A measurement of differential cross sections for the production of a pair of isolated photons in proton–proton collisions at is presented. The data sample corresponds to an integrated luminosity of 5.0 collected with the CMS detector. A data-driven isolation template method is used to extract the prompt diphoton yield. The measured cross section for two isolated photons, with transverse energy above 40 and 25 respectively, in the pseudorapidity range , and with an angular separation , is . Differential cross sections are measured as a function of the diphoton invariant mass, the diphoton transverse momentum, the azimuthal angle difference between the two photons, and the cosine of the polar angle in the Collins–Soper reference frame of the diphoton system. The results are compared to theoretical predictions at leading, next-to-leading, and next-to-next-to-leading order in quantum chromodynamics.
In this work, the hollow mesoporous CuO nanotubes are synthesized using a surfactant‐assisted soft template approach. It is believed that the surfactant used during the synthesis provides a skeleton for the rearrangement of nanoparticles, resulting in the formation of hollow nanotubes. Furthermore, the sample becomes mesoporous during the calcination at 500 °C due to the removal of the surfactant template. On the other hand, the porous nanostructure efficiently improves the reaction kinetics of the electrode material, which offers excellent electrochemical performance. The obtained hollow mesoporous CuO nanotube electrode manifests high Li‐ion storage such as ∼253 mAh g−1 at 1 C and 118 mAh g−1 at 3 C after 150 cycles. It is significant to highlight that the current synthesis process is straightforward, affordable, time‐efficient and environment friendly as compared to tedious physical approaches. In addition, the proposed strategy in this work also demonstrates a window for the development of new advanced nanomaterials for post‐lithium‐ion battery applications.
JSNS$$^2$$
2
(J-PARC Sterile Neutrino Search at J-PARC Spallation Neutron Source) is an experiment that is searching for sterile neutrinos via the observation of $${\bar{\nu }}_{\mu } \rightarrow {\bar{\nu }}_{e}$$
ν
¯
μ
→
ν
¯
e
appearance oscillations using muon decay-at-rest neutrinos. Before dedicated data taking in the first-half of 2021, we performed a commissioning run for 10 days in June 2020. Using the data obtained in this commissioning run, in this paper, we present an estimate of the correlated background which imitates the $${\bar{\nu }}_{e}$$
ν
¯
e
signal in a sterile neutrino search. In addition, in order to demonstrate future prospects of the JSNS$$^2$$
2
experiment, possible pulse shape discrimination improvements towards reducing cosmic ray induced fast neutron background are described.
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