Pub Date : 2024-10-01DOI: 10.1016/j.nuclphysbps.2024.09.001
Georges Vasseur
Using the full data sample, a dedicated measurement of additional radiation in and initial-state-radiation events is presented. Results are obtained at next-to-leading and next-to-next-to-leading order, with one and two additional photons, respectively, for radiation from the initial and final states. The comparison with predictions from Phokhara and AfkQed Monte Carlo generators reveals discrepancies for the former in the one-photon rates and angular distributions. While this disagreement has a negligible effect on the cross section measured by , the impact on other cross-section measurements may be larger than uncertainties assigned. The findings shed a new light on the long-standing deviation between the muon measurement and the Standard Model prediction using the data-driven dispersive approach.
{"title":"New BABAR studies for the data-driven predictions of the muon g − 2","authors":"Georges Vasseur","doi":"10.1016/j.nuclphysbps.2024.09.001","DOIUrl":"10.1016/j.nuclphysbps.2024.09.001","url":null,"abstract":"<div><div>Using the full <span><math><mi>B</mi><mi>A</mi><mi>B</mi><mi>A</mi><mi>R</mi></math></span> data sample, a dedicated measurement of additional radiation in <span><math><msup><mrow><mi>e</mi></mrow><mrow><mo>+</mo></mrow></msup><msup><mrow><mi>e</mi></mrow><mrow><mo>−</mo></mrow></msup><mo>→</mo><msup><mrow><mi>μ</mi></mrow><mrow><mo>+</mo></mrow></msup><msup><mrow><mi>μ</mi></mrow><mrow><mo>−</mo></mrow></msup><mi>γ</mi></math></span> and <span><math><msup><mrow><mi>e</mi></mrow><mrow><mo>+</mo></mrow></msup><msup><mrow><mi>e</mi></mrow><mrow><mo>−</mo></mrow></msup><mo>→</mo><msup><mrow><mi>π</mi></mrow><mrow><mo>+</mo></mrow></msup><msup><mrow><mi>π</mi></mrow><mrow><mo>−</mo></mrow></msup><mi>γ</mi></math></span> initial-state-radiation events is presented. Results are obtained at next-to-leading and next-to-next-to-leading order, with one and two additional photons, respectively, for radiation from the initial and final states. The comparison with predictions from Phokhara and AfkQed Monte Carlo generators reveals discrepancies for the former in the one-photon rates and angular distributions. While this disagreement has a negligible effect on the <span><math><msup><mrow><mi>e</mi></mrow><mrow><mo>+</mo></mrow></msup><msup><mrow><mi>e</mi></mrow><mrow><mo>−</mo></mrow></msup><mo>→</mo><msup><mrow><mi>π</mi></mrow><mrow><mo>+</mo></mrow></msup><msup><mrow><mi>π</mi></mrow><mrow><mo>−</mo></mrow></msup><mo>(</mo><mi>γ</mi><mo>)</mo></math></span> cross section measured by <span><math><mi>B</mi><mi>A</mi><mi>B</mi><mi>A</mi><mi>R</mi></math></span>, the impact on other cross-section measurements may be larger than uncertainties assigned. The findings shed a new light on the long-standing deviation between the muon <span><math><mi>g</mi><mo>−</mo><mn>2</mn></math></span> measurement and the Standard Model prediction using the data-driven dispersive approach.</div></div>","PeriodicalId":37968,"journal":{"name":"Nuclear and Particle Physics Proceedings","volume":"347 ","pages":"Pages 27-31"},"PeriodicalIF":0.0,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142426473","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-26DOI: 10.1016/j.nuclphysbps.2024.09.004
Ding-Kun Lian , Qi-Nan Wang , Xu-Liang Chen , Peng-Fei Yang , Wei Chen , Hua-Xing Chen
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 and 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 for both charmonium and the bottomonium systems. The results indicate that the masses of the and charmonium double-gluon hybrid mesons are approximately GeV and GeV, respectively. As for the bottomonium systems, their masses fall within the range of GeV and GeV for the and channels, respectively. Additionally, the charmonium hybrids could be produced in the radiative decays of bottomonium mesons in BelleII experiment.
{"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}
Pub Date : 2024-09-26DOI: 10.1016/j.nuclphysbps.2024.09.006
Niu Su , Hua-Xing Chen , Philipp Gubler , Atsushi Hosaka
We investigate the recently observed baryon using QCD sum rules. By constructing P-wave Ω baryon currents and performing spin projection and parity projection, we obtain the masses of the and states as and , in good agreement with experiment. This suggests that is likely to be a negative parity P-wave excited state, though its spin remains undetermined and requires further study of its decay properties.
