Novoasirsko carstvo pod Senaheribovom vladavinom ostavilo je neizbrisiv trag na širokom području Bliskog istoka. Ipak, zahvaljujući asirskim izvorima, a osobito starozavjetnoj predaji, granice ...njegova utjecaja znatno su rasprostranjenije, ima li se u vidu geografsku rasprostranjenost i utjecaj biblijskih poruka na kolektivnu svijest čovječanstva. U ovom će se radu, upravo zbog njegova iznimna utjecaja, pokušati usporediti pisane asirske i biblijske izvore koji prema shvaćanju tradicionalne historiografije opisuju isti događaj, ali ukazat će se i na njihovo moguće alternativno tumačenje. Da je riječ samo o istom povijesnom događaju utemeljenom na različitim izvorima iz različitih tradicija, tada to uistinu ne bi bilo ništa značajno. Ipak, tu je riječ i o drukčijim teologijskim pogledima na svijet u kojem asirski bogovi odnosno židovski Jahve, kao uostalom i ljudi, imaju svoje mjesto budući da oba izvora u sebi nose i vlastita uvjerenja o ispravnosti religije i boga Ašura odnosno Boga Jahvea koji su im zaštitnici i čiji su oni kao narodi nositelji.
The very forward region is one of the most challenging regions to instrument at a future \(e^+e^-\) collider. At CEPC, machine-detector interface includes, among others, a calorimeter dedicated for ...precision measurement of the integrated luminosity at a permille level or better. Here we review a feasibility of such precision, from the point of view of luminometer mechanical precision and positioning, beam-related requirements and physics background.A method of the effective center-of-mass determination from \(e^+e^- \to \mu^+\mu^-\), initially proposed for FCC, is also discussed for the CEPC beams.
The production of leading neutrons, where the neutron carries a large fraction
x
L
of the incoming proton’s longitudinal momentum, is studied in deep-inelastic positron-proton scattering at HERA. The ...data were taken with the H1 detector in the years 2006 and 2007 and correspond to an integrated luminosity of 122 pb
−1
. The semi-inclusive cross section is measured in the phase space defined by the photon virtuality 6<
Q
2
<100 GeV
2
, Bjorken scaling variable 1.5⋅10
−4
<
x
<3⋅10
−2
, longitudinal momentum fraction 0.32<
x
L
<0.95 and neutron transverse momentum
p
T
<0.2 GeV. The leading neutron structure function,
, and the fraction of deep-inelastic scattering events containing a leading neutron are studied as a function of
Q
2
,
x
and
x
L
. Assuming that the pion exchange mechanism dominates leading neutron production, the data provide constraints on the shape of the pion structure function.
A measurement of the inclusive deep inelastic neutral current
e
+
p
scattering cross section is reported in the region of four-momentum transfer squared, 12 GeV
2
≤
Q
2
≤150 GeV
2
, and Bjorken
x
, ...2×10
−4
≤
x
≤0.1. The results are based on data collected by the H1 Collaboration at the
ep
collider HERA at positron and proton beam energies of
E
e
=27.6 GeV and
E
p
=920 GeV, respectively. The data are combined with previously published data, taken at
E
p
=820 GeV. The accuracy of the combined measurement is typically in the range of 1.3–2%. A QCD analysis at next-to-leading order is performed to determine the parton distributions in the proton based on H1 data.
In this paper we address the potential of a 3 TeV center-of-mass energy Compact Linear Collider (CLIC) to measure the Standard Model (SM) Higgs boson decay to two photons. Since photons are massless, ...they are not coupled to the Higgs boson at the tree level, but they are created in a loop exchange of heavy particles either from the Standard Model or beyond. Any deviation of the effective \(H\rightarrow\gamma\gamma\) branching ratio and consequently of the Higgs to photon coupling may indicate New Physics. The Higgs decay to two photons is thus an interesting probe of the Higgs sector, both at the running and future experiments. A similar study has been performed by C. Grefe at 1.4 TeV CLIC, where the statistical uncertainty is determined to be 15\% for an integrated luminosity of 1.5 \(ab^{-1}\) with unpolarized beams. \noindent This study is performed using a full simulation of the detector for CLIC and by considering all relevant physics and beam-induced processes in a full reconstruction chain. The measurement is simulated on 5000 samples of pseudo-experiments and the relative statistical uncertainty is extracted from the pull distribution. It is shown that the Higgs production cross-section in \(W^+W^-\) fusion times the branching ratio BR(\(H\rightarrow\gamma\gamma\)) can be measured with a relative statistical accuracy of 8.2\%, assuming an integrated luminosity of 5 \(ab^{-1}\) with unpolarized beams.
Three methods for handling beam-beam effects in luminosity measurement at ILC are tested and evaluated in this work. The first method represents an optimization of the LEP-type asymmetric selection ...cuts that reduce the counting biases. The second method uses the experimentally reconstructed shape of the \(\sqrt{s'}\) spectrum to determine the Beamstrahlung component of the bias. The last, recently proposed, collision-frame method relies on the reconstruction of the collision-frame velocity to define the selection function in the collision frame both in experiment and in theory. Thus the luminosity expression is insensitive to the difference between the CM frame of the collision and the lab frame. The collision-frame method is independent of the knowledge of the beam parameters, and it allows an accurate reconstruction of the luminosity spectrum above 80 % of the nominal CM energy. However, it gives no precise infromation about luminosity below 80 % of the nominal CM energy. The compatibility of diverse selection cuts for background reduction with the collision-frame method is addressed.
PDF