Abstract
Inclusive Higgs measurements at the LHC have limited resolution on the gluon fusion loops, being unable to distinguish the long-distance contributions mediated by the top quark from possible short-distance new physics effects. Using an Effective Field Theory (EFT) approach we compare several proposed methods to lift this degeneracy, including \( t\overline{t}h \) and boosted, off-shell and double Higgs production, and perform detailed projections to the High-Luminosity LHC and a future hadron collider. In addition, we revisit off-shell Higgs production. Firstly, we point out its sensitivity to modifications of the top-Z couplings, and by means of a general analysis we show that the reach is comparable to that of tree-level processes such as \( t\overline{t}Z \) production. Implications for composite Higgs models are also discussed. Secondly, we assess the regime of validity of the EFT, performing an explicit comparison for a simple extension of the Standard Model containing one vector-like quark.
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ATLAS, CMS collaboration, Combined Measurement of the Higgs boson mass in pp collisions at \( \sqrt{s}=7 \) and 8 TeV with the ATLAS and CMS experiments, Phys. Rev. Lett. 114 (2015) 191803 [arXiv:1503.07589] [INSPIRE].
M. Carena, C. Grojean, M. Kado and V. Sharma, Status of Higgs boson physics, submitted to Rev. Part. Phys. (2016).
A. Azatov and A. Paul, Probing Higgs couplings with high p T Higgs production, JHEP 01 (2014) 014 [arXiv:1309.5273] [INSPIRE].
C. Grojean, E. Salvioni, M. Schlaffer and A. Weiler, Very boosted Higgs in gluon fusion, JHEP 05 (2014) 022 [arXiv:1312.3317] [INSPIRE].
B. Bellazzini, C. Csáki and J. Serra, Composite Higgses, Eur. Phys. J. C 74 (2014) 2766 [arXiv:1401.2457] [INSPIRE].
G. Panico and A. Wulzer, The composite Nambu-Goldstone Higgs, Lect. Notes Phys. 913 (2016) pp.1-316 [arXiv:1506.01961] [INSPIRE].
A. Falkowski, Pseudo-goldstone Higgs production via gluon fusion, Phys. Rev. D 77 (2008) 055018 [arXiv:0711.0828] [INSPIRE].
I. Low and A. Vichi, On the production of a composite Higgs boson, Phys. Rev. D 84 (2011) 045019 [arXiv:1010.2753] [INSPIRE].
A. Azatov and J. Galloway, Light custodians and Higgs physics in composite models, Phys. Rev. D 85 (2012) 055013 [arXiv:1110.5646] [INSPIRE].
C. Delaunay, C. Grojean and G. Perez, Modified Higgs physics from composite light flavors, JHEP 09 (2013) 090 [arXiv:1303.5701] [INSPIRE].
M. Montull, F. Riva, E. Salvioni and R. Torre, Higgs couplings in composite models, Phys. Rev. D 88 (2013) 095006 [arXiv:1308.0559] [INSPIRE].
ATLAS collaboration, Projections for measurements of Higgs boson cross sections, branching ratios and coupling parameters with the ATLAS detector at a HL-LHC, ATL-PHYS-PUB-2013-014 (2013).
M.L. Mangano, T. Plehn, P. Reimitz, T. Schell and H.-S. Shao, Measuring the top yukawa coupling at 100 TeV, J. Phys. G 43 (2016) 035001 [arXiv:1507.08169] [INSPIRE].
R.V. Harlander and T. Neumann, Probing the nature of the Higgs-gluon coupling, Phys. Rev. D 88 (2013) 074015 [arXiv:1308.2225] [INSPIRE].
A. Banfi, A. Martin and V. Sanz, Probing top-partners in Higgs+jets, JHEP 08 (2014) 053 [arXiv:1308.4771] [INSPIRE].
M. Buschmann, C. Englert, D. Goncalves, T. Plehn and M. Spannowsky, Resolving the Higgs-gluon coupling with jets, Phys. Rev. D 90 (2014) 013010 [arXiv:1405.7651] [INSPIRE].
M. Schlaffer, M. Spannowsky, M. Takeuchi, A. Weiler and C. Wymant, Boosted Higgs shapes, Eur. Phys. J. C 74 (2014) 3120 [arXiv:1405.4295] [INSPIRE].
