Abstract
We present a study of \( \ell \nu b\bar{b} \) and \( {\ell^{+} }{\ell^{-} }b\bar{b} \) production at hadron colliders. Our results, accurate to the next-to-leading order in QCD, are based on automatic matrix-element calculations performed by MadLoop and MadFKS, and are given at both the parton level, and after the matching with the Herwig event generator, achieved with aMC@NLO. We retain the complete dependence on the bottom-quark mass, and include exactly all spin correlations of final-state leptons. We discuss the cases of several observables at the LHC which highlight the importance of accurate simulations.
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CDF collaboration, F. Abe et al., Observation of top quark production in \( \bar{p}p \) collisions, Phys. Rev. Lett. 74 (1995) 2626 [hep-ex/9503002] [SPIRES].
D0 collaboration, S. Abachi et al., Observation of the top quark, Phys. Rev. Lett. 74 (1995) 2632 [hep-ex/9503003] [SPIRES].
D0 collaboration, V.M. Abazov et al., Observation of single top-quark production, Phys. Rev. Lett. 103 (2009) 092001 [arXiv:0903.0850] [SPIRES].
CDF collaboration, T. Aaltonen et al., First observation of electroweak single top quark production, Phys. Rev. Lett. 103 (2009) 092002 [arXiv:0903.0885] [SPIRES].
CDF and D0 collaboration, Combined CDF and D0 upper limits on Standard Model Higgs-boson production with up to 6.7 fb−1 of data, arXiv:1007.4587 [SPIRES].
CMS collaboration, G.L. Bayatian et al., CMS technical design report, volume II: physics performance, J. Phys. G 34 (2007) 995 [SPIRES].
ATLAS collaboration, G. Aad et al., Expected performance of the ATLAS experiment — detector, trigger and physics, arXiv:0901.0512 [SPIRES].
P.B. Arnold and M.H. Reno, The complete computation of high p T W and Z production in 2nd order QCD, Nucl. Phys. B 319 (1989) 37 [Erratum ibid. B 330 (1990) 284] [SPIRES].
J.M. Campbell and R.K. Ellis, Next-to-leading order corrections to W + 2 jet and Z + 2 jet production at hadron colliders, Phys. Rev. D 65 (2002) 113007 [hep-ph/0202176] [SPIRES].
C.F. Berger et al., Next-to-leading order QCD predictions for W + 3-jet distributions at hadron colliders, Phys. Rev. D 80 (2009) 074036 [arXiv:0907.1984] [SPIRES].
C.F. Berger et al., Precise predictions for W + 3 jet production at hadron colliders, Phys. Rev. Lett. 102 (2009) 222001 [arXiv:0902.2760] [SPIRES].
K. Melnikov and G. Zanderighi, W + 3 jet production at the LHC as a signal or background, Phys. Rev. D 81 (2010) 074025 [arXiv:0910.3671] [SPIRES].
C.F. Berger et al., Precise predictions for W + 4 jet production at the Large Hadron Collider, Phys. Rev. Lett. 106 (2011) 092001 [arXiv:1009.2338] [SPIRES].
R.K. Ellis, G. Martinelli and R. Petronzio, Lepton pair production at large transverse momentum in second order QCD, Nucl. Phys. B 211 (1983) 106 [SPIRES].
C.F. Berger et al., Next-to-leading order QCD predictions for Z/γ * +3-jet distributions at the Tevatron, Phys. Rev. D 82 (2010) 074002 [arXiv:1004.1659] [SPIRES].
R.K. Ellis and S. Veseli, Strong radiative corrections to \( Wb\bar{b} \) production in \( p\bar{p} \) collisions, Phys. Rev. D 60 (1999) 011501 [hep-ph/9810489] [SPIRES].
J.M. Campbell and R.K. Ellis, Radiative corrections to \( Zb\bar{b} \) production, Phys. Rev. D 62 (2000) 114012 [hep-ph/0006304] [SPIRES].
F. Febres Cordero, L. Reina and D. Wackeroth, NLO QCD corrections to W boson production with a massive b-quark jet pair at the Tevatron \( p\bar{p} \) collider, Phys. Rev. D 74 (2006) 034007 [hep-ph/0606102] [SPIRES].
