302","url":null,"abstract":"","PeriodicalId":346295,"journal":{"name":"Proceedings of Sixth Annual Conference on Large Hadron Collider Physics — PoS(LHCP2018)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115417878","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
A word from the Early Career Scientists in the LHC experiments 来自大型强子对撞机实验的早期职业科学家的一句话
Proceedings of Sixth Annual Conference on Large Hadron Collider Physics — PoS(LHCP2018) Pub Date : 2018-09-03 DOI: 10.22323/1.321.0129
M. Muškinja
{"title":"A word from the Early Career Scientists in the LHC experiments","authors":"M. Muškinja","doi":"10.22323/1.321.0129","DOIUrl":"https://doi.org/10.22323/1.321.0129","url":null,"abstract":"Early Career Scientists (ECSs) make up a large fraction of the High Energy Physics community and contribute to the scientific programmes across all projects and activities. In the experiments at the Large Hadron Collider, students alone compose about half of the scientific authors. All four large experiments--ALICE, ATLAS, CMS and LHCb--recognize the importance of the well-being and general satisfaction of the young researchers and its correlation with the performance of the collaboration as a whole. In recent years, boards representing ECSs were formed in each of the four collaborations. These boards consist of a diverse group of young scientists who meet regularly among themselves, gather feedback from the entire early-career community, advise the management in the best interests of the young physicists in the collaboration, and organize social events. This talk overviews the history of the LHC early-career boards, their recent activities, the feedback of the young communities, and the plans for the future.","PeriodicalId":346295,"journal":{"name":"Proceedings of Sixth Annual Conference on Large Hadron Collider Physics — PoS(LHCP2018)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133302320","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
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