Search for Higgs boson exotic decays into Lorentz-boosted light bosons in the four-τ final state at √s=13 TeV with the ATLAS detector

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F25%3A00644316" target="_blank" >RIV/68378271:_____/25:00644316 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11320/25:10511273 RIV/61989592:15310/25:73634869

Výsledek na webu

<a href="https://hdl.handle.net/11104/0374230" target="_blank" >https://hdl.handle.net/11104/0374230</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.physletb.2025.139843" target="_blank" >10.1016/j.physletb.2025.139843</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Search for Higgs boson exotic decays into Lorentz-boosted light bosons in the four-τ final state at √s=13 TeV with the ATLAS detector

Popis výsledku v původním jazyce

A search for exotic decays of the Higgs boson into a pair of low-mass scalars that subsequently decay into τ-leptons, H→aa→τ+τ−τ+τ−, is presented. In models with Yukawa-like couplings, the decay to τ-leptons is favoured for light a-bosons, with mass in the range of 2mτ<ma<2mb. Results are presented in the range of 4GeV<ma<15GeV using the 140fb−1 of proton–proton collisions at √s=13TeV recorded with the ATLAS detector during Run2 of the Large Hadron Collider. This search focuses on the scenario where, for both di-τ pairs, one of the τ-leptons decays to hadrons and neutrinos, while the other decays to a muon and neutrinos. In this mass range, the a→τ+τ− is Lorentz-boosted and a dedicated muon removal technique is used to reconstruct the di-τ pairs. No significant excess above the Standard Model background prediction is observed. Upper limits on (σ(H)/σSM(H))×B(H→aa→4τ) at 95% confidence level are provided, ranging from 0.03 to 0.10 depending on the a-boson mass.

Název v anglickém jazyce

Search for Higgs boson exotic decays into Lorentz-boosted light bosons in the four-τ final state at √s=13 TeV with the ATLAS detector

Popis výsledku anglicky

A search for exotic decays of the Higgs boson into a pair of low-mass scalars that subsequently decay into τ-leptons, H→aa→τ+τ−τ+τ−, is presented. In models with Yukawa-like couplings, the decay to τ-leptons is favoured for light a-bosons, with mass in the range of 2mτ<ma<2mb. Results are presented in the range of 4GeV<ma<15GeV using the 140fb−1 of proton–proton collisions at √s=13TeV recorded with the ATLAS detector during Run2 of the Large Hadron Collider. This search focuses on the scenario where, for both di-τ pairs, one of the τ-leptons decays to hadrons and neutrinos, while the other decays to a muon and neutrinos. In this mass range, the a→τ+τ− is Lorentz-boosted and a dedicated muon removal technique is used to reconstruct the di-τ pairs. No significant excess above the Standard Model background prediction is observed. Upper limits on (σ(H)/σSM(H))×B(H→aa→4τ) at 95% confidence level are provided, ranging from 0.03 to 0.10 depending on the a-boson mass.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10303 - Particles and field physics

Projekt

<a href="/cs/project/EH22_008%2F0004632" target="_blank" >EH22_008/0004632: Výzkum základních stavebních kamenů hmoty s využitím špičkových technologií</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Physics Letters. B

ISSN

0370-2693

e-ISSN

1873-2445

Svazek periodika

870

Číslo periodika v rámci svazku

Nov

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

18

Strana od-do

139843

Kód UT WoS článku

001639025700001

EID výsledku v databázi Scopus

2-s2.0-105026828934