Event calendar file
Free Meson Seminars
First detection of solar neutrinos from the CNO cycle with Borexino
by Prof. Gioacchino Ranucci (Istituto Nazionale di Fisica Nucleare, Italy)
Thursday, March 25, 2021
from
to
(Asia/Kolkata)
at Zoom
at Zoom
| Description |
Please contact rishi(at)theory(dot)tifr(dot)res(dot)in for the zoom meeting id and the password for this seminar. The liquid scintillator detector Borexino reported recently the direct observation of neutrinos produced in the carbon-itrogen-oxygen (CNO) fusion cycle in the Sun. This is the first experimental evidence of the existence of such reaction sequence in a star. The CNO solar neutrino interaction rate is 7.2 +3.0 −1.7 counts per day per 100 tons of target at 68% C.L., corresponding to a flux of neutrinos on Earth of 7.0 +3.0 −2.0 ×108 cm−2 s −1. The absence of CNO signal is disfavored at 5.0σ. In this seminar, I will describe the technological effort to stabilize the detector and understand the background, which is at root of this achievement, together with the main features of the analysis procedure exploited to extract the CNO signal. https://youtu.be/7nwV7m3YnNk |
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