Nuclear and Particle Physics Proceedings最新文献_第2页

π-π scattering lengths: Electric corrections in the linear sigma model π-π散射长度：线性西格玛模型中的电校正

Nuclear and Particle Physics Proceedings Pub Date : 2024-10-28 DOI: 10.1016/j.nuclphysbps.2024.10.005

M. Loewe , R. Cádiz , R. Zamora

引用次数: 0

Light scalar quarkonia from Laplace sum rule at NLO 从拉普拉斯求和规则看 NLO 时的轻标量夸克态

Nuclear and Particle Physics Proceedings Pub Date : 2024-10-18 DOI: 10.1016/j.nuclphysbps.2024.10.004

R.M. Albuquerque , S. Narison , D. Rabetiarivony

{"title":"Light scalar quarkonia from Laplace sum rule at NLO","authors":"R.M. Albuquerque , S. Narison , D. Rabetiarivony","doi":"10.1016/j.nuclphysbps.2024.10.004","DOIUrl":"10.1016/j.nuclphysbps.2024.10.004","url":null,"abstract":"<div><div>We review our results on light scalar quarkonia (<span><math><mover><mrow><mi>q</mi></mrow><mrow><mo>¯</mo></mrow></mover><mi>q</mi></math></span> and four-quark states) from (inverse) QCD Laplace sum rules (LSR) and their ratios <span><math><mi>R</mi></math></span> within stability criteria and including higher order perturbative (PT) corrections up to the (estimated) <span><math><mi>O</mi><mo>(</mo><msubsup><mrow><mi>α</mi></mrow><mrow><mi>s</mi></mrow><mrow><mn>5</mn></mrow></msubsup><mo>)</mo></math></span>. As the Operator Product Expansion (OPE) usually converges for <span><math><mi>D</mi><mo>⩽</mo><mn>6</mn><mo>−</mo><mn>8</mn></math></span>, we evaluated the QCD spectral functions at Lowest Order (LO) of PT QCD and up to the <span><math><mi>D</mi><mo>=</mo><mn>6</mn></math></span> dimension vaccum condensates. We request that the optimal results obey the constraint: Pole (Resonance) contribution to the spectral integral is larger than the QCD continuum one which excludes an on-shell mass around <span><math><mo>(</mo><mn>500</mn><mo>−</mo><mn>600</mn><mo>)</mo><mspace></mspace><mtext>MeV</mtext></math></span> obtained for values of the QCD continuum threshold <span><math><msub><mrow><mi>t</mi></mrow><mrow><mi>c</mi></mrow></msub><mo>⩽</mo><mo>(</mo><mn>1</mn><mo>∼</mo><mn>1.5</mn><mo>)</mo><mspace></mspace><msup><mrow><mtext>GeV</mtext></mrow><mrow><mn>2</mn></mrow></msup></math></span>. Our results for the different assignments of the scalar mesons are compiled in Tables 1 to 3.</div></div>","PeriodicalId":37968,"journal":{"name":"Nuclear and Particle Physics Proceedings","volume":"347 ","pages":"Pages 68-74"},"PeriodicalIF":0.0,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142554622","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

Exotics searches at ATLAS 在 ATLAS 进行外来物种搜索

Nuclear and Particle Physics Proceedings Pub Date : 2024-10-18 DOI: 10.1016/j.nuclphysbps.2024.10.003

Kristina Mihule, ATLAS Collaboration

引用次数: 0

Recent highlights from the BELLE and BELLE II experiments BELLE 和 BELLE II 实验的最新亮点

Nuclear and Particle Physics Proceedings Pub Date : 2024-10-18 DOI: 10.1016/j.nuclphysbps.2024.10.002

Yubo Han, BELLE and BELLE II Collaborations

{"title":"Recent highlights from the BELLE and BELLE II experiments","authors":"Yubo Han, BELLE and BELLE II Collaborations","doi":"10.1016/j.nuclphysbps.2024.10.002","DOIUrl":"10.1016/j.nuclphysbps.2024.10.002","url":null,"abstract":"<div><div>The BELLE experiment at the KEKB collider in Tsukuba operated as a B-factory until 2018, making significant contributions to flavor physics. Building on this legacy, the BELLE II experiment, an upgraded version, now operates at the SuperKEKB energy-asymmetric <span><math><msup><mrow><mi>e</mi></mrow><mrow><mo>+</mo></mrow></msup><msup><mrow><mi>e</mi></mrow><mrow><mo>−</mo></mrow></msup></math></span> collider. BELLE II has collected <span><math><mn>424</mn><mspace></mspace><msup><mrow><mtext>fb</mtext></mrow><mrow><mo>−</mo><mn>1</mn></mrow></msup></math></span> of data, including <span><math><mn>365</mn><mspace></mspace><msup><mrow><mtext>fb</mtext></mrow><mrow><mo>−</mo><mn>1</mn></mrow></msup></math></span> at the <span><math><mi>ϒ</mi><mo>(</mo><mn>4</mn><mi>S</mi><mo>)</mo></math></span> resonance. A wide range of physics topics can be studies with this data. In this proceeding, we review our latest results, which include tests of lepton flavor universality, Cabibbo-Kobayashi-Maskawa physics, searches for rare <em>B</em>-meson decays, and spectroscopy studies. We also discuss contributions to the <span><math><msub><mrow><mi>g</mi></mrow><mrow><mi>μ</mi></mrow></msub><mo>−</mo><mn>2</mn></math></span> prediction.</div></div>","PeriodicalId":37968,"journal":{"name":"Nuclear and Particle Physics Proceedings","volume":"347 ","pages":"Pages 52-61"},"PeriodicalIF":0.0,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142530912","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

