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Proceedings of 18th International Conference on B-Physics at Frontier Machines — PoS(Beauty2019)最新文献

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Heavy flavour production at LHCb LHCb重口味生产
Proceedings of 18th International Conference on B-Physics at Frontier Machines — PoS(Beauty2019) Pub Date : 2020-06-12 DOI: 10.22323/1.377.0025
M. Rotondo
{"title":"Heavy flavour production at LHCb","authors":"M. Rotondo","doi":"10.22323/1.377.0025","DOIUrl":"https://doi.org/10.22323/1.377.0025","url":null,"abstract":"","PeriodicalId":125063,"journal":{"name":"Proceedings of 18th International Conference on B-Physics at Frontier Machines — PoS(Beauty2019)","volume":"83 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125422949","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
Charmless b-hadron decays at LHCb 无魅力b强子在LHCb中衰变
Proceedings of 18th International Conference on B-Physics at Frontier Machines — PoS(Beauty2019) Pub Date : 2020-02-23 DOI: 10.22323/1.377.0022
D. O’Hanlon
{"title":"Charmless b-hadron decays at LHCb","authors":"D. O’Hanlon","doi":"10.22323/1.377.0022","DOIUrl":"https://doi.org/10.22323/1.377.0022","url":null,"abstract":"Violation of charge-parity ($C!P$) symmetry in the Standard Model is driven by a single global phase, however manifestations of $C!P$ violating quantities are often non-trivial due to the role of the strong interaction in generating observable $C!P$ violation effects. Here we explore how the role of the strong phase in $B^+ rightarrow pi^+pi^+pi^-$ decays, described by the intermediate resonance structure and final-state rescattering effects, governs the manifestation of large $C!P$ violation. Significant $C!P$ violation is observed in the scalar and tensor contributions, along with the first observation of $C!P$ violation in the interference between two competing decay amplitudes. Additionally $P$ and $C!P$ violation are tested for in the phase-space of $Lambda_b^0 rightarrow p^+pi^-pi^+pi^-$ decays using model-independent triple-product asymmetry and energy-test methods, with a first observation of $P$ violation in $b$-baryon decays.","PeriodicalId":125063,"journal":{"name":"Proceedings of 18th International Conference on B-Physics at Frontier Machines — PoS(Beauty2019)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125206002","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
Charm decays 魅力衰变
Proceedings of 18th International Conference on B-Physics at Frontier Machines — PoS(Beauty2019) Pub Date : 2020-02-16 DOI: 10.22323/1.377.0048
Ulrich Nierste
{"title":"Charm decays","authors":"Ulrich Nierste","doi":"10.22323/1.377.0048","DOIUrl":"https://doi.org/10.22323/1.377.0048","url":null,"abstract":"I discuss hadronic decays of $D$ mesons with emphasis on the recent discovery of charm CP violation in $D^0to K^+K^-,pi^+pi^-$ decays. The measured difference $Delta a_{CP} , equiv ; a_{CP}^{mathrm{dir}}(D^0rightarrow K^+K^-) - a_{CP}^{mathrm{dir}}(D^0rightarrowpi^+pi^-) = ; (-15.4pm 2.9)cdot 10^{-4}$ of two direct CP asymmetries exceeds the SM prediction by a factor of 7. A possible explanation is an enhancement of the penguin amplitude entering $ a_{CP}^{mathrm{dir}}$ by QCD effects which are not understood yet. Alternatively, $Delta a_{CP}$ could be dominated by contributions from new physics. In order to distinguish these two hypotheses further CP asymmetries should be measured. To this end CP asymmetries resulting from the interference of two tree-level amplitudes auch as $a_{CP}^{mathrm{dir}}(D^0rightarrow K_SK_S)$ or $a_{CP}^{mathrm{dir}}(D^0 to K^{*0} K_S)$ are especially interesting.","PeriodicalId":125063,"journal":{"name":"Proceedings of 18th International Conference on B-Physics at Frontier Machines — PoS(Beauty2019)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125173218","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
