Radar for salt ultra-high-energy neutrino detector and contribution of W-gluon fusion process to collision of neutrinos against protons

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• 作者：Masami Chiba ; Yoko Arakawa ; Toshio Kamijo ; Fumiaki Yabuki ; Osamu Yasuda ; Yuichi Chikashige ; Keisuke Ibe ; Tadashi Kon ; Yutaka Shimizu ; Yasuyuki Taniuchi ; Michiaki Utsumi ; Masatoshi Fujii
• 关键词：Ultra-high-energy neutrino ; Interaction cross-section ; W& ; Z-gluon fusion ; Radar ; Rock salt ; Electron beam irradiation
• 刊名：Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
• 出版年：2009
• 出版时间：1 June 2009
• 年：2009
• 卷：604
• 期：1-2, Supplement 1
• 页码：S233-S235
• 全文大小：254 K

文摘

Existence of GZK neutrinos (ultra-high-energy neutrinos) has been justified although the flux is estimated to be extremely low. A study of radar method of UHF radio wave was carried out using a 2 MeV electron beam on a rock salt target. Radio wave reflection was reproduced in UHF and the reflection rate was consistent with microwave reflection in X-ray irradiation. Reflected power of radio wave was proportional to a temperature of the rock salt target. A new contribution of W- and Z-gluon fusion processes as well as W and Z exchange were taken into account to calculate cross-sections of UHE neutrinos against nucleons with GRACE. Nucleon structure function of CTEQ6 including low x>10⁻⁸ was employed, we obtained 1.5 times larger cross-sections than those without them.