Bjorken polarised sum rule with IR-finite QCD coupling 具有红外无限 QCD 耦合的 Bjorken 极化和则

Nuclear and Particle Physics Proceedings Pub Date : 2024-10-08 DOI: 10.1016/j.nuclphysbps.2024.09.003

César Ayala , Camilo Castro-Arriaza , Gorazd Cvetič

{"title":"Bjorken polarised sum rule with IR-finite QCD coupling","authors":"César Ayala , Camilo Castro-Arriaza , Gorazd Cvetič","doi":"10.1016/j.nuclphysbps.2024.09.003","DOIUrl":"10.1016/j.nuclphysbps.2024.09.003","url":null,"abstract":"<div><div>We evaluate the Bjorken polarised sum rule (BSR) <span><math><msubsup><mrow><mover><mrow><mi>Γ</mi></mrow><mo>‾</mo></mover></mrow><mrow><mn>1</mn></mrow><mrow><mi>p</mi><mo>−</mo><mi>n</mi></mrow></msubsup><mo>(</mo><msup><mrow><mi>Q</mi></mrow><mrow><mn>2</mn></mrow></msup><mo>)</mo></math></span> with truncated Operator Product Expansion (OPE) up to the dimension <span><math><mi>D</mi><mo>=</mo><mn>4</mn></math></span> terms; the leading-twist (<span><math><mi>D</mi><mo>=</mo><mn>0</mn></math></span>) contribution is evaluated with a renormalon motivated resummation, where we use the IR-finite running coupling free of Landau singularities. The free residue parameters at the <span><math><mi>D</mi><mo>=</mo><mn>2</mn></math></span> and <span><math><mi>D</mi><mo>=</mo><mn>4</mn></math></span> terms are then extracted by fits to the experimental BSR data. In comparison to the case when perturbative QCD coupling is used in this approach (cf. Refs. <span><span>[1]</span></span>, <span><span>[2]</span></span>), many advantages become manifest in the present case: (a) no regularisation in the resummation integral is needed; (b) the <span><math><msup><mrow><mi>Q</mi></mrow><mrow><mn>2</mn></mrow></msup></math></span>-interval in the fit can be significantly extended to lower <span><math><msup><mrow><mi>Q</mi></mrow><mrow><mn>2</mn></mrow></msup></math></span>-values; (c) the extracted residue parameter values are more stable, this being reflected in the significantly reduced experimental uncertainties of these values and the suppressed (almost negligible) central extracted value of the <span><math><mi>D</mi><mo>=</mo><mn>4</mn></math></span> residue parameter (<span><math><msub><mrow><mi>μ</mi></mrow><mrow><mn>6</mn></mrow></msub></math></span>).</div></div>","PeriodicalId":37968,"journal":{"name":"Nuclear and Particle Physics Proceedings","volume":"347 ","pages":"Pages 32-36"},"PeriodicalIF":0.0,"publicationDate":"2024-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142434016","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

Towards few-body QCD on a quantum computer 在量子计算机上实现少数体 QCD

Nuclear and Particle Physics Proceedings Pub Date : 2024-10-08 DOI: 10.1016/j.nuclphysbps.2024.10.001

J.J. Gálvez-Viruet

引用次数: 0

New BABAR studies for the data-driven predictions of the muon g − 2 针对μ介子 g - 2 数据驱动预测的新 BABAR 研究

Nuclear and Particle Physics Proceedings Pub Date : 2024-10-01 DOI: 10.1016/j.nuclphysbps.2024.09.001

Georges Vasseur

引用次数: 0

Towards heavy double-gluon hybrid mesons with exotic quantum numbers in QCD sum rules 在 QCD 和则中实现具有奇异量子数的重双胶子混合介子

Nuclear and Particle Physics Proceedings Pub Date : 2024-09-26 DOI: 10.1016/j.nuclphysbps.2024.09.004

Ding-Kun Lian , Qi-Nan Wang , Xu-Liang Chen , Peng-Fei Yang , Wei Chen , Hua-Xing Chen