{"title":"Investigation on the Ω(2012) from QCD sum rules","authors":"Niu Su , Hua-Xing Chen , Philipp Gubler , Atsushi Hosaka","doi":"10.1016/j.nuclphysbps.2024.09.006","DOIUrl":"10.1016/j.nuclphysbps.2024.09.006","url":null,"abstract":"<div><div>We investigate the recently observed <span><math><mi>Ω</mi><mo>(</mo><mn>2012</mn><mo>)</mo></math></span> baryon using QCD sum rules. By constructing <em>P</em>-wave Ω baryon currents and performing spin projection and parity projection, we obtain the masses of the <span><math><msup><mrow><mi>J</mi></mrow><mrow><mi>P</mi></mrow></msup><mo>=</mo><mn>1</mn><mo>/</mo><msup><mrow><mn>2</mn></mrow><mrow><mo>−</mo></mrow></msup></math></span> and <span><math><mn>3</mn><mo>/</mo><msup><mrow><mn>2</mn></mrow><mrow><mo>−</mo></mrow></msup></math></span> states as <span><math><msub><mrow><mi>M</mi></mrow><mrow><mn>1</mn><mo>/</mo><msup><mrow><mn>2</mn></mrow><mrow><mo>−</mo></mrow></msup></mrow></msub><mo>=</mo><msubsup><mrow><mn>2.07</mn></mrow><mrow><mo>−</mo><mn>0.07</mn></mrow><mrow><mo>+</mo><mn>0.07</mn></mrow></msubsup><mspace></mspace><mtext>GeV</mtext></math></span> and <span><math><msub><mrow><mi>M</mi></mrow><mrow><mn>3</mn><mo>/</mo><msup><mrow><mn>2</mn></mrow><mrow><mo>−</mo></mrow></msup></mrow></msub><mo>=</mo><msubsup><mrow><mn>2.05</mn></mrow><mrow><mo>−</mo><mn>0.10</mn></mrow><mrow><mo>+</mo><mn>0.09</mn></mrow></msubsup><mspace></mspace><mtext>GeV</mtext></math></span>, in good agreement with experiment. This suggests that <span><math><mi>Ω</mi><mo>(</mo><mn>2012</mn><mo>)</mo></math></span> is likely to be a negative parity <em>P</em>-wave excited state, though its spin remains undetermined and requires further study of its decay properties.</div></div>","PeriodicalId":37968,"journal":{"name":"Nuclear and Particle Physics Proceedings","volume":"347 ","pages":"Pages 2-5"},"PeriodicalIF":0.0,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142326482","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}
Pub Date : 2024-09-26DOI: 10.1016/j.nuclphysbps.2024.09.005
Nataša Raičević
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-) 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-) to describe experimental data. Moreover, it was observed that the value of the intrinsic- 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.
{"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}
Pub Date : 2024-09-26DOI: 10.1016/j.nuclphysbps.2024.09.002
Siyuan Li , T.G. Steele , J. Ho , R. Raza , K. Williams , R.T. Kleiv
This study establishes bounds on the leading-order (LO) hadronic vacuum polarization (HVP) contribution to the anomalous magnetic moment of the muon (, ) by using Hölder's inequality and related inequalities in Finite-Energy QCD sum rules. Considering contributions from light quarks () up to five-loop order in perturbation theory within the chiral limit, leading-order light-quark mass corrections, next-to-leading order for dimension-four QCD condensates, and leading-order for dimension-six QCD condensates, the study finds QCD lower and upper bounds as .
