scholarly journals Bottom quark mass and |Vcb| matrix element from and Γs1(b → clνl) in the next-to-next-to-leading order

1999 ◽  
Vol 549 (1-2) ◽  
pp. 217-241 ◽  
Author(s):  
A.A. Penin ◽  
A.A. Pivovarov
1999 ◽  
Vol 471 (2-3) ◽  
pp. 233-243 ◽  
Author(s):  
M. Beneke ◽  
A. Signer

2021 ◽  
Vol 2021 (5) ◽  
Author(s):  
Roberto Mondini ◽  
Ciaran Williams

Abstract We present a next-to-next-to-leading order (NNLO) QCD calculation of the bottom-induced contributions to the production of a Higgs boson plus a jet, i.e. the process pp → H + j to $$ \mathcal{O}\left({y}_b^2{\alpha}_s^3\right) $$ O y b 2 α s 3 . We work in the five-flavor scheme (5FS) in which the bottom quark mass is retained only in the coupling to the Higgs boson. Our calculation uses N-jettiness slicing to regulate infrared divergences, allowing for fully-differential predictions for collider observables. After extensively validating the methodology, we present results for the 13 TeV LHC. Our NNLO predictions show a marked improvement in the overall renormalization and factorization scale dependence, the latter of which proves to be particularly troublesome for 5FS calculations at lower orders. In addition, using the same methodology we present a NNLO computation of $$ b\overline{b} $$ b b ¯ → H. Our results are implemented into MCFM.


2021 ◽  
Vol 2021 (4) ◽  
Author(s):  
Marco Niggetiedt

Abstract We follow up on our discussion of the exact quark-mass dependence of the Higgs-gluon form factor at three loops in QCD [1] and turn our attention to the closely related Higgs-photon form factor. Similarly to our previous work, we intend to examine the form factor for the decay of a Higgs-boson with variable mass into two photons at the three-loop level in QCD. The set of master integrals is known numerically due to prior work on the Higgs-gluon form factor and is exploited to obtain expansions around the threshold as well as in the high-energy limit. Our results may be utilised to derive the photonic decay rate of the Higgs-boson through next-to-next-to-leading order.


2012 ◽  
Vol 2012 (11) ◽  
Author(s):  
John M. Campbell ◽  
Walter T. Giele ◽  
Ciaran Williams

2016 ◽  
Author(s):  
Andreas Maier ◽  
Martin Beneke ◽  
Jan Piclum ◽  
Thomas Rauh
Keyword(s):  

2000 ◽  
Vol 483 (1-3) ◽  
pp. 94-98 ◽  
Author(s):  
A.H. Hoang ◽  
A.V. Manohar
Keyword(s):  

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