U. Langenegger, M. Spira and I. Strebel, Testing the Higgs boson coupling to gluons, arXiv:1507.01373 [INSPIRE].
M. Grazzini, A. Ilnicka, M. Spira and M. Wiesemann, BSM effects on the Higgs transverse-momentum spectrum in an EFT approach, PoS(EPS-HEP 2015)144 [arXiv:1511.08059] [INSPIRE].
U. Langenegger, M. Spira, A. Starodumov and P. Trueb, SM and MSSM Higgs Boson production: spectra at large transverse Momentum, JHEP 06 (2006) 035 [hep-ph/0604156] [INSPIRE].
C. Arnesen, I.Z. Rothstein and J. Zupan, Smoking guns for on-shell new physics at the LHC, Phys. Rev. Lett. 103 (2009) 151801 [arXiv:0809.1429] [INSPIRE].
E. Bagnaschi, G. Degrassi, P. Slavich and A. Vicini, Higgs production via gluon fusion in the POWHEG approach in the SM and in the MSSM, JHEP 02 (2012) 088 [arXiv:1111.2854] [INSPIRE].
G. Cacciapaglia, A. Deandrea, G. Drieu La Rochelle and J.-B. Flament, Higgs couplings: disentangling New Physics with off-shell measurements, Phys. Rev. Lett. 113 (2014) 201802 [arXiv:1406.1757] [INSPIRE].
A. Azatov, C. Grojean, A. Paul and E. Salvioni, Taming the off-shell Higgs boson, Zh. Eksp. Teor. Fiz. 147 (2015) 410 [arXiv:1406.6338] [INSPIRE].
M. Buschmann, D. Goncalves, S. Kuttimalai, M. Schonherr, F. Krauss and T. Plehn, Mass effects in the Higgs-gluon coupling: boosted vs. off-shell production, JHEP 02 (2015) 038 [arXiv:1410.5806] [INSPIRE].
F. Goertz, A. Papaefstathiou, L.L. Yang and J. Zurita, Higgs boson pair production in the D = 6 extension of the SM, JHEP 04 (2015) 167 [arXiv:1410.3471] [INSPIRE].
A. Azatov, R. Contino, G. Panico and M. Son, Effective field theory analysis of double Higgs boson production via gluon fusion, Phys. Rev. D 92 (2015) 035001 [arXiv:1502.00539] [INSPIRE].
R. Röntsch and M. Schulze, Constraining couplings of top quarks to the Z boson in \( t\overline{t} \) + Z production at the LHC, JHEP 07 (2014) 091 [Erratum ibid. 09 (2015) 132] [arXiv:1404.1005] [INSPIRE].
J.A. Dror, M. Farina, E. Salvioni and J. Serra, Strong tW scattering at the LHC, JHEP 01 (2016) 071 [arXiv:1511.03674] [INSPIRE].
O. Bessidskaia Bylund, F. Maltoni, I. Tsinikos, E. Vryonidou and C. Zhang, Probing top quark neutral couplings in the Standard Model Effective Field Theory at NLO in QCD, JHEP 05 (2016) 052 [arXiv:1601.08193] [INSPIRE].
C. Englert, R. Rosenfeld, M. Spannowsky and A. Tonero, New physics and signal-background interference in associated pp → HZ production, Europhys. Lett. 114 (2016) 31001 [arXiv:1603.05304] [INSPIRE].
R. Contino, A. Falkowski, F. Goertz, C. Grojean and F. Riva, On the validity of the effective field theory approach to SM precision tests, JHEP 07 (2016) 144 [arXiv:1604.06444] [INSPIRE].
G.F. Giudice, C. Grojean, A. Pomarol and R. Rattazzi, The strongly-interacting light Higgs, JHEP 06 (2007) 045 [hep-ph/0703164] [INSPIRE].
R. Contino, M. Ghezzi, C. Grojean, M. Muhlleitner and M. Spira, Effective Lagrangian for a light Higgs-like scalar, JHEP 07 (2013) 035 [arXiv:1303.3876] [INSPIRE].
M.A. Shifman, A.I. Vainshtein, M.B. Voloshin and V.I. Zakharov, Low-energy theorems for Higgs boson couplings to photons, Sov. J. Nucl. Phys. 30 (1979) 711 [Yad. Fiz. 30 (1979) 1368] [INSPIRE].