F. Febres Cordero, L. Reina and D. Wackeroth, NLO QCD corrections to \( Zb\bar{b} \) production with massive bottom quarks at the Fermilab Tevatron, Phys. Rev. D 78 (2008) 074014 [arXiv:0806.0808] [SPIRES].
F. Febres Cordero, L. Reina and D. Wackeroth, W- and Z-boson production with a massive bottom-quark pair at the Large Hadron Collider, Phys. Rev. D 80 (2009) 034015 [arXiv:0906.1923] [SPIRES].
S. Badger, J.M. Campbell and R.K. Ellis, QCD corrections to the hadronic production of a heavy quark pair and a W-boson including decay correlations, JHEP 03 (2011) 027 [arXiv:1011.6647] [SPIRES].
J.M. Campbell et al., Associated production of a W boson and one b jet, Phys. Rev. D 79 (2009) 034023 [arXiv:0809.3003] [SPIRES].
J.M. Campbell, R.K. Ellis, F. Maltoni and S. Willenbrock, Associated production of a Z boson and a single heavy quark jet, Phys. Rev. D 69 (2004) 074021 [hep-ph/0312024] [SPIRES].
J.M. Campbell, R.K. Ellis, F. Maltoni and S. Willenbrock, Production of a W boson and two jets with one b-quark tag, Phys. Rev. D 75 (2007) 054015 [hep-ph/0611348] [SPIRES].
J.M. Campbell, R.K. Ellis, F. Maltoni and S. Willenbrock, Production of a Z boson and two jets with one heavy-quark tag, Phys. Rev. D 73 (2006) 054007 [Erratum ibid. D 77 (2008) 019903] [hep-ph/0510362] [SPIRES].
CDF collaboration, D. Acosta et al., Study of the heavy flavor content of jets produced in association with W bosons in \( p\bar{p} \) collisions at \( \sqrt {s} = 1.8 \) TeV, Phys. Rev. D 65 (2002) 052007 [hep-ex/0109012] [SPIRES].
CDF collaboration, T. Aaltonen et al., Measurement of cross sections for b jet production in events with a Z boson in \( p\bar{p} \) collisions at \( \sqrt {s} = 1.96 \) TeV, Phys. Rev. D 79 (2009) 052008 [arXiv:0812.4458] [SPIRES].
CDF collaboration, T. Aaltonen et al., First measurement of the b-jet cross section in events with a W Boson in \( p\bar{p} \) collisions at \( \sqrt {s} = 1.96 \) TeV, Phys. Rev. Lett. 104 (2010) 131801 [arXiv:0909.1505] [SPIRES].
D0 collaboration, V.M. Abazov et al., A measurement of the ratio of inclusive cross sections \( {{{\sigma \left( {p\bar{p} \to Z + b\;{\text{jet}}} \right)}} \left/ {{\sigma \left( {p\bar{p} \to Z + {\text{jet}}} \right)}} \right.} \) at \( \sqrt {s} = 1.96 \) TeV, Phys. Rev. D 83 (2011) 031105 [arXiv:1010.6203] [SPIRES].
CMS collaboration, V. Ciulli et al., W/Z + jets results from CMS, CMS report, CMS-CR-2011-073, CERN, Geneva Switzerland (2011).
ATLAS collaboration, Measurement of the production cross section for W-bosons in association with jets in collisions using 33 pb−1 at \( \sqrt {s} = 7 \) TeV with the ATLAS detector, ATLAS note, ATLAS-CONF-2011-060, CERN, Geneva Switzerland (2011).
S. Frixione and B.R. Webber, Matching NLO QCD computations and parton shower simulations, JHEP 06 (2002) 029 [hep-ph/0204244] [SPIRES].
R. Frederix et al., Scalar and pseudoscalar Higgs production in association with a top-antitop pair, Phys. Lett. B 701 (2011) 427 [arXiv:1104.5613] [SPIRES].
V. Hirschi et al., Automation of one-loop QCD corrections, JHEP 05 (2011) 044 [arXiv:1103.0621] [SPIRES].
G. Ossola, C.G. Papadopoulos and R. Pittau, Reducing full one-loop amplitudes to scalar integrals at the integrand level, Nucl. Phys. B 763 (2007) 147 [hep-ph/0609007] [SPIRES].
