Belle II Document Server 10 records found  Search took 0.15 seconds. 
1. Searches for Dark Sector Particles at Belle and Belle II / Savino Longo [BELLE2-CONF-PROC-2024-016] FPCP2024 Proceedings
21 July 2024

The Belle and Belle II experiment have collected samples of $e^+e^-$ collision data at centre-of-mass energies near the $\Upsilon(nS)$ resonances. [...]
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2. Recent dark-sector and tau physics results at Belle II / Savino Longo [BELLE2-TALK-DRAFT-2023-096] [BELLE2-TALK-CONF-2023-107]
17 July 2023
/ 31st International Symposium on Lepton Photon Interactions at High Energies
Belle has unique reach for a broad class of models that postulate the existence of dark matter particles with MeV—GeV masses. [...]
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3. Development of FastBDT Classifiers to Suppress Beam Background Clusters and Fake Photons / Priyanka Cheema ; Racha Cheaib ; Bruce Yabsley ; Chia-Ling Hsu ; et al [BELLE2-NOTE-PL-2023-003]
21 April 2023

We present an overview of the methodology used to develop FastBDT classifiers that suppress beam background clusters and fake photons, with the aim of using these classifiers to improve the signal-background separation power of the residual calorimeter energy E_ECL. [...]
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4. First application of CsI(Tl) pulse shape discrimination at an $e^+ e^-$ collider to improve particle identification at the Belle II experiment / Savino Longo ; John Michael Roney [BELLE2-PTHESIS-2021-018] Presented on 07 10 2019 PhD
University of Victoria / Victoria
This dissertation investigates CsI(Tl) pulse shape discrimination (PSD) as a novel experimental technique to improve challenging areas of particle identification at high energy $e^+ e^-$ colliders using CsI(Tl) calorimeters. [...]
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5. Dark sector searches at Belle II / Savino Longo [BELLE2-TALK-DRAFT-2021-079] [BELLE2-TALK-CONF-2021-058]
14 June 2021
/ PASCOS 2021
The Belle II experiment at the asymmetric $e^+e^-$ collider, SuperKEKB, is a substantial upgrade of the Belle/KEKB experiment. [...]
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6. Dark-matter and ALP search at Belle II / Savino Longo [BELLE2-TALK-DRAFT-2020-068] [BELLE2-TALK-CONF-2020-063]
24 September 2020
/ 19th International Conference on B-Physics at Frontier Machines, BEAUTY 2020
Invited talk for BEAUTY2020. [...]
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7. Pulse Shape Discrimination Results from Phase 2 / Savino Longo ; John Michael Roney [BELLE2-NOTE-PL-2019-007]
05 July 2019

These plots show CsI(Tl) pulse shape discrimination results from Phase 2 data and simulation. [...]
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8. Identifying Neutral Hadronic Showers with Pulse Shape Discrimination / S. Longo ; J. M. Roney [BELLE2-NOTE-PL-2018-027]
02 July 2018

We demonstrate the ability to select pure samples of neutral hadron clusters in Belle II Phase 2 data using pulse shape discrimination [...]
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9. Radiation Hardness of 30 cm Long CsI(Tl) Crystals / Savino Longo ; J. Michael Roney [2016 JINST 11 P08017] [arXiv:1608.07556] [BELLE2-PUB-TE-2016-001]
23 August 2016

Measurements of the degradation in performance of 30 cm long CsI(Tl) scintillation crystals exposed to 1 MeV photon doses of 2, 10, 35, 100 and 1000 Gy are presented. [...]
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10. Measurements of the Radiation Hardness of CsI(Tl) Scintillation Crystals and Comparison Studies with Pure CsI for the Belle II Electromagnetic Calorimeter / Savino Longo ; John Michael Roney [BELLE2-MTHESIS-2015-004]
University of Victoria / Victoria
In preparation for the large backgrounds expected to be present in the Belle II detector from the SuperKEKB e+e- collider, the radiation hardness of several large (5 x 5 x 30 cm3) thallium doped cesium iodide (CsI(Tl)) scintillation crystals are studied. [...]
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