Discriminating between Higgs Production Mechanisms via Jet Charge at the LHC

Li, Hai Tao; Yan, Bin; Yuan, C. P.

doi:10.1103/physrevlett.131.041802

Cited by 6 publications

(3 citation statements)

References 66 publications

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“…This study provides insights into the factors that affect the correlation between jet charge and fragmentation methods of different generators. This result has substantial implications for precise electroweak and flavor physics measurements, such as the forward-backward asymmetry A FB and the electroweak mixing angle sin 2 θ W [16][17][18], the time-dependent CP measurement [28][29][30][31], and the Higgs properties measurement at high-energy frontier [5,6]. In the future, jet charge identification is expected to be extended to multi-jet events, other center-of-mass energy frontiers, and other collision environments such as pp colliders.…”

Section: Jhep05(2024)210mentioning

confidence: 99%

“…As a result, when these colored SM particles are produced in high-energy colliders, they fragment into sets of collimated final state particles, primarily hadrons [3], creating streams of particles known as jets. It is of great interest to distinguish the original species of colored SM particles within a jet, for instance, in measuring the properties of the Higgs at the high-energy frontier [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

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Jet charge identification in the e+e− → Z → $$ \textrm{q}\overline{\textrm{q}} $$ process at Z pole

Cui,

Zhao,

Wang

et al. 2024

J. High Energ. Phys.

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Accurate jet charge identification is essential for precise electroweak and flavor measurements at the high-energy frontier. We propose a novel method called the Leading Particle Jet Charge method (LPJC) to determine the jet charge based on information of the leading charged particle. Tested on Z →$$ b\overline{b} $$ b b ¯ and Z →$$ c\overline{c} $$ c c ¯ samples at center-of-mass energy of 91.2 GeV, the LPJC achieves an effective tagging power ϵeff of 20%/9% for c/b jet, respectively. In combination with the Weighted Jet Charge method (WJC), we develop a Heavy Flavor Jet Charge method (HFJC), which achieves an effective tagging power ϵeff of 39%/20% for c/b jet, respectively. This paper also discusses the dependencies between jet charge identification performance and the fragmentation process of heavy flavor jets, as well as critical detector performances.

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Section: Jhep05(2024)210mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Jet charge identification in the e+e− → Z → $$ \textrm{q}\overline{\textrm{q}} $$ process at Z pole

Cui,

Zhao,

Wang

et al. 2024

J. High Energ. Phys.

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“…A wide variety of quark and gluon discriminants have been proposed, e.g., in refs. [26][27][28][29][30][31][32][33][34][35]. To first approximation, the main underlying feature is that the initiating energetic quark radiates soft or collinear gluons in proportion to its color factor C F = 4/3, while initiating hard gluons radiate additional gluons proportional to the factor C A = 3, making gluon-initiated jets "broader" or more "diffuse" than quark-initated jets.…”

Section: Introductionmentioning

confidence: 99%

Probing light quark Yukawa couplings through angularity distributions in Higgs boson decay

Yan,

Lee

2024

J. High Energ. Phys.

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We propose to utilize angularity distributions in Higgs boson decay to probe light quark Yukawa couplings at e+e− colliders. Angularities τa are a class of 2-jet event shapes with variable and tunable sensitivity to the distribution of radiation in hadronic jets in the final state. Using soft-collinear effective theory (SCET), we present a prediction of angularity distributions from Higgs decaying to quark and gluon states at e+e− colliders to NNLL + 𝒪(αs) accuracy. Due to the different color structures in quark and gluon jets, the angularity distributions from H → $$q\overline{q }$$ and H → gg show different behaviors and can be used to constrain the light quark Yukawa couplings. We show that the upper limit of light quark Yukawa couplings could be probed to the level of ~ 15% of the bottom quark Yukawa coupling in the Standard Model in a conservative analysis window far away from nonperturbative effects and other uncertainties; the limit can be pushed to ≲ 7 – 9% with better control of the nonperturbative effects especially on gluon angularity distributions and/or with multiple angularities.

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Probing the Hgg coupling through the jet charge correlation in Higgs boson decay

Wang,

Yan

2023

Phys. Rev. D

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Discriminating between Higgs Production Mechanisms via Jet Charge at the LHC

Cited by 6 publications

References 66 publications

Jet charge identification in the e+e− → Z → $$ \textrm{q}\overline{\textrm{q}} $$ process at Z pole

Jet charge identification in the e+e− → Z → $$ \textrm{q}\overline{\textrm{q}} $$ process at Z pole

Probing light quark Yukawa couplings through angularity distributions in Higgs boson decay

Probing the Hgg coupling through the jet charge correlation in Higgs boson decay

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