Search for heavy charged long-lived particles in proton–proton collisions at √s = 13 TeV using an ionisation measurement with the ATLAS detector

Agni Bethani; Brian Cox; Jonathan Crane; Cinzia Da Via; Nicholas Dann; Alessandra Forti; David Lack; Frederick Loebinger; Jiri Masik; Stephen Menary; Francisca Munoz Sanchez; Alexander Oh; Emily Orgill; Joleen Pater; Yvonne Peters; Andrew Pilkington; Darren Price; Yang Qin; Jacob Rawling; Nicolas Scharmberg; Savanna Shaw; Stephen Watts; Terence Wyatt; The ATLAS Collaboration

doi:10.1016/j.physletb.2018.10.055

Search for heavy charged long-lived particles in proton–proton collisions at √s = 13 TeV using an ionisation measurement with the ATLAS detector

Agni Bethani, Brian Cox, Jonathan Crane, Cinzia Da Via, Nicholas Dann, Alessandra Forti, David Lack, Frederick Loebinger, Jiri Masik, Stephen Menary, Francisca Munoz Sanchez, Alexander Oh, Emily Orgill, Joleen Pater, Yvonne Peters, Andrew Pilkington, Darren Price, Yang Qin, Jacob Rawling, Nicolas ScharmbergSavanna Shaw, Stephen Watts, Terence Wyatt, The ATLAS Collaboration

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Abstract

The inclusive production of four isolated charged leptons in pp collisions is analysed for the presence of hard double-parton scattering, using 20.2 fb ⁻¹ of data recorded in the ATLAS detector at the LHC at centre-of-mass energy s=8 TeV. In the four-lepton invariant-mass range of 80<m _4ℓ <1000 GeV, an artificial neural network is used to enhance the separation between single- and double-parton scattering based on the kinematics of the four leptons in the final state. An upper limit on the fraction of events originating from double-parton scattering is determined at 95% confidence level to be f _DPS =0.042, which results in an estimated lower limit on the effective cross section at 95% confidence level of 1.0 mb.

Original language	English
Pages (from-to)	96-116
Number of pages	20
Journal	Physics Letters B
Volume	788
Early online date	1 Nov 2018
DOIs	https://doi.org/10.1016/j.physletb.2018.10.055
Publication status	Published - 10 Jan 2019

Keywords

Double Drell–Yan
Double parton-scattering
Four-lepton production
Higgs golden decay channel

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Bethani, A., Cox, B., Crane, J., Da Via, C., Dann, N., Forti, A., Lack, D., Loebinger, F., Masik, J., Menary, S., Munoz Sanchez, F., Oh, A., Orgill, E., Pater, J., Peters, Y., Pilkington, A., Price, D., Qin, Y., Rawling, J., ... The ATLAS Collaboration (2019). Search for heavy charged long-lived particles in proton–proton collisions at √s = 13 TeV using an ionisation measurement with the ATLAS detector. Physics Letters B, 788, 96-116. https://doi.org/10.1016/j.physletb.2018.10.055

@article{33a5e52d27f346deb7c55a9ccb4e921d,

title = "Search for heavy charged long-lived particles in proton–proton collisions at √s = 13 TeV using an ionisation measurement with the ATLAS detector",

abstract = "The inclusive production of four isolated charged leptons in pp collisions is analysed for the presence of hard double-parton scattering, using 20.2 fb −1 of data recorded in the ATLAS detector at the LHC at centre-of-mass energy s=8 TeV. In the four-lepton invariant-mass range of 804ℓ <1000 GeV, an artificial neural network is used to enhance the separation between single- and double-parton scattering based on the kinematics of the four leptons in the final state. An upper limit on the fraction of events originating from double-parton scattering is determined at 95% confidence level to be f DPS =0.042, which results in an estimated lower limit on the effective cross section at 95% confidence level of 1.0 mb. ",

keywords = "Double Drell–Yan, Double parton-scattering, Four-lepton production, Higgs golden decay channel",