G. Ossola, C.G. Papadopoulos and R. Pittau, CutTools: a program implementing the OPP reduction method to compute one-loop amplitudes, JHEP 03 (2008) 042 [arXiv:0711.3596] [SPIRES].
S. Frixione, Z. Kunszt and A. Signer, Three jet cross-sections to next-to-leading order, Nucl. Phys. B 467 (1996) 399 [hep-ph/9512328] [SPIRES].
R. Frederix, S. Frixione, F. Maltoni and T. Stelzer, Automation of next-to-leading order computations in QCD: the FKS subtraction, JHEP 10 (2009) 003 [arXiv:0908.4272] [SPIRES].
C. Oleari and L. Reina, \( Wb\bar{b} \) production in POWHEG, arXiv:1105.4488 [SPIRES].
S. Alioli, P. Nason, C. Oleari and E. Re, A general framework for implementing NLO calculations in shower Monte Carlo programs: the POWHEG BOX , JHEP 06 (2010) 043 [arXiv:1002.2581] [SPIRES].
A.D. Martin, W.J. Stirling, R.S. Thorne and G. Watt, Parton distributions for the LHC, Eur. Phys. J. C 63 (2009) 189 [arXiv:0901.0002] [SPIRES].
G. Marchesini et al., Herwig : a Monte Carlo event generator for simulating hadron emission reactions with interfering gluons. Version 5.1 — april 1991, Comput. Phys. Commun. 67 (1992) 465 [SPIRES].
G. Corcella et al., Herwig 6.5: an event generator for Hadron Emission Reactions With Interfering Gluons (including supersymmetric processes), JHEP 01 (2001) 010 [hep-ph/0011363] [SPIRES].
G. Corcella et al., Herwig 6.5 release note, hep-ph/0210213 [SPIRES].
M. Bahr et al., Herwig++ physics and manual, Eur. Phys. J. C 58 (2008) 639 [arXiv:0803.0883] [SPIRES].
T. Sjöstrand, S. Mrenna and P.Z. Skands, Pythia 6.4 physics and manual, JHEP 05 (2006) 026 [hep-ph/0603175] [SPIRES].
S. Frixione, F. Stoeckli, P. Torrielli and B.R. Webber, NLO QCD corrections in Herwig++ with MC@NLO, JHEP 01 (2011) 053 [arXiv:1010.0568] [SPIRES].
P. Torrielli and S. Frixione, Matching NLO QCD computations with Pythia using MC@NLO, JHEP 04 (2010) 110 [arXiv:1002.4293] [SPIRES].
M. Cacciari, G.P. Salam and G. Soyez, The anti-k t jet clustering algorithm, JHEP 04 (2008) 063 [arXiv:0802.1189] [SPIRES].
A. Banfi, G.P. Salam and G. Zanderighi, Infrared safe definition of jet flavor, Eur. Phys. J. C 47 (2006) 113 [hep-ph/0601139] [SPIRES].
J. Alwall et al., MadGraph/MadEvent v4: the new web generation, JHEP 09 (2007) 028 [arXiv:0706.2334] [SPIRES].
Z. Bern et al., Left-handed W bosons at the LHC, Phys. Rev. D 84 (2011) 034008 [arXiv:1103.5445] [SPIRES].
F. Maltoni, T. McElmurry and S. Willenbrock, Inclusive production of a Higgs or Z boson in association with heavy quarks, Phys. Rev. D 72 (2005) 074024 [hep-ph/0505014] [SPIRES].
J.M. Butterworth, A.R. Davison, M. Rubin and G.P. Salam, Jet substructure as a new Higgs search channel at the LHC, Phys. Rev. Lett. 100 (2008) 242001 [arXiv:0802.2470] [SPIRES].
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ArXiv ePrint: 1106.6019
On leave of absence from INFN, Sezione di Genova, Genoa, Italy. (Stefano Frixione)
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Frederix, R., Frixione, S., Hirschi, V. et al. W and Z/γ ∗ boson production in association with a bottom-antibottom pair. J. High Energ. Phys. 2011, 61 (2011). https://doi.org/10.1007/JHEP09(2011)061
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DOI: https://doi.org/10.1007/JHEP09(2011)061