arXiv subjects

Jin Li

Publications and source records attributed to Jin Li.

311 records · Page 18Linked to original sources

arXiv2011

Observation of $B_s^0\to J/ψf_0(980)$ and Evidence for $B_s^0\to J/ψf_0(1370)$

We report the first observation of $B_s^0\to J/ψf_0(980)$ and first evidence for $B_s^0\to J/ψf_0(1370)$, which are CP eigenstate decay modes. These results are obtained from $121.4\;\mathrm{fb}^{-1}$ of data collected at the $Υ(5S)$ resonance with the Belle detector at the KEKB $e^+e^-$ collider. We measure the branching fractions $\mathcal{B}(B_s^0\to J/ψf_0(980);f_0(980)\toπ^+π^-)=(1.16^{+0.31}_{-0.19}(\mathrm{stat.})^{+0.15}_{-0.17}(\mathrm{syst.})^{+0.26}_{-0.18}(N_{B_s^{(*)}\bar B_s^{(*)}})) \times 10^{-4}$ with a significance of $8.4σ$, and $\mathcal{B}(B_s^0\to J/ψf_0(1370);f_0(1370)\toπ^+π^-)=(0.34^{+0.11}_{-0.14}(\mathrm{stat.})^{+0.03}_{-0.02}(\mathrm{syst.})^{+0.08}_{-0.05}(N_{B_s^{(*)}\bar B_s^{(*)}})) \times 10^{-4}$ with a significance of $4.2σ$. The last error listed is due to uncertainty in the number of produced $B_s^{(*)}\bar B_s^{(*)}$ pairs.

hep-ex↗

arXiv2009

Inter-Operator Feedback in Data Stream Management Systems via Punctuation

High-volume, high-speed data streams may overwhelm the capabilities of stream processing systems; techniques such as data prioritization, avoidance of unnecessary processing and on-demand result production may be necessary to reduce processing requirements. However, the dynamic nature of data streams, in terms of both rate and content, makes the application of such techniques challenging. Such techniques have been addressed in the context of static and centralized query optimization; however, they have not been fully addressed for data stream management systems. In this work, we present a comprehensive framework that supports prioritization, avoidance of unnecessary work, and on-demand result production over distributed, unreliable, bursty, disordered data sources, typical of many data streams. We propose a form of inter-operator feedback, which flows against the stream direction, to communicate the information needed to enable execution of these techniques. This feedback leverages punctuations to describe the subsets of interest. We identify potential sources of feedback information, characterize new types of punctuation to support feedback, and describe the roles of producers, exploiters, and relayers of feedback that query operators may implement. We present initial experimental observations using the NiagaraST data-stream system.

cs.DB↗

arXiv2008

Radiative Penguin decays at Belle

We present recent progresses in radiative penguin decays of $B$ meson using a large sample of $B\bar{B}$ pairs recorded at the $Υ(4S)$ resonance with the Belle detector at the KEKB asymmetric energy $e^+e^-$ collider. We report precise measurement of inclusive $b\to sγ$ branching ratio with cut $E_γ> 1.7$ GeV, first measurement of time-dependent CP-violation in $B^0\to K_sρ^0γ$, measurement of $B^+\to K^+η'γ$ branching fraction, and improved branching fraction results for $B^0\to(ρ,ω)γ$ with new CP and isospin violation results in the mode.

hep-ex↗

arXiv2002

Research Program of the TEXONO Collaboration: Status and Highlights

This article reviews the research program and efforts for the TEXONO Collaboration among scientists from Taiwan and China. These include reactor-based neutrino physics at the Kuo-Sheng Power Plant in Taiwan as well as various R&D efforts related to the various experimental techniques in neutrino and astro-particle physics.

hep-ex↗

arXiv1998

A Pilot Experiment with Reactor Neutrinos in Taiwan

A Collaboration comprising Taiwan and mainland Chinese scientists has been built up since 1996 to pursue a experimental program in neutrino and astro-particle physics in Taiwan. A pilot experiment to be performed at the Nuclear Power Station II in Taiwan is now under intense preparation. It will make use of a 600 kg CsI(Tl) crystal calorimeter to study various neutrino interactions. The feasibility of performing a long baseline reactor neutrino experiment will also be investigated. The conceptual design and the physics to be addressed by the pilot experiment are presented.

hep-ex↗