author = "Agni Bethani and Brian Cox and Jonathan Crane and {Da Via}, Cinzia and Nicholas Dann and Alessandra Forti and David Lack and Frederick Loebinger and Jiri Masik and Stephen Menary and {Munoz Sanchez}, Francisca and Alexander Oh and Emily Orgill and Joleen Pater and Yvonne Peters and Andrew Pilkington and Darren Price and Yang Qin and Jacob Rawling and Nicolas Scharmberg and Savanna Shaw and Stephen Watts and Terence Wyatt and {The ATLAS Collaboration}",

year = "2019",

month = jan,

day = "10",

doi = "10.1016/j.physletb.2018.10.055",

language = "English",

volume = "788",

pages = "96--116",

journal = "Physics Letters B",

issn = "0370-2693",

publisher = "Elsevier BV",

}

Bethani, A, Cox, B, Crane, J, Da Via, C, Dann, N, Forti, A, Lack, D, Loebinger, F, Masik, J, Menary, S, Munoz Sanchez, F , Oh, A, Orgill, E, Pater, J, Peters, Y , Pilkington, A , Price, D, Qin, Y, Rawling, J, Scharmberg, N, Shaw, S, Watts, S, Wyatt, T & The ATLAS Collaboration 2019, 'Search for heavy charged long-lived particles in proton–proton collisions at √s = 13 TeV using an ionisation measurement with the ATLAS detector', Physics Letters B, vol. 788, pp. 96-116. https://doi.org/10.1016/j.physletb.2018.10.055

TY - JOUR

T1 - Search for heavy charged long-lived particles in proton–proton collisions at √s = 13 TeV using an ionisation measurement with the ATLAS detector

AU - Bethani, Agni

AU - Cox, Brian

AU - Crane, Jonathan

AU - Da Via, Cinzia

AU - Dann, Nicholas

AU - Forti, Alessandra

AU - Lack, David

AU - Loebinger, Frederick

AU - Masik, Jiri

AU - Menary, Stephen

AU - Munoz Sanchez, Francisca

AU - Oh, Alexander

AU - Orgill, Emily

AU - Pater, Joleen

AU - Peters, Yvonne

AU - Pilkington, Andrew

AU - Price, Darren

AU - Qin, Yang

AU - Rawling, Jacob

AU - Scharmberg, Nicolas

AU - Shaw, Savanna

AU - Watts, Stephen

AU - Wyatt, Terence

AU - The ATLAS Collaboration,

PY - 2019/1/10

Y1 - 2019/1/10

N2 - The inclusive production of four isolated charged leptons in pp collisions is analysed for the presence of hard double-parton scattering, using 20.2 fb −1 of data recorded in the ATLAS detector at the LHC at centre-of-mass energy s=8 TeV. In the four-lepton invariant-mass range of 804ℓ <1000 GeV, an artificial neural network is used to enhance the separation between single- and double-parton scattering based on the kinematics of the four leptons in the final state. An upper limit on the fraction of events originating from double-parton scattering is determined at 95% confidence level to be f DPS =0.042, which results in an estimated lower limit on the effective cross section at 95% confidence level of 1.0 mb.

AB - The inclusive production of four isolated charged leptons in pp collisions is analysed for the presence of hard double-parton scattering, using 20.2 fb −1 of data recorded in the ATLAS detector at the LHC at centre-of-mass energy s=8 TeV. In the four-lepton invariant-mass range of 804ℓ <1000 GeV, an artificial neural network is used to enhance the separation between single- and double-parton scattering based on the kinematics of the four leptons in the final state. An upper limit on the fraction of events originating from double-parton scattering is determined at 95% confidence level to be f DPS =0.042, which results in an estimated lower limit on the effective cross section at 95% confidence level of 1.0 mb.

KW - Double Drell–Yan

KW - Double parton-scattering

KW - Four-lepton production

KW - Higgs golden decay channel

U2 - 10.1016/j.physletb.2018.10.055

DO - 10.1016/j.physletb.2018.10.055

M3 - Article

SN - 0370-2693

VL - 788

SP - 96

EP - 116

JO - Physics Letters B

JF - Physics Letters B

ER -

Search for heavy charged long-lived particles in proton–proton collisions at √s = 13 TeV using an ionisation measurement with the ATLAS detector

Abstract

Keywords

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