Slepton pair production in association with a jet: NLO-QCD corrections and parton-shower effects. (English) Zbl 1388.81012

Jäger, Barbara; von Manteuffel, Andreas; Thier, Stephan

J. High Energy Phys. 2015, No. 2, Paper No. 41, 17 p. (2015).

Summary: We present a calculation of the next-to-leading order QCD corrections to slepton pair production in association with a jet at the LHC together with their implementation in the POWHEG BOX. For the simulation of parton-shower effects and the decays of the sleptons we employ the multi-purpose Monte-Carlo program PYTHIA. We discuss the impact of next-to-leading order QCD corrections on experimentally accessible distributions and illustrate how the parton shower can modify observables that are sensitive to QCD radiation effects. Having full control on the hard jet in the process, we provide precise predictions also for monojet analyses.

MSC:

81-08

Computational methods for problems pertaining to quantum theory

Keywords:

Monte Carlo simulations; NLO computations

Software:

FF; MadGraph; HERWIG 5.1; FORM; GiNaC; MC@NLO; Fermat; FeynArts; FormCalc; POWHEG BOX; Reduze; FastJet; PROSPINO; HELAS; PYTHIA8

References:

[1]	ATLAS collaboration, Observation of a new particle in the search for the standard model Higgs boson with the ATLAS detector at the LHC, Phys. Lett., B 716, 1, (2012)
[2]	CMS collaboration, Observation of a new boson at a mass of 125 gev with the CMS experiment at the LHC, Phys. Lett., B 716, 30, (2012)
[3]	ATLAS physics results webpage, https://twiki.cern.ch/twiki/bin/view/AtlasPublic.
[4]	CMS physics results webpage, https://twiki.cern.ch/twiki/bin/view/CMSPublic/PhysicsResults.
[5]	ATLAS collaboration, Search for direct slepton and gaugino production in final states with two leptons and missing transverse momentum with the ATLAS detector in pp collisions at \( \sqrt{s}=7 \) TeV, Phys. Lett., B 718, 879, (2013)
[6]	ATLAS collaboration, Search for direct production of charginos and neutralinos in events with three leptons and missing transverse momentum in \( \sqrt{s}=7 \) TeV pp collisions with the ATLAS detector, Phys. Lett., B 718, 841, (2013)
[7]	CMS collaboration, Search for electroweak production of charginos and neutralinos using leptonic final states in pp collisions at \( \sqrt{s}=7 \) TeV, JHEP, 11, 147, (2012)
[8]	H.-U. Martyn and G.A. Blair, Determination of sparticle masses and SUSY parameters, hep-ph/9910416 [INSPIRE].
[9]	Freitas, A.; Manteuffel, A.; Zerwas, PM, Slepton production at e\^{}{+}e\^{}{−} and e\^{}{−}e\^{}{−} linear colliders, Eur. Phys. J., C 34, 487, (2004)
[10]	Freitas, A.; Manteuffel, A.; Zerwas, PM, Slepton production at e\^{}{+}e\^{}{−} and e\^{}{−}e\^{}{−} linear colliders: addendum, Eur. Phys. J., C 40, 435, (2005)
[11]	A. Freitas, Feasibility of slepton precision measurements at a muon collider, arXiv:1107.3853 [INSPIRE].
[12]	Baer, H.; Harris, BW; Reno, MH, Next-to-leading order slepton pair production at hadron colliders, Phys. Rev., D 57, 5871, (1998)
[13]	W. Beenakker et al., The production of charginos/neutralinos and sleptons at hadron colliders, Phys. Rev. Lett.83 (1999) 3780 [Erratum ibid.100 (2008) 029901] [hep-ph/9906298] [INSPIRE].
[14]	W. Beenakker, R. Hopker and M. Spira, PROSPINO: a program for the production of supersymmetric particles in next-to-leading order QCD, hep-ph/9611232 [INSPIRE].
