Limits...
Search for invisible particles produced in association with single-top-quarks in proton-proton collisions at [Formula: see text] with the ATLAS detector.

- Eur Phys J C Part Fields (2015)

Bottom Line: No deviation from the standard model prediction is observed, and upper limits are set on the production cross-section for resonant and non-resonant production of an invisible exotic state in association with a right-handed top quark.In the case of resonant production, for a spin-[Formula: see text] resonance with a mass of [Formula: see text] GeV, an effective coupling strength above [Formula: see text] is excluded at 95[Formula: see text] confidence level for the top quark and an invisible spin-[Formula: see text] state with mass between [Formula: see text] and [Formula: see text] GeV.In the case of non-resonant production, an effective coupling strength above [Formula: see text] is excluded at 95[Formula: see text] confidence level for the top quark and an invisible spin-[Formula: see text] state with mass between [Formula: see text] and [Formula: see text] GeV.

View Article: PubMed Central - PubMed

Affiliation: CPPM, Aix-Marseille Université and CNRS/IN2P3, Marseille, France.

ABSTRACT

A search for the production of single-top-quarks in association with missing energy is performed in proton-proton collisions at a centre-of-mass energy of [Formula: see text] with the ATLAS experiment at the large hadron collider using data collected in 2012, corresponding to an integrated luminosity of [Formula: see text] fb[Formula: see text]. In this search, the [Formula: see text] boson from the top quark is required to decay into an electron or a muon and a neutrino. No deviation from the standard model prediction is observed, and upper limits are set on the production cross-section for resonant and non-resonant production of an invisible exotic state in association with a right-handed top quark. In the case of resonant production, for a spin-[Formula: see text] resonance with a mass of [Formula: see text] GeV, an effective coupling strength above [Formula: see text] is excluded at 95[Formula: see text] confidence level for the top quark and an invisible spin-[Formula: see text] state with mass between [Formula: see text] and [Formula: see text] GeV. In the case of non-resonant production, an effective coupling strength above [Formula: see text] is excluded at 95[Formula: see text] confidence level for the top quark and an invisible spin-[Formula: see text] state with mass between [Formula: see text] and [Formula: see text] GeV.

No MeSH data available.


Related in: MedlinePlus

Example of Feynman diagrams of leading-order processes leading to monotop events: (left) production of a coloured scalar resonance  decaying into a top quark and a spin- fermion  in the resonant model, and (middle) - and (right) -channel non-resonant production of a top quark in association with a spin-1 boson  in the non-resonant model
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Fig1: Example of Feynman diagrams of leading-order processes leading to monotop events: (left) production of a coloured scalar resonance decaying into a top quark and a spin- fermion in the resonant model, and (middle) - and (right) -channel non-resonant production of a top quark in association with a spin-1 boson in the non-resonant model

Mentions: Non-resonant production of a neutral, colour singlet, spin-1 boson, , in association with a right-handed top quark.


Search for invisible particles produced in association with single-top-quarks in proton-proton collisions at [Formula: see text] with the ATLAS detector.

- Eur Phys J C Part Fields (2015)

Example of Feynman diagrams of leading-order processes leading to monotop events: (left) production of a coloured scalar resonance  decaying into a top quark and a spin- fermion  in the resonant model, and (middle) - and (right) -channel non-resonant production of a top quark in association with a spin-1 boson  in the non-resonant model
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC4376466&req=5

Fig1: Example of Feynman diagrams of leading-order processes leading to monotop events: (left) production of a coloured scalar resonance decaying into a top quark and a spin- fermion in the resonant model, and (middle) - and (right) -channel non-resonant production of a top quark in association with a spin-1 boson in the non-resonant model
Mentions: Non-resonant production of a neutral, colour singlet, spin-1 boson, , in association with a right-handed top quark.

Bottom Line: No deviation from the standard model prediction is observed, and upper limits are set on the production cross-section for resonant and non-resonant production of an invisible exotic state in association with a right-handed top quark.In the case of resonant production, for a spin-[Formula: see text] resonance with a mass of [Formula: see text] GeV, an effective coupling strength above [Formula: see text] is excluded at 95[Formula: see text] confidence level for the top quark and an invisible spin-[Formula: see text] state with mass between [Formula: see text] and [Formula: see text] GeV.In the case of non-resonant production, an effective coupling strength above [Formula: see text] is excluded at 95[Formula: see text] confidence level for the top quark and an invisible spin-[Formula: see text] state with mass between [Formula: see text] and [Formula: see text] GeV.

View Article: PubMed Central - PubMed

Affiliation: CPPM, Aix-Marseille Université and CNRS/IN2P3, Marseille, France.

ABSTRACT

A search for the production of single-top-quarks in association with missing energy is performed in proton-proton collisions at a centre-of-mass energy of [Formula: see text] with the ATLAS experiment at the large hadron collider using data collected in 2012, corresponding to an integrated luminosity of [Formula: see text] fb[Formula: see text]. In this search, the [Formula: see text] boson from the top quark is required to decay into an electron or a muon and a neutrino. No deviation from the standard model prediction is observed, and upper limits are set on the production cross-section for resonant and non-resonant production of an invisible exotic state in association with a right-handed top quark. In the case of resonant production, for a spin-[Formula: see text] resonance with a mass of [Formula: see text] GeV, an effective coupling strength above [Formula: see text] is excluded at 95[Formula: see text] confidence level for the top quark and an invisible spin-[Formula: see text] state with mass between [Formula: see text] and [Formula: see text] GeV. In the case of non-resonant production, an effective coupling strength above [Formula: see text] is excluded at 95[Formula: see text] confidence level for the top quark and an invisible spin-[Formula: see text] state with mass between [Formula: see text] and [Formula: see text] GeV.

No MeSH data available.


Related in: MedlinePlus