J.R. Ellis, M.K. Gaillard and D.V. Nanopoulos, A phenomenological profile of the Higgs boson, Nucl. Phys. B 106 (1976) 292 [INSPIRE].
C. Degrande, J.M. Gerard, C. Grojean, F. Maltoni and G. Servant, Probing top-Higgs non-standard interactions at the LHC, JHEP 07 (2012) 036 [Erratum ibid. 03 (2013) 032] [arXiv:1205.1065] [INSPIRE].
C.O. Dib, R. Rosenfeld and A. Zerwekh, Double Higgs production and quadratic divergence cancellation in little Higgs models with T parity, JHEP 05 (2006) 074 [hep-ph/0509179] [INSPIRE].
R. Grober and M. Muhlleitner, Composite Higgs boson pair production at the LHC, JHEP 06 (2011) 020 [arXiv:1012.1562] [INSPIRE].
R. Contino, M. Ghezzi, M. Moretti, G. Panico, F. Piccinini and A. Wulzer, Anomalous couplings in double Higgs production, JHEP 08 (2012) 154 [arXiv:1205.5444] [INSPIRE].
M. Gillioz, R. Grober, C. Grojean, M. Muhlleitner and E. Salvioni, Higgs low-energy theorem (and its corrections) in composite models, JHEP 10 (2012) 004 [arXiv:1206.7120] [INSPIRE].
R.V. Harlander, S. Liebler and T. Zirke, Higgs strahlung at the Large Hadron Collider in the 2-Higgs-doublet model, JHEP 02 (2014) 023 [arXiv:1307.8122] [INSPIRE].
C. Englert, M. McCullough and M. Spannowsky, Gluon-initiated associated production boosts Higgs physics, Phys. Rev. D 89 (2014) 013013 [arXiv:1310.4828] [INSPIRE].
C. Englert, F. Krauss, M. Spannowsky and J. Thompson, Di-Higgs phenomenology in tthh: the forgotten channel, Phys. Lett. B 743 (2015) 93 [arXiv:1409.8074] [INSPIRE].
B. Lillie, J. Shu and T.M.P. Tait, Top compositeness at the Tevatron and LHC, JHEP 04 (2008) 087 [arXiv:0712.3057] [INSPIRE].
A. Pomarol and J. Serra, Top quark compositeness: feasibility and implications, Phys. Rev. D 78 (2008) 074026 [arXiv:0806.3247] [INSPIRE].
Q.-H. Cao, S.-L. Chen and Y. Liu, Probing Higgs width and top quark Yukawa coupling from \( t\overline{t}H \) and \( t\overline{t}t\overline{t} \) productions, arXiv:1602.01934 [INSPIRE].
S. Biswas, E. Gabrielli and B. Mele, Single top and Higgs associated production as a probe of the Htt coupling sign at the LHC, JHEP 01 (2013) 088 [arXiv:1211.0499] [INSPIRE].
M. Farina, C. Grojean, F. Maltoni, E. Salvioni and A. Thamm, Lifting degeneracies in Higgs couplings using single top production in association with a Higgs boson, JHEP 05 (2013) 022 [arXiv:1211.3736] [INSPIRE].
D.B. Kaplan, Flavor at SSC energies: a New mechanism for dynamically generated fermion masses, Nucl. Phys. B 365 (1991) 259 [INSPIRE].
C. Bernardo et al., Studying the W tb vertex structure using recent LHC results, Phys. Rev. D 90 (2014) 113007 [arXiv:1408.7063] [INSPIRE].
F. Larios, M.A. Perez and C.P. Yuan, Analysis of tbW and ttZ couplings from CLEO and LEP/SLC data, Phys. Lett. B 457 (1999) 334 [hep-ph/9903394] [INSPIRE].
J. de Blas, M. Chala and J. Santiago, Renormalization group constraints on new top interactions from electroweak precision data, JHEP 09 (2015) 189 [arXiv:1507.00757] [INSPIRE].
J. Brod, A. Greljo, E. Stamou and P. Uttayarat, Probing anomalous \( t\overline{t}Z \) interactions with rare meson decays, JHEP 02 (2015) 141 [arXiv:1408.0792] [INSPIRE].