{"title":"Bounds on aμHVP,LO using Hölder's inequalities and finite-energy QCD sum rules","authors":"Siyuan Li , T.G. Steele , J. Ho , R. Raza , K. Williams , R.T. Kleiv","doi":"10.1016/j.nuclphysbps.2024.09.002","DOIUrl":"10.1016/j.nuclphysbps.2024.09.002","url":null,"abstract":"<div><div>This study establishes bounds on the leading-order (LO) hadronic vacuum polarization (HVP) contribution to the anomalous magnetic moment of the muon (<span><math><msubsup><mrow><mi>a</mi></mrow><mrow><mi>μ</mi></mrow><mrow><mi>HVP</mi><mo>,</mo><mi>LO</mi></mrow></msubsup></math></span>, <span><math><msub><mrow><mi>a</mi></mrow><mrow><mi>μ</mi></mrow></msub><mo>=</mo><msub><mrow><mo>(</mo><mi>g</mi><mo>−</mo><mn>2</mn><mo>)</mo></mrow><mrow><mi>μ</mi></mrow></msub><mo>/</mo><mn>2</mn></math></span>) by using Hölder's inequality and related inequalities in Finite-Energy QCD sum rules. Considering contributions from light quarks (<span><math><mi>u</mi><mo>,</mo><mi>d</mi><mo>,</mo><mi>s</mi></math></span>) up to five-loop order in perturbation theory within the chiral limit, leading-order light-quark mass corrections, next-to-leading order for dimension-four QCD condensates, and leading-order for dimension-six QCD condensates, the study finds QCD lower and upper bounds as <span><math><mrow><mo>(</mo><mn>657.0</mn><mo>±</mo><mn>34.8</mn><mo>)</mo></mrow><mo>×</mo><msup><mrow><mn>10</mn></mrow><mrow><mo>−</mo><mn>10</mn></mrow></msup><mo>≤</mo><msubsup><mrow><mi>a</mi></mrow><mrow><mi>μ</mi></mrow><mrow><mi>HVP</mi><mo>,</mo><mi>LO</mi></mrow></msubsup><mo>≤</mo><mrow><mo>(</mo><mn>788.4</mn><mo>±</mo><mn>41.8</mn><mo>)</mo></mrow><mo>×</mo><msup><mrow><mn>10</mn></mrow><mrow><mo>−</mo><mn>10</mn></mrow></msup></math></span>.</div></div>","PeriodicalId":37968,"journal":{"name":"Nuclear and Particle Physics Proceedings","volume":"347 ","pages":"Pages 6-11"},"PeriodicalIF":0.0,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142357345","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-16DOI: 10.1016/j.nuclphysbps.2024.08.008
Mingjie Zhai
{"title":"HGTD DC/DC converter in low temperature and magnetic field operation","authors":"Mingjie Zhai","doi":"10.1016/j.nuclphysbps.2024.08.008","DOIUrl":"10.1016/j.nuclphysbps.2024.08.008","url":null,"abstract":"","PeriodicalId":37968,"journal":{"name":"Nuclear and Particle Physics Proceedings","volume":"347 ","pages":"Page 1"},"PeriodicalIF":0.0,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142240661","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}
Pub Date : 2024-09-06DOI: 10.1016/j.nuclphysbps.2024.08.009
Jiang Zhu, Jun Guo, Zhaofeng Kang
{"title":"Build a unified framework for SU(N) confinement phase transition and thermodynamics with quasigluon","authors":"Jiang Zhu, Jun Guo, Zhaofeng Kang","doi":"10.1016/j.nuclphysbps.2024.08.009","DOIUrl":"10.1016/j.nuclphysbps.2024.08.009","url":null,"abstract":"","PeriodicalId":37968,"journal":{"name":"Nuclear and Particle Physics Proceedings","volume":"346 ","pages":"Page 56"},"PeriodicalIF":0.0,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142148125","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}
Pub Date : 2024-09-06DOI: 10.1016/j.nuclphysbps.2024.08.003
Yuanzhe Wang
{"title":"Measurement of hypertriton production in ALICE","authors":"Yuanzhe Wang","doi":"10.1016/j.nuclphysbps.2024.08.003","DOIUrl":"10.1016/j.nuclphysbps.2024.08.003","url":null,"abstract":"","PeriodicalId":37968,"journal":{"name":"Nuclear and Particle Physics Proceedings","volume":"346 ","pages":"Page 55"},"PeriodicalIF":0.0,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142148124","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}
Pub Date : 2024-09-06DOI: 10.1016/j.nuclphysbps.2024.08.004
K. Ma, USTC HGTD group
{"title":"Status of USTC-IME pre-production sensor for the ATLAS high granularity timing detector","authors":"K. Ma, USTC HGTD group","doi":"10.1016/j.nuclphysbps.2024.08.004","DOIUrl":"10.1016/j.nuclphysbps.2024.08.004","url":null,"abstract":"","PeriodicalId":37968,"journal":{"name":"Nuclear and Particle Physics Proceedings","volume":"346 ","pages":"Page 53"},"PeriodicalIF":0.0,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142148122","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}
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