{"title":"Towards heavy double-gluon hybrid mesons with exotic quantum numbers in QCD sum rules","authors":"Ding-Kun Lian , Qi-Nan Wang , Xu-Liang Chen , Peng-Fei Yang , Wei Chen , Hua-Xing Chen","doi":"10.1016/j.nuclphysbps.2024.09.004","DOIUrl":"10.1016/j.nuclphysbps.2024.09.004","url":null,"abstract":"<div><div>The double-gluon hybrid meson configuration was recently proposed and investigated within QCD sum rules. In this talk, we discuss the color structures of the double-gluon hybrid meson and construct current operators with exotic quantum numbers <span><math><msup><mrow><mi>J</mi></mrow><mrow><mi>P</mi><mi>C</mi></mrow></msup><mo>=</mo><msup><mrow><mn>1</mn></mrow><mrow><mo>−</mo><mo>+</mo></mrow></msup></math></span> and <span><math><msup><mrow><mn>2</mn></mrow><mrow><mo>+</mo><mo>−</mo></mrow></msup></math></span> for two of the structures. In the framework of QCD sum rules, we consider the condensates up to dimension-8 at the leading order of <span><math><msub><mrow><mi>α</mi></mrow><mrow><mi>s</mi></mrow></msub></math></span> for both charmonium and the bottomonium systems. The results indicate that the masses of the <span><math><msup><mrow><mn>1</mn></mrow><mrow><mo>−</mo><mo>+</mo></mrow></msup></math></span> and <span><math><msup><mrow><mn>2</mn></mrow><mrow><mo>+</mo><mo>−</mo></mrow></msup></math></span> charmonium double-gluon hybrid mesons are approximately <span><math><mn>6.1</mn><mo>−</mo><mn>7.2</mn></math></span> GeV and <span><math><mn>6.3</mn><mo>−</mo><mn>6.4</mn></math></span> GeV, respectively. As for the bottomonium systems, their masses fall within the range of <span><math><mn>13.7</mn><mo>−</mo><mn>14.3</mn></math></span> GeV and <span><math><mn>12.6</mn><mo>−</mo><mn>13.3</mn></math></span> GeV for the <span><math><msup><mrow><mn>1</mn></mrow><mrow><mo>−</mo><mo>+</mo></mrow></msup></math></span> and <span><math><msup><mrow><mn>2</mn></mrow><mrow><mo>+</mo><mo>−</mo></mrow></msup></math></span> channels, respectively. Additionally, the charmonium hybrids could be produced in the radiative decays of bottomonium mesons in BelleII experiment.</div></div>","PeriodicalId":37968,"journal":{"name":"Nuclear and Particle Physics Proceedings","volume":"347 ","pages":"Pages 19-26"},"PeriodicalIF":0.0,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142357347","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

Investigation on the Ω(2012) from QCD sum rules 从 QCD 和则探究 Ω(2012)

Nuclear and Particle Physics Proceedings Pub Date : 2024-09-26 DOI: 10.1016/j.nuclphysbps.2024.09.006

Niu Su , Hua-Xing Chen , Philipp Gubler , Atsushi Hosaka

引用次数: 0

Study of intrinsic-kT in the Parton Branching Method 研究偏子分支法中的本征 kT

Nuclear and Particle Physics Proceedings Pub Date : 2024-09-26 DOI: 10.1016/j.nuclphysbps.2024.09.005

Nataša Raičević

{"title":"Study of intrinsic-kT in the Parton Branching Method","authors":"Nataša Raičević","doi":"10.1016/j.nuclphysbps.2024.09.005","DOIUrl":"10.1016/j.nuclphysbps.2024.09.005","url":null,"abstract":"<div><div>The work presented here focuses on the production of Drell-Yan lepton pairs in hadron-hadron collisions with very low transverse momentum which is sensitive to the contribution from the non-perturbative transverse motion of partons inside hadrons as well as to the multiple soft gluon emissions which have to be resumed. To study the two contributions, we use Parton Branching Method which describes the evolution of transverse momentum dependent parton distributions and provides very precise predictions for inclusive observables such as the Drell–Yan cross section as a function of transverse momentum. In this study, we tune a parameter that describes the internal transverse motion of partons within hadron (intrinsic-<span><math><msub><mrow><mi>k</mi></mrow><mrow><mi>T</mi></mrow></msub></math></span>) depending on the soft gluon contribution which is varied applying a lower limit to the transverse momentum of the emitted parton in branching up to 2 GeV. It will be shown that the parameter presented by the width of the Gaussian distribution increases with the minimal transverse momentum. This means that by reducing the contribution of soft gluons, more intense internal transverse motion is required (larger intrinsic-<span><math><msub><mrow><mi>k</mi></mrow><mrow><mi>T</mi></mrow></msub></math></span>) to describe experimental data. Moreover, it was observed that the value of the intrinsic-<span><math><msub><mrow><mi>k</mi></mrow><mrow><mi>T</mi></mrow></msub></math></span> increases with the collision energy and such a trend is more pronounced when the minimum transverse momentum of the parton at the branching is higher.</div></div>","PeriodicalId":37968,"journal":{"name":"Nuclear and Particle Physics Proceedings","volume":"347 ","pages":"Pages 12-18"},"PeriodicalIF":0.0,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142357346","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