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. 2025 Jun 13;134(23):231802.
doi: 10.1103/r2qy-9hft.

Observation of Collider Neutrinos without Final State Muons with the SND@LHC Experiment

D Abbaneo  1 S Ahmad  1   2   3   4   5   6   7   8   9   10   11   12   13   14   15   16   17   18   19   20   21   22   23   24   25   26   27   28   29   30   31   32   33   34   35   36   37   38   39   40 R Albanese  2   3 A Alexandrov  2 F Alicante  2   3 K Androsov  4 A Anokhina  5 T Asada  2   3 C Asawatangtrakuldee  6 M A Ayala Torres  7   30 C Battilana  8   9 A Bay  4 A Bertocco  2   3 C Betancourt  10 D Bick  11 R Biswas  1 A Blanco Castro  12 V Boccia  2   3 M Bogomilov  13 D Bonacorsi  8   9 W M Bonivento  14 P Bordalo  12 A Boyarsky  15   16 S Buontempo  2 V Cafaro  8 M Campanelli  17 T Camporesi  1 V Canale  2   3 D Centanni  2   18 F Cerutti  1 M Chernyavskiy  5 K-Y Choi  19 S Cholak  4 F Cindolo  8 M Climescu  20 A P Conaboy  21 A Crupano  8 G M Dallavalle  8 D Davino  2   22 P T de Bryas  4 G De Lellis  2   3 M De Magistris  2   18 A De Roeck  1 A De Rújula  1 M De Serio  23   24 D De Simone  10 A Di Crescenzo  2   3 D Di Ferdinando  25 C Dinc  26 R Donà  8   9 O Durhan  26 D Fasanella  8 F Fedotovs  17 M Ferrillo  10 M Ferro-Luzzi  1 R A Fini  23 A Fiorillo  2   3 R Fresa  2   27 W Funk  1 F M Garay Walls  28 V Giordano  8 A Golovatiuk  2   3 A Golutvin  29 E Graverini  4 A M Guler  1   26 V Guliaeva  5 G J Haefeli  4 C Hagner  11 J C Helo Herrera  30   31 E van Herwijnen  29 P Iengo  2 S Ilieva  1   13 A Infantino  1 A Iuliano  2   3 R Jacobsson  1 C Kamiscioglu  26   32 A M Kauniskangas  4 E Khalikov  5 S H Kim  33 Y G Kim  34 G Klioutchnikov  1 M Komatsu  35 N Konovalova  5 S Kuleshov  7   30 L Krzempek  1   2   3 H M Lacker  21 O Lantwin  2 F Lasagni Manghi  8 A Lauria  2   3 K Y Lee  33 K S Lee  36 V P Loschiavo  2   22 A Margiotta  8   9 A Mascellani  4 F Mei  9 A Miano  2   3 A Mikulenko  15 M C Montesi  2   3 F L Navarria  8   9 W Nuntiyakul  37 S Ogawa  38 N Okateva  5 M Ovchynnikov  15 G Paggi  8   9 B D Park  33 A Pastore  23 A Perrotta  8 D Podgrudkov  5 N Polukhina  5 F Primavera  8 A Prota  2   3 A Quercia  2   3 S Ramos  12 A Reghunath  21 T Roganova  5 F Ronchetti  4 T Rovelli  8   9 O Ruchayskiy  39 T Ruf  1 M Sabate Gilarte  1 M Samoilov  5 V Scalera  2   18 W Schmidt-Parzefall  11 O Schneider  4 G Sekhniaidze  2 N Serra  10 M Shaposhnikov  4 V Shevchenko  5 T Shchedrina  5 L Shchutska  4 H Shibuya  38 S Simone  23   24 G Sirri  8 G Soares  12 J Y Sohn  33 O J Soto Sandoval  30   31 M Spurio  8   9 N Starkov  5 J Steggemann  4 I Timiryasov  39 V Tioukov  2 F Tramontano  2   3 C Trippl  4 E Ursov  5 A Ustyuzhanin  2   40 G Vankova-Kirilova  13 G Vasquez  10 V Verguilov  13 N Viegas Guerreiro Leonardo  12 C Vilela  12 C Visone  2   3 R Wanke  20 E Yaman  26 Z Yang  4 C Yazici  26 C S Yoon  33 E Zaffaroni  4 J Zamora Saa  7   30 SND@LHC Collaboration
Affiliations

Observation of Collider Neutrinos without Final State Muons with the SND@LHC Experiment

D Abbaneo et al. Phys Rev Lett. .

Abstract

We report the observation of neutrino interactions without final state muons at the LHC, with a significance of 6.4σ. A dataset of proton-proton collisions at sqrt[s]=13.6 TeV collected by SND@LHC in 2022 and 2023 is used, corresponding to an integrated luminosity of 68.6 fb^{-1}. Neutrino interactions without a reconstructed muon are selected, resulting in an event sample consisting mainly of neutral-current and electron neutrino charged-current interactions in the detector. After selection cuts, 9 neutrino interaction candidate events are observed with an estimated background of 0.32 events.

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