ENUBET:用于高精度截面测量的监测中微子束

C. Delogu, F. Acerbi, I. Angelis, L. Bomben, M. Bonesini, F. Bramati, A. Branca, C. Brizzolari, G. Brunetti, M. Calviani, S. Capelli, S. Carturan, M. Catanesi, S. Cecchini, N. Charitonidis, F. Cindolo, G. Cogo, G. Collazuol, F. Dal Corso, G. De Rosa, A. Falcone, B. Goddard, A. Gola, L. Halić, F. Iacob, C. Jollet, V. Kain, A. Kallitsopoulou, B. Kliček, Y. Kudenko, C. Lampoudis, M. Laveder, P. Legou, A. Longhin, L. Ludovici, E. Lutsenko, L. Magaletti, G. Mandrioli, S. Marangoni, A. Margotti, V. Mascagna, N. Mauri, L. Meazza, A. Meregaglia, M. Mezzetto, M. Nessi, A. Paoloni, M. Pari, T. Papaevangelou, E. Parozzi, L. Pasqualini, G. Paternoster, L. Patrizii, M. Pozzato, M. Prest, F. Pupilli, E. Radicioni, A. Ruggeri, D. Sampsonidis, C. Scian, G. Sirri, M. Stipčević, M. Tenti, F. Terranova, M. Torti, S. Tzamarias, E. Vallazza, F. Velotti, L. Votano
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引用次数: 1

摘要

GeV尺度上的中微子截面测量系统不确定性的主要来源是对初始通量的不了解。将这种不确定性降低到1%的目标可以通过监测与中微子相关的带电轻子来实现,通过适当地测量传统窄带中微子束的衰变区域。介子的大角度介子和正电子是通过在衰变隧道壁上的采样量热计测量的,而强子倾倒后的介子站可以用来监测介子衰变中的中微子成分。该仪器可以提供对所有能量的μ子和电子中微子通量的全面控制。此外,由于光束的窄动量宽度(<10%)与中微子探测器处相互作用的径向位置相关,因此可以在一个事件的基础上对中微子能量进行O(10%)测量。ENUBET项目于2016年由ERC资助,旨在证明这种监测中微子束的可行性,并在CERN中微子平台(NP06)和物理超越对撞机计划的框架内进行。在我们的贡献中,我们总结了ENUBET的设计,物理性能以及它在与下一个长基线中微子实验相当的时间尺度上实现的机会。
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ENUBET: A monitored neutrino beam for high precision cross section measurements
The main source of systematic uncertainty on neutrino cross section measurements at the GeV scale is represented by the poor knowledge of the initial flux. The goal of cutting down this uncertainty to 1% can be achieved through the monitoring of charged leptons produced in association with neutrinos, by properly instrumenting the decay region of a conventional narrow-band neutrino beam. Large angle muons and positrons from kaons are measured by a sampling calorimeter on the decay tunnel walls (tagger), while muon stations after the hadron dump can be used to monitor the neutrino component from pion decays. This instrumentation can provide a full control on both the muon and electron neutrino fluxes at all energies. Furthermore, the narrow momentum width (<10%) of the beam provides a O(10%) measurement of the neutrino energy on an event by event basis, thanks to its correlation with the radial position of the interaction at the neutrino detector. The ENUBET project has been funded by the ERC in 2016 to prove the feasibility of such a monitored neutrino beam and is cast in the framework of the CERN neutrino platform (NP06) and the Physics Beyond Colliders initiative. In our contribution, we summarize the ENUBET design, physics performance and opportunities for its implementation in a timescale comparable with next long baseline neutrino experiments.
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