Top-quark mass determination from t-channel single top production at the LHC

Gao, Mei Sen; Yuan, S.; Gao, Jun

doi:10.1007/jhep04(2021)054

Cited by 3 publications

(3 citation statements)

References 96 publications

(133 reference statements)

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“…3 GeV is approximated through the use of NLO K -factors) [25]. Finally, the single-top production process has been used to assess top-quark mass bounds [26,27], in some cases using NNLO theory predictions [28], although the process itself shows a reduced sensitivity. A summary of further top-quark mass measurements can be found in Ref.…”

Section: Introductionmentioning

confidence: 99%

Constraining the top-quark mass within the global MSHT PDF fit

Cridge,

Lim

2023

Eur. Phys. J. C

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We examine the ability of experimental measurements of top-quark pair production to constrain both the top-quark mass and the strong coupling within the global MSHT parton distribution function (PDF) fit. Specifically, we consider ATLAS and CMS measurements of differential distributions taken at a centre-of-mass energy of 8 TeV, as well as $$ t\bar{t}$$ t t ¯ total cross section data taken at a variety of experiments, and compare to theoretical predictions including next-to-next-to-leading order corrections. We find that supplementing the global fit with this additional information results in relatively strong constraints on the top-quark mass, and is also able to bound the strong coupling in a limited fashion. Our final result is $$m_t=173.0\pm 0.6~\textrm{GeV}$$ m t = 173.0 ± 0.6 GeV and is compatible with the world average pole mass extracted from cross section measurements of $$172.5\pm 0.7~\textrm{GeV}$$ 172.5 ± 0.7 GeV by the Particle Data Group. We also study the effect of different top-quark masses on the gluon parton distribution function, finding changes at high x which nonetheless lie within the large PDF uncertainties in this region.

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Section: Introductionmentioning

confidence: 99%

Constraining the top-quark mass within the global MSHT PDF fit

Cridge,

Lim

2023

Eur. Phys. J. C

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“…The top-quark OS mass has been investigated in detail in Refs. [33][34][35][36][37][38][39][40][41][42][43][44][45][46][47][48][49][50][51][52]. This mass can be related to the modified minimal subtraction ( ) scheme running mass by using the perturbative relations between the top-quark bare mass ( ) and renormalized mass in the OS-or -scheme, e.g., and .…”

Section: Introduction Ppmentioning

confidence: 99%

Precise determination of the top-quark on-shell mass via its scale- invariant perturbative relation to the top-quark mass *

Huang 黄,

Wu 吴,

Zheng 郑

et al. 2024

Chinese Phys. C

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It has been shown that the principle of maximum conformality (PMC) provides a systematic way to solve conventional renormalization scheme and scale ambiguities. The scale-fixed predictions for physical observables using the PMC are independent of the choice of renormalization scheme -- a key requirement of renormalization group invariance. In the paper, we derive new degeneracy relations based on the renormalization group equations that involve both the usual $\beta$-function and the quark mass anomalous dimension $\gamma_m$-function, respectively. These new degeneracy relations lead to an improved PMC scale-setting procedures, such that the correct magnitudes of the strong coupling constant and the $\overline{\rm MS}$-running quark mass can be fixed simultaneously. By using the improved PMC scale-setting procedures, the renormalization scale dependence of the $\overline{\rm MS}$-on-shell quark mass relation can be eliminated systematically. Consequently, the top-quark on-shell (or $\overline{\rm MS}$) mass can be determined without conventional renormalization scale ambiguity. Taking the top-quark $\overline{\rm MS}$ mass ${\overline m}_t({\overline m}_t)=162.5^{+2.1}_{-1.5}$ GeV as the input, we obtain $M_t\simeq 172.41^{+2.21}_{-1.57}$ GeV. Here the uncertainties are combined errors with those also from $\Delta \alpha_s(M_Z)$ and the approximate uncertainty stemming from the uncalculated five-loop terms predicted through the Pad'{e} approximation approach. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Article funded by SCOAP3 and published under licence by Chinese Physical Society and the Institute of High Energy Physics of the Chinese Academy of Science and the Institute of Modern Physics of the Chinese Academy of Sciences and IOP Publishing Ltd.

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“…3 GeV is approximated through the use of NLO K-factors) [25]. Finally, the single-top production process has been used to assess top-quark mass bounds [26,27], in some cases using NNLO theory predictions [28], although the process itself shows a reduced sensitivity. A summary of further top-quark mass measurements can be found in ref.…”

Section: Introductionmentioning

confidence: 99%

PDF4LHC21: Update on the benchmarking of the CT, MSHT and NNPDF global PDF fits

Cridge

2022

SciPost Phys. Proc.

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There have been recent updates to the three global PDF fits (CT, MSHT and NNPDF), all adding large amounts of data from the LHC, and this has resulted in significant changes to the global PDFs. Given the impact that the new PDFs will have on physics comparisons at the LHC, it is crucial to perform a benchmarking among the PDFs, similar in spirit to that which was carried out for PDF4LHC15, widely used for LHC physics. In this article we detail a benchmarking comparison of three global PDF sets - CT18, MSHT20 and NNPDF3.1 - and their similarities and differences that have been observed. The end result of this study will be a new PDF4LHC21 ensemble of combined PDFs suitable for a wide range of LHC applications.

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Top-quark mass determination from t-channel single top production at the LHC

Cited by 3 publications

References 96 publications

Constraining the top-quark mass within the global MSHT PDF fit

Constraining the top-quark mass within the global MSHT PDF fit

Precise determination of the top-quark on-shell mass via its scale- invariant perturbative relation to the top-quark mass *

PDF4LHC21: Update on the benchmarking of the CT, MSHT and NNPDF global PDF fits

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