The deep underground neutrino experiment (DUNE), a 40-kton underground liquid argon time projection chamber experiment, will be sensitive to the electron-neutrino flavor component of the burst of neutrinos expected from the next Galactic core-collapse supernova. Such an observation will bring unique insight into the astrophysics of core collapse as well as into the properties of neutrinos. The general capabilities of DUNE for neutrino detection in the relevant few- to few-tens-of-MeV neutrino energy range will be described. As an example, DUNE’s ability to constrain the $$\nu _e$$ ν e spectral parameters of the neutrino burst will be considered.

of pp collisions at √ s NN = 5.02 TeV collected in 2015 with the ATLAS detector at the LHC. These measurements provide insight into the jet quenching process in the quark-gluon plasma created in the aftermath of ultrarelativistic collisions between two nuclei. The modifications to the jet fragmentation functions are quantified by dividing the measurements in Pb+Pb collisions by baseline measurements in pp collisions. This ratio is studied as a function of the transverse momentum of the jet, the jet rapidity, and the centrality of the collision. In both collision systems, the jet fragmentation functions are measured for jets with transverse momentum between 126 and 398 GeV and with an absolute value of jet rapidity less than 2.1. An enhancement of particles carrying a small fraction of the jet momentum is observed, which increases with centrality and with increasing jet transverse momentum. Yields of particles carrying a very large fraction of the jet momentum are also observed to be enhanced. Between these two enhancements of the fragmentation functions a suppression of particles carrying an intermediate fraction of the jet momentum is observed in Pb+Pb collisions. A small dependence of the modifications on jet rapidity is observed.

With an integrated luminosity of 2.47 fb −1 recorded by the ATLAS experiment at the LHC, the exclusive decays B 0 s → J=ψϕ and B 0 d → J=ψK Ã0 of B mesons produced in pp collisions at ffiffi ffi s p ¼ 7 TeV are used to determine the ratio of fragmentation fractions f s =f d. From the observed B 0 s → J=ψϕ and B 0 d → J=ψK Ã0 yields, the quantity ðf s =f d Þ½BðB 0 s → J=ψϕÞ=BðB 0 d → J=ψK Ã0 Þ is measured to be 0.199 AE 0.004ðstatÞAE 0.008ðsystÞ. Using a recent theory prediction for ½BðB 0 s → J=ψϕÞ=BðB 0 d → J=ψK Ã0 Þ yields ðf s =f d Þ ¼ 0.240 AE 0.004ðstatÞ AE 0.010ðsystÞ AE 0.017ðthÞ. This result is based on a new approach that provides a significant improvement of the world average.

In previous study, a pounding tuned mass damper (PTMD) was proposed to reduce the undesired vibration of a subsea jumper. Both experimental and numerical results verified the effectiveness of the PTMD. This paper aims to enhance the understanding of the PTMD through a parametric study. The jumper is subjected to sinusoidal forces of different frequencies. The reduction ratio is defined for evaluation of the mitigation performance. Three parameters are considered in this study: the pounding stiffness, the gap between the delimiter and the mass block, and the mass ratio. The parametric studies show that the PTMD system is not so sensitive to the small variations of the pounding stiffness and the gap. The reduction ratio is significantly increased with the mass ratio increased up to 2%. Afterwards, it is not so economic or practically feasible to enlarge the mass ratio.

The ATLAS Collaboration Charged-particle fragmentation functions for jets azimuthally balanced by a high-transversemomentum, prompt, isolated photon are measured in 25 pb −1 of pp and 0.49 nb −1 of Pb+Pb collision data at 5.02 TeV per nucleon pair recorded with the ATLAS detector at the Large Hadron Collider. The measurements are compared to predictions of Monte Carlo generators and to measurements of inclusively selected jets. In pp collisions, a different jet fragmentation function in photon-tagged events from that in inclusive jet events arises from the difference in fragmentation between light quarks and gluons. The ratios of the fragmentation functions in Pb+Pb events to that in pp events are used to explore the parton color-charge dependence of jet quenching in the hot medium. In relatively peripheral collisions, fragmentation functions exhibit a similar modification pattern for photon-tagged and inclusive jets. However, photontagged jets are observed to have larger modifications than inclusive jets in central Pb+Pb events.Ultrarelativistic nucleus-nucleus collisions create a quark-gluon plasma, a hot, dense, and long-lived system of deconfined quarks and gluons. The high density of unscreened color charges causes hard-scattered partons with large transverse momentum (p T ) to lose energy as they traverse the medium, a phenomenon referred to as jet quenching. In lead-lead (Pb+Pb) collisions at the Large Hadron Collider (LHC), jet production rates at fixed p T are suppressed relative to proton-proton (pp) collisions [1][2][3][4]. Since the parton shower develops inside the quark-gluon plasma, the momentum distributions of hadrons in the quenched jet are also modified. Measurements of the jet fragmentation function (FF) for inclusively produced jets in Pb+Pb collisions [5-7] exhibit differences from pp collisions. In these measurements, jets are selected by their final-state p T , i.e. after the effects of quenching, which may result in a bias towards jets that have suffered only modest modifications and complicates interpretation of the data [8, 9]. Alternatively, the initial parton p T can be tagged with a particle unaffected by the medium, such as a photon (γ) [10][11][12].The photon approximately balances the parton p T before quenching and thus selects populations of jets in pp and Pb+Pb collisions with identical initial conditions. A jet recoiling against a prompt photon is more likely to be initiated by the showering of a light quark, whereas inclusive jets are mostly initiated by gluons. Thus γ-tagged jets can provide information about how energy loss depends on the color charge of the initiating parton. Finally, the photon selection equally samples all geometric production points, whereas the inclusive selection may be biased towards jets which have lost less energy or were produced near the surface of the medium [13][14][15].Many theoretical models of jet quenching have highlighted the value of γ-tagged jet measurements [16][17][18], inviting systematic comparisons of these with inclusive jet measur...