SuperKEKB collider

Akai, K.; Furukawa, K.; Koiso, H.

doi:10.1016/j.nima.2018.08.017

Cited by 219 publications

(136 citation statements)

References 45 publications

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“…The high single-bunch luminosity is achieved by implementation of Crab-Waist collision scheme with a large Pivinsky parameter and submillimeter β y (vertical beta-function) in interaction region. Today only two collider projects with large Pivinsky parameter are under operation: DAΦNE (LNF, Italy) [7] and SuperKEKb (KEK, Japan) [8]. In the first case this collision scheme helps to increase the luminosity approximately by 4 times, in the case of SuperKEKb project an increase of luminosity by 40 times is expected.…”

Section: Collider Conceptmentioning

confidence: 99%

The Super Charm-Tau Factory in Novosibirsk

Barniakov¹

2019

Proceedings of XXIX International Symposium on Lepton Photon Interactions at High Energies — PoS(LeptonPhoton2019)

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The Super Charm-Tau Factory is an electron-positron collider project in Novosibirsk with a peak luminosity of 10 35 cm −1 s −1 operating in the center of mass energy range between 2 and 6 GeV. Longitudinal polarization of the electrons at the interaction region is foreseen in the project. The physics program of the experiment is devoted to the measurements of charm quark and tau lepton. It includes precision tests of the standard model in the electro-weak sector, QCD measurements in the non-perturbative region, and searches for the beyond standard model phenomena. Conceptual designs of the collider based on crab-waist technique and universal detector are developed and presented. The preliminary physics program of the project is considered. Progresses of the physics simulation and systems prototyping are given.

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Section: Collider Conceptmentioning

confidence: 99%

The Super Charm-Tau Factory in Novosibirsk

Barniakov¹

2019

Proceedings of XXIX International Symposium on Lepton Photon Interactions at High Energies — PoS(LeptonPhoton2019)

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“…The Belle II experiment [1] is designed to search for new physics beyond the Standard Model[2] using high-statistics sample of B, charm, and τ which are generated by SuperKEKB [3] e + e − collider. The target luminosity of SuperKEKB is 8 × 10 35 cm −2 s −1 , and integrated luminosity goal is 50 ab −1 .…”

Section: Overviewmentioning

confidence: 99%

Commissioning of Belle II data acquisition

Park¹

2019

Proceedings of the 39th International Conference on High Energy Physics — PoS(ICHEP2018)

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The Belle II experiment operates at the SuperKEKB e + e − energy-asymmetric collider on or near the ϒ(4S) resonance energy. The Belle II experiment has completed the "Phase 2" run, in which the Belle II operation without the vertex detector system has been tested. The main focus of the Phase 2 run is on the search for new physics related with dark sector, axion-like particles, etc. with an intermediate luminosity on the way to reach the challenging target. To accomplish these physics goals of Phase 2, a new trigger menu for the single photon and low multiplicity events is essential. With the luminosity design goal, it is crucial to cope with a high trigger rate for data acquisition (DAQ). In this presentation, we describe the DAQ system of Belle II, focusing on the successful commissioning in Phase 2 and the performance of the system.

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“…Thus F (x, s) and D e (x, s) are obtained as In the SuperKEKB [47,48], it will collide electrons at 7 GeV with positrons at 4 GeV. The invariant variable √ s = √ 112 GeV.…”

Section: The Isr Contribution At B-factoriesmentioning

confidence: 99%

“…The total integrated luminosity accumulated by the Belle detector have reached 1.04ab −1 [49] . The goal of the BelleII detector in SuperKEKB is to accumulate an integrated luminosity of 50ab −1 [47]. In Table II, with the parameter set by m c = 1.5 GeV and µ r = 2m c , the number of events are estimated roughly at different bins of reduced CM energy.…”

Section: The Isr Contribution At B-factoriesmentioning

confidence: 99%

Perturbative QCD for J/ψ inclusive production via initial state radiation in collisions *

Gong

Wang

2019

Chinese Phys. C

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Up to the next-leading order (NLO) of quantum chromodynamics (QCD), the process e + e − → J/ψ + X with the center-of-mass (CM) energy range from 3.7 to 10.6 GeV is calculated. At 10.6 GeV, the results is consistent with the experiment results at the Belle. However, the predictions are much smaller than the measurement at BESIII at low CM energy range from 3.7 to 4.6 GeV. This indicates that the convergence of QCD perturbative expansion becomes worse as the CM energy becomes lower and closer to the inclusive J/ψ production threshold. For a further study of the QCD mechanism on J/ψ production at e + e − collider with different CM energy, the initial state radiation effect of e + e − → J/ψ + gg and e + e − → J/ψ + cc are calculated at the QCD NLO. The results are plotted and the numbers of events for different CM energy bins are provided for the designed SuperKEKB. This provides a method to precisely test the validity of perturbative prediction on J/ψ production in future measurements.PACS numbers:

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SuperKEKB collider

Cited by 219 publications

References 45 publications

The Super Charm-Tau Factory in Novosibirsk

The Super Charm-Tau Factory in Novosibirsk

Commissioning of Belle II data acquisition

Perturbative QCD for J/ψ inclusive production via initial state radiation in collisions *

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