Final tau-neutrino results from the DONuT experiment
Final tau-neutrino results from the DONuT experiment
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DOI：
10.1103/physrevd.78.052002
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发表时间：
2008-09-01
影响因子：
5
通讯作者：
Schneps, J.
中科院分区：
文献类型：
--
作者：
Kodama, K.;Ushida, N.;Schneps, J.
DONuT实验在1997年收集了数据，并在2000年基于四个观测到的v（tau）充电电流（CC）相互作用发表了第一个结果。本文介绍了在费米实验室用800 GeV Tevatron束对靶进行3.6 × 10 ~（17）个质子的实验中收集的数据的最后分析。在总共观测到的578个中微子相互作用中，观测到的v（tau）CC事件的数量是9个，估计背景事件为1.5个。我们计算的v（τ）CC截面作为一个参数的函数。假设d-s介子是v（τ）的唯一源，则总CC截面的能量无关部分可以参数化为sigma（const）（v（τ））= 2.51n（1.52）x 10（-40）cm（2）GeV-1，n >= 4，其中n是控制形式为d σ/dx（F）的Ds微分截面的纵向部分的参数，（1-竖线x（F）竖线）（n）。分析无法区分v（tau）和（v）与bar（tau）。从PYTHIA模拟获得的n值，n = 6.1，给出了sigma（const）（v（tau））=（0.39 +/- 0.13 +/- 0.13）x 10（-38）cm（2）GeV-1的估计值。
The DONuT experiment collected data in 1997 and published first results in 2000 based on four observed v(tau) charged-current (CC) interactions. The final analysis of the data collected in the experiment is presented in this paper, based on 3.6 x 10(17) protons on target using the 800 GeV Tevatron beam at Fermilab. The number of observed v(tau) CC events is 9 with an estimated background of 1.5 events, from a total of 578 observed neutrino interactions. We calculate the v(tau) CC cross section as a function of one parameter. Assuming D-s mesons are the sole source for v(tau), the energy-independent part of the total CC cross section can be parametrized as sigma(const)(v(tau)) = 2.51n(1.52) x 10(-40) cm(2) GeV-1 for n >= 4, where n is the parameter controlling the longitudinal part of the Ds differential cross section of the form d sigma/dx(F) proportional to (1-vertical bar x(F)vertical bar)(n). The analysis could not distinguish between v(tau) and (v) over bar (tau). The value of n obtained from PYTHIA simulations, n = 6.1, gives an estimated value of sigma(const)(v(tau))= (0.39 +/- 0.13 +/- 0.13) x 10(-38) cm(2) GeV-1.