Context. The first generation of stars formed in the Galaxy left behind the chemical signatures of their nucleosynthesis in the interstellar medium, visible today in the atmospheres of low-mass stars that formed afterwards. Sampling the chemistry of those low-mass provides insight into the first stars. Aims: We aim to increase the samples of stars

Hexagonal boron nitride (h-BN) was neutron damaged at an integral flux of 2.40 × 1012 n cm−2 s−1 for 1, 2, 3 and 4 h. The h-BN samples undergo a transition from sp2 to sp3 hybridization as a consequence of the neutron induced damage with the formation of cubic boron nitride (c-BN) spots, as suggested both by FT–IR and Raman spectroscopy. In

Lithium bis(oxalato) borate (LiBOB) was neutron bombarded with a flux of 2.40 × 1012 n cm−2 s−1 for 1, 2, 3 and 4 h. The neutron damaged LiBOB was studied by FT-IR and Raman spectroscopy as well as by DSC (Differential Scanning Calorimetry). It is shown that the neutron bombardment causes the radiolysis of the oxalate ligand of LiBOB producing

Context. PKS 1510-089 is one of only a few flat spectrum radio quasars detected in the very-high-energy (VHE, > 100 GeV) gamma-ray band. Aims: We study the broadband spectral and temporal properties of the PKS 1510-089 emission during a high gamma-ray state. Methods: We performed VHE gamma-ray observations of PKS 1510-089 with the Major Atmospheric

The invariance of the standard model (SM) under the CPT transformation predicts equality of particle and antiparticle masses. This prediction is tested by measuring the mass difference between the top quark and antiquark (Δmt =mt -mt‾) that are produced in pp collisions at a center-of-mass energy of 8 TeV, using events with a muon or an electron

The first measurement of the jet mass m_{ {jet}} of top quark jets produced in {t}\overline{t} events from pp collisions at √{s}=8 {TeV} is reported for the jet with the largest transverse momentum pT in highly boosted hadronic top quark decays. The data sample, collected with the CMS detector, corresponds to an integrated luminosity of 19.7 {fb}^{