J.M. Campbell, R.K. Ellis and C. Williams, Bounding the Higgs width at the LHC using full analytic results for gg → e − e + μ − μ +, JHEP 04 (2014) 060 [arXiv:1311.3589] [INSPIRE].
J.M. Campbell and R.K. Ellis, MCFM for the Tevatron and the LHC, Nucl. Phys. Proc. Suppl. 205-206 (2010) 10 [arXiv:1007.3492] [INSPIRE].
A. De Simone, O. Matsedonskyi, R. Rattazzi and A. Wulzer, A first top partner hunter’s guide, JHEP 04 (2013) 004 [arXiv:1211.5663] [INSPIRE].
P. Janot, Top-quark electroweak couplings at the FCC-ee, JHEP 04 (2015) 182 [arXiv:1503.01325] [INSPIRE].
P.H. Khiem, E. Kou, Y. Kurihara and F. Le Diberder, Probing new physics using top quark polarization in the \( {e}^{+}{e}^{-}\to t\overline{t} \) process at future Linear Colliders, arXiv:1503.04247 [INSPIRE].
M.S. Amjad et al., A precise characterisation of the top quark electro-weak vertices at the ILC, Eur. Phys. J. C 75 (2015) 512 [arXiv:1505.06020] [INSPIRE].
C. Grojean, O. Matsedonskyi and G. Panico, Light top partners and precision physics, JHEP 10 (2013) 160 [arXiv:1306.4655] [INSPIRE].
K. Agashe, R. Contino, L. Da Rold and A. Pomarol, A custodial symmetry for \( Zb\overline{b} \), Phys. Lett. B 641 (2006) 62 [hep-ph/0605341] [INSPIRE].
M. Dührssen, K. Jakobs, J.J. van der Bij and P. Marquard, The process gg → W W as a background to the Higgs signal at the LHC, JHEP 05 (2005) 064 [hep-ph/0504006] [INSPIRE].
T. Hahn, Generating Feynman diagrams and amplitudes with FeynArts 3, Comput. Phys. Commun. 140 (2001) 418 [hep-ph/0012260] [INSPIRE].
T. Hahn and M. Pérez-Victoria, Automatized one loop calculations in four-dimensions and D-dimensions, Comput. Phys. Commun. 118 (1999) 153 [hep-ph/9807565] [INSPIRE].
F. Maltoni, E. Vryonidou and C. Zhang, Higgs production in association with a top-antitop pair in the standard model effective field theory at NLO in QCD, arXiv:1607.05330 [INSPIRE].
R.D. Ball, M. Bonvini, S. Forte, S. Marzani and G. Ridolfi, Higgs production in gluon fusion beyond NNLO, Nucl. Phys. B 874 (2013) 746 [arXiv:1303.3590] [INSPIRE].
K. Melnikov and M. Dowling, Production of two Z-bosons in gluon fusion in the heavy top quark approximation, Phys. Lett. B 744 (2015) 43 [arXiv:1503.01274] [INSPIRE].
J.M. Campbell, R.K. Ellis, M. Czakon and S. Kirchner, Two loop correction to interference in gg → ZZ, JHEP 08 (2016) 011 [arXiv:1605.01380] [INSPIRE].
F. Caola, M. Dowling, K. Melnikov, R. Röntsch and L. Tancredi, QCD corrections to vector boson pair production in gluon fusion including interference effects with off-shell Higgs at the LHC, JHEP 07 (2016) 087 [arXiv:1605.04610] [INSPIRE].
M. Bonvini, F. Caola, S. Forte, K. Melnikov and G. Ridolfi, Signal-background interference effects for gg → H → W + W − beyond leading order, Phys. Rev. D 88 (2013) 034032 [arXiv:1304.3053] [INSPIRE].
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] [INSPIRE].
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ArXiv ePrint: 1608.00977
On leave of absence from: ICREA, E-08010 Barcelona, Spain and IFAE, Barcelona Institute of Science and Technology (BIST) Campus UAB, E-08193 Bellaterra, Spain (Christophe Grojean).
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Azatov, A., Grojean, C., Paul, A. et al. Resolving gluon fusion loops at current and future hadron colliders. J. High Energ. Phys. 2016, 123 (2016). https://doi.org/10.1007/JHEP09(2016)123
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DOI: https://doi.org/10.1007/JHEP09(2016)123