长白山的野猪

野猪（Sus scrofa Linnaeus）是我国传统狩猎兽类之一。经济利用价值高,所以,目前在我国东北,野猪与棕熊（Ursusarctos Linnaeus）、黑熊（Selenarctos thi-betanus G. Cuvier）和狍（Capreolus ca-preclus Linnaeus）已被列为四种最主要的狩猎对象。但是有关野猪的生态学资料至今研究报导较少。作者于1978—1979年,对长白山野猪的生态习性和数量、繁殖及食性等做了比较系统的观察,积累了一些有关野

长白山的狍

狍的中原亚种（Capreolusca Preolusbedfrdi）是我国分布较广、数量较多、经济价值较大的一种。已往国内仅就延安地区狍的生态有过报道（胡金元等,1982、1986）。鉴于其生态习性的地区差异,笔者于1978年10月—197

榛鸡在饲养条件下的繁殖和生长

有关榛鸡（Tetrastes bonasia amurensis）的生态生物学问题,国内外已有一些报道（1960;周福璋等,1964;赵正阶,1977）,但都是在自然环境中观察的结果,且因受自然条件的限制,在某些方面的研究还不够详细。我们从1982年开始对榛鸡进行饲养繁殖的研究,经人工孵化,至1983年初饲养保留下来6只（4雌2雄,春季均参加繁殖）,在饲养条件下对其繁殖习性和生长等情况进行了较为详细的观察,以补充野外观察之不足,并为榛鸡的饲养繁殖提供科学依据。一、饲养场地概况运动场（即笼子）系用木方做支架,四周、顶盖均用铁沙网围起,其大小为:

Prediction of Energy Resolution in the JUNO Experiment

International audienceThis paper presents the energy resolution study in the JUNO experiment, incorporating the latest knowledge acquired during the detector construction phase. The determination of neutrino mass ordering in JUNO requires an exceptional energy resolution better than 3% at 1 MeV. To achieve this ambitious goal, significant efforts have been undertaken in the design and production of the key components of the JUNO detector. Various factors affecting the detection of inverse beta decay signals have an impact on the energy resolution, extending beyond the statistical fluctuations of the detected number of photons, such as the properties of liquid scintillator, performance of photomultiplier tubes, and the energy reconstruction algorithm. To account for these effects, a full JUNO simulation and reconstruction approach is employed. This enables the modeling of all relevant effects and the evaluation of associated inputs to accurately estimate the energy resolution. The study reveals an energy resolution of 2.95% at 1 MeV. Furthermore, the study assesses the contribution of major effects to the overall energy resolution budget. This analysis serves as a reference for interpreting future measurements of energy resolution during JUNO data taking. Moreover, it provides a guideline in comprehending the energy resolution characteristics of liquid scintillator-based detectors

JUNO Sensitivity on Proton Decay p→νˉK+p\to \bar\nu K^+ Searches

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this paper, the potential on searching for proton decay in $p\to \bar\nu K^+$ mode with JUNO is investigated.The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits to suppress the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar\nu K^+$ is 36.9% with a background level of 0.2 events after 10 years of data taking. The estimated sensitivity based on 200 kton-years exposure is $9.6 \times 10^{33}$ years, competitive with the current best limits on the proton lifetime in this channel

JUNO sensitivity on proton decay p → ν K + searches*

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this study, the potential of searching for proton decay in the $p\to \bar{\nu} K^+$ mode with JUNO is investigated. The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits suppression of the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar{\nu} K^+$ is 36.9% ± 4.9% with a background level of $0.2\pm 0.05({\rm syst})\pm$$0.2({\rm stat})$ events after 10 years of data collection. The estimated sensitivity based on 200 kton-years of exposure is $9.6 \times 10^{33}$ years, which is competitive with the current best limits on the proton lifetime in this channel and complements the use of different detection technologies

Determination of the number of ψ(3686) events taken at BESIII

The number of ψ(3686) events collected by the BESIII detector during the 2021 run period is determined to be (2259.3±11.1)×106 by counting inclusive ψ(3686) hadronic events. The uncertainty is systematic and the statistical uncertainty is negligible. Meanwhile, the numbers of ψ(3686) events collected during the 2009 and 2012 run periods are updated to be (107.7±0.6)×106 and (345.4±2.6)×106, respectively. Both numbers are consistent with the previous measurements within one standard deviation. The total number of ψ(3686) events in the three data samples is (2712.4±14.3)×10^