Belle

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2019-09-13
15:39
arXiv [PUBDB-2019-03327] Preprint/Report
et al
Azimuthal asymmetries of back-to-back $\pi^\pm-(\pi^0,\eta,\pi^\pm)$ pairs in $e^+e^-$ annihilation
[arXiv:1909.01857; Belle Preprint # 2019-15; KEK Preprint #: 2019-21]
This work reports the first observation of azimuthal asymmetries around the thrust axis in $e^+e^-$ annihilation of pairs of back-to-back charged pions in one hemisphere, and $\pi^0$ and $\eta$ mesons in the opposite hemisphere. These results are complemented by a new analysis of pairs of back-to-back charged pions. [...]
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2019-09-13
15:30
arXiv [PUBDB-2019-03326] Preprint/Report
et al
First measurement of the CKM angle $\phi_3$ with $B^{\pm}\to D(K_{\rm S}^0\pi^+\pi^-\pi^0)K^{\pm}$ decays
[arXiv:1908.09499; Belle Preprint 2019-14; KEK Preprint 2019-19]
We present the first model-independent measurement of the CKM unitarity triangle angle $\phi_3$ using $B^{\pm}\to D(K_{\rm S}^0\pi^+\pi^-\pi^0)K^{\pm}$ decays, where $D$ indicates either a $D^{0}$ or $\overline{D}^{0}$ meson. Measurements of the strong-phase difference of the $D \to K_{\rm S}^0\pi^+\pi^-\pi^0$ amplitude obtained from CLEO-c data are used as input. [...]
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2019-09-13
15:22
arXiv [PUBDB-2019-03325] Preprint/Report
et al
Observation of $ \tau^- \rightarrow \pi^- \nu_{\tau} e^+ e^- $ and search for $\tau^- \rightarrow \pi^- \nu_{\tau} \mu^+ \mu^-$
[arXiv:1908.09353; Belle Preprint # 2019-12; and KEK Preprint #: 2019-15]
Observation of $ \tau^- \rightarrow \pi^- \nu_{\tau} e^+ e^- $ and search for $\tau^- \rightarrow \pi^- \nu_{\tau} \mu^+ \mu^-$We present the first measurements of branching fractions of rare tau-lepton decays, τ−→π−ντℓ+ℓ− (ℓ=e or μ), using a data sample corresponding to 562 fb−1 collected at a center-of-mass energy of 10.58 GeV with the Belle detector at the KEKB asymmetric-energy e+e− collider. The τ−→π−ντe+e− decay is observed for the first time with 7.0σ significance. [...]
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2019-09-13
15:10
arXiv [PUBDB-2019-03324] Report/Contribution to a conference proceedings
et al
Observation of a new structure near 10.75 GeV in the energy dependence of the $e^+e^-\to\Upsilon(nS)\pi^+\pi^-$ ($n=1,2,3$) cross sections
[arXiv:1905.05521; BELLE-CONF-1903]
13th International Workshop on Heavy Quarkonium (QWG 2019), QWG 2019, TurinTurin, Italy, 13 May 2019 - 17 May 20192019-05-132019-05-17
Contributions / Info
31 pp. ()
We report a new measurement of the $e^+e^-\to\Upsilon(nS)\pi^+\pi^-$ ($n=1,2,3$) cross sections at energies from 10.52 to 11.02 GeV using data collected with the Belle detector at the KEKB asymmetric-energy $e^+e^-$ collider. We observe a new structure in the energy dependence of the cross sections; if described by a Breit-Wigner function its mass and width are found to be $M=(10752.7\pm5.9\,^{+0.7}_{-1.1})\,$MeV/$c^2$ and $\Gamma=(35.5^{+17.6}_{-11.3}\,^{+3.9}_{-3.3})\,$MeV, where the first error is statistical and the second is systematic. [...]
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2019-09-12
17:14
OpenAccess [PUBDB-2019-03306] Talk (non-conference) (Invited)

Accelerator Prospects for Sub-GeV DM
Workshop 'New Directions in the Search for Light Dark Matters Particles', FermilabUSA, Fermilab, Warrenville, IL, 4 Jun 2019 - 7 Jun 20192019-06-042019-06-07  GO
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2019-09-12
16:58
OpenAccess [PUBDB-2019-03305] Talk (non-conference) (Invited)
et al
Collider Searches for Light Dark Sectors
Quantum Universe Kickoff Meeting of the Cluster of Excellence “Quantum Universe”, DESY Campus BahrenfeldHamburg, DESY Campus Bahrenfeld, Germany, 19 Mar 2019 - 20 Mar 20192019-03-192019-03-20  GO
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2019-09-12
16:37
OpenAccess [PUBDB-2019-03304] Conference Presentation (Invited)

Electromagnetic calorimeter reconstruction in Belle II
19th International Workshop on Advanced Computing and Analysis Techniques in Physics Research, ACAT2019, Steinmatte Conference CentreSaas Fee, Steinmatte Conference Centre, Switzerland, 10 Mar 2019 - 15 Mar 20192019-03-102019-03-15  GO
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2019-09-12
16:15
OpenAccess [PUBDB-2019-03303] Conference Presentation (After Call)

Lepton flavour and lepton number violation prospects at Belle II
27th International Conference on Supersymmetry and Unification of Fundamental Interactions, SUSY 2019, College of Science and EngineeringCorpus Christi, Texas, College of Science and Engineering, USA, 20 May 2019 - 24 May 20192019-05-202019-05-24  GO
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2019-09-12
15:54
OpenAccess [PUBDB-2019-03301] Lecture (Invited)

Flavour Physics (Special Seminar)
Lecture at DESY (Hamburg, Germany), 23 Aug 2019 - 23 Aug 20192019-08-232019-08-23  GO
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2019-09-12
15:20
OpenAccess [PUBDB-2019-03299] Talk (non-conference) (Invited)

High-level analysis software for the Belle II experiment
HEP software foundation, CERNGenf, CERN, Switzerland, 13 Feb 2019 - 13 Feb 20192019-02-132019-02-13  GO
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