Skip to content
DraconiticResearch
Search Sources API
190,869 studies31 sourcesUpdated 29 min ago
Peer-reviewedCC BYPhysical review. D/Physical review. D.

Top-quark decay at next-to-next-to-next-to-leading order in QCD

  • Long Chen1
  • Xiang Chen2
  • Xin Guan2
  • Yan-Qing Ma2
  1. 1Shandong University
  2. 2Peking University
Open at sourceDOICite

Abstract

We present the first complete QCD corrections to the inclusive decay width Γ t , the W -helicity fractions f L , R , 0 and semi-inclusive distributions for the top-quark decay process t → b + W + + X QCD at next-to-next-to-next-to-leading order (NNNLO) in the strong coupling constant α s . In particular, the pure NNNLO QCD correction decreases Γ t by about 0.8% relative to the previous next-to-next-to-leading order (NNLO) result at the scale of the top-quark pole mass, exceeding the uncertainty estimated by the conventional scale-variation prescription. After taking into account errors from various sources, we get Γ t = 1.314 8 − 0.005 + 0.003 × | V t b | 2 + 0.027 ( m t − 172.69 ) GeV , whose uncertainty meets the request of future colliders. On the other hand, the NNNLO QCD effects on f L , R , 0 are found to be much smaller, at the level of one one per mille for the dominant f 0 , making them precision observables for the top-quark decay process.

Related

  1. Next-to-leading order QCD corrections to fully charm tetraquark hadronic decay
    Yefan Wang, Fengxiang Zhao, Ruilin Zhu
    arXivPreprintCC BY-NC-ND 4.0Full textHigh-energy & particle physicsarXiv
  2. Quantum Fourier integration of decay rates at next-to-leading order
    David F. Rentería-Estrada
    arXivPreprintCC BY 4.0Full textHigh-energy & particle physicsQuantum physics & quantum informationarXiv
  3. The renormalization of the shell-model neutrinoless double-beta decay operator starting from effective field theory at next-to-next-to-leading order
    S. L. Lyu, U. Carusone, G. De Gregorio +2
    arXivPreprintCC BY 4.0Full textHigh-energy & particle physicsNuclear physicsarXiv
  4. Thermodynamics of two-flavor isospin-asymmetric superfluid quark matter at next-to-leading order
    Tim Rehberg-Juditzky, Andreas Geißel, Jens Braun
    arXivPreprintarXiv licenceFull textHigh-energy & particle physicsarXiv
  5. First next-to-next-to-leading-order extraction of fragmentation functions for Lambda hyperons
    Valerio Bertone, Alessia Bongallino, Amedeo Chiefa +2
    arXivPreprintarXiv licenceFull textHigh-energy & particle physicsNuclear physicsarXiv

Cite

BibTeXRIS
BibTeX
@article{chen2026topquark,
  title = {{Top-quark decay at next-to-next-to-next-to-leading order in QCD}},
  author = {Long Chen and Xiang Chen and Xin Guan and Yan-Qing Ma},
  journal = {Physical review. D/Physical review. D.},
  year = {2026},
  month = jul,
  doi = {10.1103/dvlc-58hx},
  url = {https://doi.org/10.1103/dvlc-58hx},
  note = {CC BY},
}
RIS
TY  - JOUR
TI  - Top-quark decay at next-to-next-to-next-to-leading order in QCD
AU  - Long Chen
AU  - Xiang Chen
AU  - Xin Guan
AU  - Yan-Qing Ma
PY  - 2026
DA  - 2026/07/14
JO  - Physical review. D/Physical review. D.
DO  - 10.1103/dvlc-58hx
UR  - https://doi.org/10.1103/dvlc-58hx
AB  - We present the first complete QCD corrections to the inclusive decay width Γ t , the W -helicity fractions f L , R , 0 and semi-inclusive distributions for the top-quark decay process t → b + W + + X QCD at next-to-next-to-next-to-leading order (NNNLO) in the strong coupling constant α s . In particular, the pure NNNLO QCD correction decreases Γ t by about 0.8% relative to the previous next-to-next-to-leading order (NNLO) result at the scale of the top-quark pole mass, exceeding the uncertainty estimated by the conventional scale-variation prescription. After taking into account errors from various sources, we get Γ t = 1.314 8 − 0.005 + 0.003 × | V t b | 2 + 0.027 ( m t − 172.69 ) GeV , whose uncertainty meets the request of future colliders. On the other hand, the NNNLO QCD effects on f L , R , 0 are found to be much smaller, at the level of one one per mille for the dominant f 0 , making them precision observables for the top-quark decay process.
SN  - 2470-0010
SN  - 2470-0029
SN  - 2470-0037
ER  -