Radiative decays at LHCb LHCb的辐射衰减
Proceedings of 18th International Conference on B-Physics at Frontier Machines — PoS(Beauty2019) Pub Date : 2020-02-10 DOI: 10.22323/1.377.0020
P. Krokovny
{"title":"Radiative decays at LHCb","authors":"P. Krokovny","doi":"10.22323/1.377.0020","DOIUrl":"https://doi.org/10.22323/1.377.0020","url":null,"abstract":"The radiative decay Lambda_b -> Lambda gamma is observed for the first time using a data sample of proton-proton collisions corresponding to an integrated luminosity of 1.7 1/fb collected by the LHCb experiment at a center-of-mass energy of 13 TeV. Its branching fraction is measured to be B(Lambda_b -> Lambda gamma) = (7.1 +- 1.5 +- 0.6 +- 0.7) 10^{-6}, where the quoted uncertainties are statistical, systematic and systematic from external inputs, respectively. \u0000 \u0000A time-dependent analysis of the Bs -> phi gamma decay rate is performed to determine the CP-violating observables S and C, and the mixing-induced observable Adelta. The measurement is based on a sample of pp collision data recorded with the LHCb detector, corresponding to an integrated luminosity of 3 1/fb at center-of-mass energies of 7 and 8 TeV. The measured values are S= 0.43 +- 0.30 +- 0.11, C= 0.11 +- 0.29 +- 0.11, Adelta = -0.67 +0.37 -0.41 +- 0.17, where the first uncertainty is statistical and the second systematic. The results are consistent with the Standard Model predictions.","PeriodicalId":125063,"journal":{"name":"Proceedings of 18th International Conference on B-Physics at Frontier Machines — PoS(Beauty2019)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124580391","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
Lattice QCD (focus on Charm and Beauty form factors, R(D*), b- & c-quark masses) 晶格QCD(专注于魅力和美丽的形状因子，R(D*)， b-和c-夸克质量)
Proceedings of 18th International Conference on B-Physics at Frontier Machines — PoS(Beauty2019) Pub Date : 2020-02-03 DOI: 10.22323/1.377.0037
O. Witzel
{"title":"Lattice QCD (focus on Charm and Beauty form factors, R(D*), b- & c-quark masses)","authors":"O. Witzel","doi":"10.22323/1.377.0037","DOIUrl":"https://doi.org/10.22323/1.377.0037","url":null,"abstract":"We present an overview of state of the art lattice quantum chromodynamcis calculations for heavy-light quantities. Special focus is given to the calculation of form factors for semi-leptonic decays of $B_{(s)}$ and $D$ mesons, the extraction of the Cabibbo-Kobayashi-Maskawa matrix elements $|V_{ub}|$ and $|V_{cb}|$ as well as the determination of $R(D^{(*)})$ testing the universality of lepton flavors in $bto c$ transitions. In addition we report on the determination of $b$ and $c$ quark masses as well as on neutral $B_{(s)}$ meson mixing. Recent results are summarized and new developments highlighted.","PeriodicalId":125063,"journal":{"name":"Proceedings of 18th International Conference on B-Physics at Frontier Machines — PoS(Beauty2019)","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116757892","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: 5
Beauty 2019 — Conference summary 美妆2019 -会议总结
Proceedings of 18th International Conference on B-Physics at Frontier Machines — PoS(Beauty2019) Pub Date : 2020-01-31 DOI: 10.22323/1.377.0058
P. Koppenburg
{"title":"Beauty 2019 — Conference summary","authors":"P. Koppenburg","doi":"10.22323/1.377.0058","DOIUrl":"https://doi.org/10.22323/1.377.0058","url":null,"abstract":"Some highlights from the 18$^{rm th}$ international conference on $B$ physics at frontier machines are presented, including first results from the full LHC Run 2 data and from early Belle II data.","PeriodicalId":125063,"journal":{"name":"Proceedings of 18th International Conference on B-Physics at Frontier Machines — PoS(Beauty2019)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125531606","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
