ZEU-CTA

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2017-04-28
11:24
DBCoverage [PUBDB-2017-02075] Report/Journal Article
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Measurement of the $e^{+} e^{-} \to Z \gamma \gamma$ cross-section and determination of quartic gauge boson couplings at LEP
[CERN-EP-2000-006; hep-ex/0002037] ddc:530
A first measurement of the cross section of the process e + e − →Z γγ is reported using a total integrated luminosity of 231 pb −1 collected with the L3 detector at centre-of-mass energies of 182.7 GeV and 188.7 GeV . By selecting hadronic events with two isolated photons the e + e − →Z γγ cross section is measured to be 0.49 +0.20 −0.17 ±0.04 pb at 182.7 GeV and 0.47±0.10±0.04 pb at 188.7 GeV [...]
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2017-04-28
11:22
DBCoverage [PUBDB-2017-02074] Report/Journal Article
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Measurement of the running of the fine structure constant
[CERN-EP-2000-005; hep-ex/0002035] ddc:530
Small-angle Bhabha scattering data recorded at the Z resonance and large-angle Bhabha scattering data recorded at s =189 GeV by the L3 detector at LEP are used to measure the running of the effective fine-structure constant for spacelike momentum transfers. The results are α −1 (−2.1 GeV 2 )−α −1 (−6.25 GeV 2 )=0.78±0.26 α −1 (−12.25 GeV 2 )−α −1 (−3434 GeV 2 )=3.80±1.29, in agreement with theoretical predictions..
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2017-04-28
11:19
[PUBDB-2017-02073] Journal Article
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An upper limit on the diffuse flux of high energy neutrinos obtained with the Baikal detector NT-96
ddc:540
We present the results of a search for high-energy neutrinos with the Baikal underwater Cherenkov detector NT-96. An upper limit on the diffuse flux of ν e + ν μ + ν μ ̄ of E 2 Φ ν (E)<1.4×10 −5 cm −2 s −1 sr −1 GeV within neutrino energy range 10 4 –10 7 GeV is obtained, assuming an E −2 behavior of the neutrino spectrum..
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2017-04-28
11:17
[PUBDB-2017-02072] Report/Journal Article
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Registration of atmospheric neutrinos with the BAIKAL neutrino telescope NT-96
[astro-ph/9903341; DESY-99-017] ddc:540
We present first neutrino induced events observed with a deep underwater neutrino telescope. Data from 70 days effective life time of the BAIKAL prototype telescope NT-96 have been analyzed with two different methods. [...]
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2017-04-28
11:13
[PUBDB-2017-02071] Report/Journal Article
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The AMANDA neutrino telescope: Principle of operation and first results
[astro-ph/9906203; DESY-99-073] ddc:540
AMANDA is a high-energy neutrino telescope presently under construction at the geographical South Pole. In the Antarctic summer 1995/96, an array of 80 optical modules (OMs) arranged on 4 strings (AMANDA-B4) was deployed at depths between 1.5 and 2 km. [...]
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2017-03-03
11:10
[PUBDB-2017-01279] Journal Article
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Improved $\gamma$/hadron separation for the detection of faint $\gamma$-ray sources using boosted decision trees
ddc:540
Imaging atmospheric Cherenkov telescopes record an enormous number of cosmic-ray background events. Suppressing these background events while retaining $\gamma$-rays is key to achieving good sensitivity to faint $\gamma$-ray sources. [...]
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2017-01-09
15:25
OpenAccess [PUBDB-2017-00337] Dissertation / PhD Thesis

Search for extremely short transientgamma-ray sources with the VERITAS observatory
In astronomy, many of the observed sources show a transient behavior. Examples aregamma-ray bursts (GRBs) and active galactic nuclei (AGN). [...]
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2017-01-09
14:27
OpenAccess [PUBDB-2017-00330] Journal Article/Contribution to a conference proceedings
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Upper limits on the VHE $\gamma$-ray flux fromthe ULIRG Arp 220 and other galaxies with VERITAS
34th International Cosmic Ray Conference, Meeting locationThe Hague, The Netherlands, 30 Jul 2015 - 6 Aug 20152015-07-302015-08-06
Proceedings of Science (ICRC2015), 745 (2016) [10.3204/PUBDB-2017-00330]  GO
ddc:530
The cores of ultra-luminous infrared galaxies (ULIRGs) are very dense environments, with a high rate of star formation and supernova explosions. They are thought to be sites of cosmic-ray acceleration, and are predicted to emit $\gamma$-rays in the GeV to TeV range. [...]
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2017-01-09
14:20
OpenAccess [PUBDB-2017-00329] Journal Article/Contribution to a conference proceedings
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A template method for measuring the iron spectrumin cosmic rays with Cherenkov telescopes
34th International Cosmic Ray Conference, ICRC2015, Meeting locationThe Hague, The Netherlands, 30 Jul 2015 - 6 Aug 20152015-07-302015-08-06
Proceedings of Science (ICRC2015), 264 (2016) [10.3204/PUBDB-2017-00329]  GO
ddc:530
The energy-dependent abundance of elements in cosmic rays plays an important role in under-standing their acceleration and propagation. Most current results are obtained either from di-rect measurements by balloon- or satellite-borne detectors, or from indirect measurements byair shower detector arrays on the Earth’s surface. [...]
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2017-01-09
12:54
arXiv [PUBDB-2017-00311] Report/Journal Article
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Astroclimatic Characterization of Vallecitos: A candidate site for the Cherenkov Telescope Array at San Pedro Mártir
[arXiv:1601.02383] ddc:520
We conducted an 18 month long study of the weather conditions of the Vallecitos, a proposed site in Mexico to harbor the northern array of the Cherenkov Telescope Array (CTA). It is located in Sierra de San Pedro Martir (SPM) a few kilometers away from Observatorio Astron\'omico Nacional. [...]
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