利用大型强子对撞机上的SND实验对对撞机μ子中微子进行观测。

Observation of Collider Muon Neutrinos with the SND@LHC Experiment.

作者信息

Albanese R, Alexandrov A, Alicante F, Anokhina A, Asada T, Battilana C, Bay A, Betancourt C, Biswas R, Blanco Castro A, Bogomilov M, Bonacorsi D, Bonivento W M, Bordalo P, Boyarsky A, Buontempo S, Campanelli M, Camporesi T, Canale V, Castro A, Centanni D, Cerutti F, Chernyavskiy M, Choi K-Y, Cholak S, Cindolo F, Climescu M, Conaboy A P, Dallavalle G M, Davino D, de Bryas P T, De Lellis G, De Magistris M, De Roeck A, De Rújula A, De Serio M, De Simone D, Di Crescenzo A, Donà R, Durhan O, Fabbri F, Fedotovs F, Ferrillo M, Ferro-Luzzi M, Fini R A, Fiorillo A, Fresa R, Funk W, Garay Walls F M, Golovatiuk A, Golutvin A, Graverini E, Guler A M, Guliaeva V, Haefeli G J, Helo Herrera J C, van Herwijnen E, Iengo P, Ilieva S, Infantino A, Iuliano A, Jacobsson R, Kamiscioglu C, Kauniskangas A M, Khalikov E, Kim S H, Kim Y G, Klioutchnikov G, Komatsu M, Konovalova N, Kovalenko S, Kuleshov S, Lacker H M, Lantwin O, Lasagni Manghi F, Lauria A, Lee K Y, Lee K S, Lo Meo S, Loschiavo V P, Marcellini S, Margiotta A, Mascellani A, Miano A, Mikulenko A, Montesi M C, Navarria F L, Ogawa S, Okateva N, Ovchynnikov M, Paggi G, Park B D, Pastore A, Perrotta A, Podgrudkov D, Polukhina N, Prota A, Quercia A, Ramos S, Reghunath A, Roganova T, Ronchetti F, Rovelli T, Ruchayskiy O, Ruf T, Sabate Gilarte M, Samoilov M, Scalera V, Schneider O, Sekhniaidze G, Serra N, Shaposhnikov M, Shevchenko V, Shchedrina T, Shchutska L, Shibuya H, Simone S, Siroli G P, Sirri G, Soares G, Soto Sandoval O J, Spurio M, Starkov N, Timiryasov I, Tioukov V, Tramontano F, Trippl C, Ursov E, Ustyuzhanin A, Vankova-Kirilova G, Verguilov V, Viegas Guerreiro Leonardo N, Vilela C, Visone C, Wanke R, Yaman E, Yazici C, Yoon C S, Zaffaroni E, Zamora Saa J

机构信息

Sezione INFN di Napoli, 80126 Napoli, Italy.

Università di Napoli "Federico II", 80126 Napoli, Italy.

出版信息

Phys Rev Lett. 2023 Jul 21;131(3):031802. doi: 10.1103/PhysRevLett.131.031802.

DOI:10.1103/PhysRevLett.131.031802

PMID:37540851

Abstract

We report the direct observation of muon neutrino interactions with the SND@LHC detector at the Large Hadron Collider. A dataset of proton-proton collisions at sqrt[s]=13.6 TeV collected by SND@LHC in 2022 is used, corresponding to an integrated luminosity of 36.8 fb^{-1}. The search is based on information from the active electronic components of the SND@LHC detector, which covers the pseudorapidity region of 7.2<η<8.4, inaccessible to the other experiments at the collider. Muon neutrino candidates are identified through their charged-current interaction topology, with a track propagating through the entire length of the muon detector. After selection cuts, 8 ν_{μ} interaction candidate events remain with an estimated background of 0.086 events, yielding a significance of about 7 standard deviations for the observed ν_{μ} signal.

摘要

我们报告了在大型强子对撞机上利用SND@LHC探测器对μ子中微子相互作用的直接观测。使用了SND@LHC在2022年收集的质心能量(\sqrt{s}=13.6) TeV的质子-质子碰撞数据集，对应于36.8 (fb^{-1})的积分亮度。该搜索基于SND@LHC探测器有源电子元件的信息，该探测器覆盖了(7.2<\eta<8.4)的伪快度区域，这是对撞机上其他实验无法触及的。μ子中微子候选者通过其带电流相互作用拓扑结构来识别，有一条径迹贯穿μ子探测器的整个长度。经过筛选切割后，剩余8个(\nu_{\mu})相互作用候选事件，估计背景为0.086个事件，观测到的(\nu_{\mu})信号的显著性约为7个标准差。