Search for a heavy neutral lepton that mixes predominantly with the tau neutrino

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F24%3A10494127" target="_blank" >RIV/00216208:11320/24:10494127 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=vGktRmisEf" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=vGktRmisEf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevD.109.L111102" target="_blank" >10.1103/PhysRevD.109.L111102</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Search for a heavy neutral lepton that mixes predominantly with the tau neutrino

Popis výsledku v původním jazyce

We report a search for a heavy neutral lepton (HNL) that mixes predominantly with ντ. The searchutilizes data collected with the Belle detector at the KEKB asymmetric energy eþe- collider. The datasample was collected at and just below the center-of-mass energies of the ϒð4SÞ and ϒð5SÞ resonances andhas an integrated luminosity of 915 fb-1, corresponding to ð836 12Þ x 106 eþe- RIGHTWARDS ARROW τþτ- events. Wesearch for production of the HNL (denoted N) in the decay τ- RIGHTWARDS ARROW π-N followed by its decay viaN RIGHTWARDS ARROW μþμ-ντ. The search focuses on the parameter-space region in which the HNL is long-lived, so that theμþμ- originate from a common vertex that is significantly displaced from the collision point of the KEKBbeams. Consistent with the expected background yield, one event is observed in the data sample afterapplication of all the event-selection criteria.We report limits on the mixing parameter of the HNL with theτ neutrino as a function of the HNL mass.

Název v anglickém jazyce

Search for a heavy neutral lepton that mixes predominantly with the tau neutrino

Popis výsledku anglicky

We report a search for a heavy neutral lepton (HNL) that mixes predominantly with ντ. The searchutilizes data collected with the Belle detector at the KEKB asymmetric energy eþe- collider. The datasample was collected at and just below the center-of-mass energies of the ϒð4SÞ and ϒð5SÞ resonances andhas an integrated luminosity of 915 fb-1, corresponding to ð836 12Þ x 106 eþe- RIGHTWARDS ARROW τþτ- events. Wesearch for production of the HNL (denoted N) in the decay τ- RIGHTWARDS ARROW π-N followed by its decay viaN RIGHTWARDS ARROW μþμ-ντ. The search focuses on the parameter-space region in which the HNL is long-lived, so that theμþμ- originate from a common vertex that is significantly displaced from the collision point of the KEKBbeams. Consistent with the expected background yield, one event is observed in the data sample afterapplication of all the event-selection criteria.We report limits on the mixing parameter of the HNL with theτ neutrino as a function of the HNL mass.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10300 - Physical sciences

Projekt

<a href="/cs/project/GA22-18469S" target="_blank" >GA22-18469S: Studium jevů za Standardním modelem ve flavor sektoru na experimentu Belle II</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2024

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Physical Review D

ISSN

2470-0010

e-ISSN

2470-0029

Svazek periodika

109

Číslo periodika v rámci svazku

11

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

10

Strana od-do

L111102

Kód UT WoS článku

001270349600004

EID výsledku v databázi Scopus

2-s2.0-85196008755