The BaBar Silicon Vertex Tracker Bozzi, C.; Ramusino, A.Cotta; Dittongo, S. ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
04/2001, Letnik:
461, Številka:
1
Journal Article
Recenzirano
The BaBar Silicon Vertex Tracker (SVT) is a five layer device, made from double-sided silicon strip detectors and read out via a custom time-over-threshold circuit, the AToM chip. The SVT is an ...essential part of the physics program of BaBar, and is able to reconstruct B meson decay vertices with a precision sufficient to measure time-dependent CP violating asymmetries at the PEP-II asymmetric e
+e
− collider. This report will give an overview of the SVT, with particular focus on the performance of the SVT, which has been taking colliding beam data since May 1999.
In this paper we report on a measurement of the Cotton Mouton effect of water vapour. Measurement performed at room temperature (\(T=301\) K) with a wavelength of 1064 nm gave the value \(\Delta n_u ...= (6.67 \pm 0.45) \cdot 10^{-15}\) for the unit magnetic birefringence (1 T magnetic field and atmospheric pressure).
We have measured gluon splitting into bottom quarks,
g→b
b
̄
, in hadronic
Z
0 decays collected by SLD between 1996 and 1998. The analysis was performed by looking for secondary bottom production in ...4-jet events of any primary flavor. 4-jet events were identified, and in each event a topological vertex-mass technique was applied to the two jets closest in angle in order to identify them as
b or
b
̄
jets. The upgraded CCD-based vertex detector gives very high
B-tagging efficiency, especially for
B hadrons with the low energies typical of this process. We measured the rate of
g→b
b
̄
production per hadronic event,
g
b
b
̄
, to be (2.44±0.59(stat.)±0.34(syst.))×10
−3.
The BaBar silicon vertex tracker Bozzi, C.; Carassiti, V.; Ramusino, A.Cotta ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
10/1999, Letnik:
435, Številka:
1
Journal Article
Recenzirano
The Silicon Vertex Tracker (SVT) for the BaBar experiment at the PEP-II asymmetric B factory is a 5-layer device based on double-sided, AC-coupled silicon strip detectors. It is read out by a custom ...IC, the AToM chip, that can simultaneously acquire, digitize and transmit data. The main purpose of the SVT is to accurately measure the decay position of the B mesons that are produced, which is essential for extracting CP asymmetries. Here, we report on the SVT design as well as progress on its fabrication and assembly.
During 2014 the PVLAS experiment has started data taking with a new apparatus installed at the INFN Section of Ferrara, Italy. The main target of the experiment is the observation of magnetic ...birefringence of vacuum. According to QED, the ellipticity generated by the magnetic birefringence of vacuum in the experimental apparatus is expected to be \(\psi^{\rm(QED)} \approx 5\times10^{-11}\). No ellipticity signal is present so far with a noise floor \(\psi^{\rm(noise)} \approx 2.5\times10^{-9}\) after 210 hours of data taking. The resulting ellipticity limit provides the best model independent upper limit on the coupling of axions to \(\gamma\gamma\) for axion masses above \(10^{-3}\)eV.
Good results obtained in grafting trials of Cuore di Bue variety [Lycopersicon esculentum Mill.; tomato Baudino, M. (Consorzio di Ricerca, Sperimentazione e Divulgazione per l´Ortofrutticoltura Piemontese (CReSO), Cuneo (Italy)); Giordano, M. (Consorzio di Ricerca, Sperimentazione e Divulgazione per l´Ortofrutticoltura Piemontese (CReSO), Cuneo (Italy)); Bergia, G. (Federazione Provinciale Coltivatori Diretti, Cuneo (Italy))
L'Informatore agrario,
(18-24 Feb 2005), Letnik:
61, Številka:
7
Journal Article
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