Higgs-boson production via bottom-quark fusion

By Fabio Maltoni, Z. Sullivan, S. Willenbrock. 2003

142 citations recorded by the source corpus.

Higgs bosons with enhanced coupling to bottom quarks are copiously produced at hadron colliders via $b\overline{b}\ensuremath{\rightarrow}h,$ where the initial b quarks reside in the proton sea. We reexamine the calculation of the next-to-leading-order cross section for this process and argue that the appropriate factorization scale for the b distribution functions is approximately ${m}_{h}/4,$ rather than ${m}_{h},$ as had been previously assumed. This greatly improves the convergence of the perturbation series, and yields a result with mild factorization-scale dependence. We also show that the leading-order calculation of $g\stackrel{\ensuremath{\rightarrow}}{g}b\overline{b}h,$ integrated over the momenta of the final-state particles, is very sensitive to the factorization and renormalization scales. For scales of order ${m}_{h}/4$ the $g\stackrel{\ensuremath{\rightarrow}}{g}b\overline{b}h$ cross section is comparable to that of $b\overline{b}\ensuremath{\rightarrow}h,$ in contrast with the order-of-magnitude discrepancy between these two calculations for the scale ${m}_{h}.$ The result we obtain improves the prospects for Higgs-boson discovery at hadron colliders for large values of $\mathrm{tan}\ensuremath{\beta}.$

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/aa1116aa5f31848db582d8966f04dfbc30039aad

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Citations in the corpus

Higgs boson production in bottom quark fusion at next-to-next-to-leading order (2003, methodology): “It is currently known up toNLO in the VFS approach [15, 16, 17, 19, 29, 30].”
b-initiated processes at the LHC: a reappraisal (2012, unknown): “This fact had been noticed previously in several studies concerning b-initiated processes, see for instance [30, 37, 68, 95, 96].”
Bottom-quark associated Higgs-boson production: reconciling the four- and five-flavour scheme approach (2011, background): “The large factorization scale μF ≈ mH/4 corresponds to the upper limit of the collinear region up to which factorization is valid [1, 2, 3].”
SusHi: A program for the calculation of Higgs production in gluon fusion and bottom-quark annihilation in the Standard Model and the MSSM (2012, unknown): “It resums terms of the form lnmb/mφ by means of b-parton distribution functions (PDFs) and was calculated up to NNLO QCD in the SM [51, 52].”
Dynamical scales for multi-TeV top-pair production at the LHC (2016, methodology): “14 in [54]), the Principle of Minimal Sensitivity [56, 58]; the Complete Renormalization Group Improvement approach [59] which provides a factorisation scale based on an alternative collinear factorisation scheme [60], extending earlier work on factorisation scale setting in Higgs production [61, 62”