Measurements of the CKM angle γ at LHCb LHCb的CKM角γ的测量
Proceedings of 18th International Conference on B-Physics at Frontier Machines — PoS(Beauty2019) Pub Date : 2020-01-31 DOI: 10.22323/1.377.0007
M. Bjoern
{"title":"Measurements of the CKM angle γ at LHCb","authors":"M. Bjoern","doi":"10.22323/1.377.0007","DOIUrl":"https://doi.org/10.22323/1.377.0007","url":null,"abstract":"These proceedings describe two LHCb measurements of the CKM angle $gamma$: a measurement with $B^0to D K^{*0}$ decays where the $D$ meson decays into two- and four-body final states, using proton-proton collision data corresponding to an integrated luminosity of $5,text{fb}^{-1}$, and a measurement using $B^pmto DK^pm$ decays where the $D$ decays into the final states $K_text{S}^0pi^+pi^-$ and $K_text{S}^0K^+K^-$, using data corresponding to an integrated luminosity of $2,text{fb}^{-1}$. Furthermore, the combination of all LHCb measurements of $gamma$ is described. This combination constitutes the world-leading, single-experiment direct determination of $gamma$ and obtains the value $gamma=(74.0^{+5.0}_{-5.8})^circ$.","PeriodicalId":125063,"journal":{"name":"Proceedings of 18th International Conference on B-Physics at Frontier Machines — PoS(Beauty2019)","volume":"158 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133929297","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
Rare kaon decays and CP violation 罕见的介子衰变和CP破坏
Proceedings of 18th International Conference on B-Physics at Frontier Machines — PoS(Beauty2019) Pub Date : 2020-01-29 DOI: 10.22323/1.377.0027
A. Pich
{"title":"Rare kaon decays and CP violation","authors":"A. Pich","doi":"10.22323/1.377.0027","DOIUrl":"https://doi.org/10.22323/1.377.0027","url":null,"abstract":"Owing to the strong suppression of flavour-changing neutral-current transitions in the Standard Model, rare kaon decays constitute a superb tool to constrain hypothetical new-physics interactions. At the same time, they provide many interesting tests of the Standard Model itself, being sensitive both to short-distance electroweak scales and to the long-distance QCD dynamics. A brief overview of the current status is presented. The Standard Model prediction for the direct CP-violating ratio $varepsilon'/varepsilon$ is also discussed.","PeriodicalId":125063,"journal":{"name":"Proceedings of 18th International Conference on B-Physics at Frontier Machines — PoS(Beauty2019)","volume":"95 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115347406","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
Lattice spectroscopy (focus on exotics) 晶格光谱学(重点研究外来物)
Proceedings of 18th International Conference on B-Physics at Frontier Machines — PoS(Beauty2019) Pub Date : 2020-01-06 DOI: 10.22323/1.377.0009
S. Prelovsek
{"title":"Lattice spectroscopy (focus on exotics)","authors":"S. Prelovsek","doi":"10.22323/1.377.0009","DOIUrl":"https://doi.org/10.22323/1.377.0009","url":null,"abstract":"Recent lattice QCD results on the hadron spectroscopy with beauty and charm quarks is reviewed. The focus of the review are exotic hadrons, while non-lattice approaches and conventional hadrons are reported as well. We discuss the recently discovered $Omega_c^*$, a charmonium state with spin three, $P_c$ pentaquarks, $B_c(2S)$ and $Lambda_b^*$, the long-standing challenges for theory $Z_c$, $Z_b$ and $X(3872)$, and we review predictions for yet undiscovered states $bbbar qbar q$, $bar bbbar bb$, highly excited and hybrid $bar bb$, baryons with bottom quarks and still-missing $B_{s}$ mesons.","PeriodicalId":125063,"journal":{"name":"Proceedings of 18th International Conference on B-Physics at Frontier Machines — PoS(Beauty2019)","volume":"144 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122681189","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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