50,079 research outputs found
Extraction of Kaon Formfactors from K^- -> mu^- nu_mu gamma Decay at ISTRA+ Setup
The radiative decay K->mu nu gamma has been studied at ISTRA+ setup in a new
kinematical region. About 22K events of K^- -> mu^- nu_mu gamma have been
observed. The sign and value of Fv-Fa have been measured for the first time.
The result is Fv-Fa=0.21(4)(4).Comment: 11 pages, 21 figures, submitted to Phys. Lett.
Precision tests of the Standard Model with leptonic and semileptonic kaon decays
We present a global analysis of leptonic and semileptonic kaon decays data,
including all recent results by BNL-E865, KLOE, KTeV, ISTRA+, and NA48.
Experimental results are critically reviewed and combined, taking into account
theoretical (both analytical and numerical) constraints on the semileptonic
kaon form factors. This analysis leads to a very accurate determination of Vus
and allows us to perform several stringent tests of the Standard Model
An evaluation of |Vus| and precise tests of the Standard Model from world data on leptonic and semileptonic kaon decays
We present a global analysis of leptonic and semileptonic kaon decay data,
including all recent results published by the BNL-E865, KLOE, KTeV, ISTRA+ and
NA48 experiments. This analysis, in conjunction with precise lattice
calculations of the hadronic matrix elements now available, leads to a very
precise determination of |Vus| and allows us to perform several stringent tests
of the Standard Model.Comment: LaTeX, 25 pages, 12 figures, 16 tables. Submitted to EPJC. v2: Minor
changes for accepted version. No numerical results change
European Court of Human Rights : Orlovskaya Istra v. Russia
In Orlovskaya Iskra v. Russia the European Court of Human Rights (ECtHR) has further developed its case law regarding freedom of expression and press freedom during election periods. The case concerns the application of a specific provision in Russian electoral law restricting the freedom of media reporting at election time. The Court’s judgment deals with the applicant’s conviction for an administrative offence for publishing critical articles about a politician during the 2007 parliamentary election campaign in Russia
Search for light pseudoscalar sgoldstino in K- decays
A search for the light pseudoscalar sgoldstino production in the three body
K- decay K-->pipi0P has been performed with the ISTRA+ detector exposed to the
25 GeV negative secondary beam of the U70 proton synchrotron. No signal is
seen. An upper limit for the branching ratio Br(K->pipi0P), at 90% confidence
level, is found to be around 9*10**-6 in the effective mass m(P) range from 0
till 200 MeV, excluding the region near m(pi0) where it degrades to 3.5*10**-5.Comment: 10 pages, LATEX, 8 EPS figures, revised version, to be published in
Phys.Lett.
Ptice gnjezdarice Paluda, Istra
During the spring of 2020, bird surveys were conducted in the ornithological reserve Palud. There were 35 breeding species registered. The most numerous species were the Eurasian Blackcap Sylvia atricapilla, the Common Nightingale Luscinia megarhynchos, the Common Blackbird Turdus merula, and the Eastern Subalpine Warbler Sylvia cantillans. A vulnerable breeder of Croatia, the Black-winged Stilt Himantopus himantopus, and a scarce breeder, the Common Shelduck Tadorna tadorna, were also recorded as breeding species.Tijekom proljeća 2020. godine provedeno je istraživanje ornitofaune u ornitološkom rezervatu Palud. Zabilježeno je 35 gnijezdećih vrsta ptica. Najbrojnije vrste su crnokapa grmuša Sylvia atricapilla, slavuj Luscinia megarhynchos, kos Turdus merula i bjelobrka grmuša Sylvia cantillans. Osjetljiva gnjezdarica Hrvatske, vlastelica Himantopus himantopus i malobrojna gnjezdarica Hrvatske, utva Tadorna tadorna zabilježene su kao gnijezdeće vrste. Potvrđeno je i gniježđenje kopca Accipiter nisus, vijoglava Jynx torquilla i goluba grivnjaša Columba palumbus koji do sada nisu bili zabilježeni na ovom području
- …