[15]	Bozzi, G.; Fuks, B.; Klasen, M., Transverse-momentum resummation for slepton-pair production at the CERN LHC, Phys. Rev., D 74, 015001, (2006)
[16]	Bozzi, G.; Fuks, B.; Klasen, M., Threshold resummation for slepton-pair production at hadron colliders, Nucl. Phys., B 777, 157, (2007)
[17]	Bozzi, G.; Fuks, B.; Klasen, M., Joint resummation for slepton pair production at hadron colliders, Nucl. Phys., B 794, 46, (2008)
[18]	Broggio, A.; Neubert, M.; Vernazza, L., Soft-gluon resummation for slepton-pair production at hadron colliders, JHEP, 05, 151, (2012)
[19]	I. Fridman-Rojas and P. Richardson, Next-to-leading order simulation of slepton pair production, arXiv:1208.0279 [INSPIRE].
[20]	Jager, B.; Manteuffel, A.; Thier, S., Slepton pair production in the POWHEG BOX, JHEP, 10, 130, (2012)
[21]	Marchesini, G.; etal., HERWIG: a Monte Carlo event generator for simulating hadron emission reactions with interfering gluons. version 5.1 — April 1991, Comput. Phys. Commun., 67, 465, (1992) · Zbl 0875.65018
[22]	Corcella, G.; etal., HERWIG 6: an event generator for hadron emission reactions with interfering gluons (including supersymmetric processes), JHEP, 01, 010, (2001)
[23]	Sjöstrand, T.; Mrenna, S.; Skands, PZ, PYTHIA 6.4 physics and manual, JHEP, 05, 026, (2006) · Zbl 1368.81015
[24]	Nason, P., A new method for combining NLO QCD with shower Monte Carlo algorithms, JHEP, 11, 040, (2004)
[25]	Frixione, S.; Nason, P.; Oleari, C., Matching NLO QCD computations with parton shower simulations: the POWHEG method, JHEP, 11, 070, (2007)
[26]	Alioli, S.; Nason, P.; Oleari, C.; Re, E., A general framework for implementing NLO calculations in shower Monte Carlo programs: the POWHEG BOX, JHEP, 06, 043, (2010) · Zbl 1290.81155
[27]	H. Murayama, I. Watanabe and K. Hagiwara, HELAS: HELicity amplitude subroutines for Feynman diagram evaluations, KEK-91-11, Japan (1992) [INSPIRE].
[28]	Stelzer, T.; Long, WF, Automatic generation of tree level helicity amplitudes, Comput. Phys. Commun., 81, 357, (1994)
[29]	Alwall, J.; etal., Madgraph/madevent v4: the new web generation, JHEP, 09, 028, (2007)
[30]	Campbell, JM; etal., NLO Higgs boson production plus one and two jets using the POWHEG BOX, madgraph4 and MCFM, JHEP, 07, 092, (2012)
[31]	Gavin, R.; etal., Matching squark pair production at NLO with parton showers, JHEP, 10, 187, (2013)
[32]	Cho, G-C; etal., Weak boson fusion production of supersymmetric particles at the CERN LHC, Phys. Rev., D 73, 054002, (2006)
[33]	Frixione, S.; Kunszt, Z.; Signer, A., Three jet cross-sections to next-to-leading order, Nucl. Phys., B 467, 399, (1996)
[34]	Hollik, W.; Stöckinger, D., Regularization and supersymmetry restoring counterterms in supersymmetric QCD, Eur. Phys. J., C 20, 105, (2001)
[35]	Collins, JC; Wilczek, F.; Zee, A., Low-energy manifestations of heavy particles: application to the neutral current, Phys. Rev., D 18, 242, (1978)
[36]	P. Nason, S. Dawson and R.K. Ellis, The one particle inclusive differential cross-section for heavy quark production in hadronic collisions, Nucl. Phys.B 327 (1989) 49 [Erratum ibid.B 335 (1990) 260] [INSPIRE].
[37]	Berge, S.; Hollik, W.; Mosle, WM; Wackeroth, D., SUSY QCD one-loop effects in (un)polarized top-pair production at hadron colliders, Phys. Rev., D 76, 034016, (2007)
[38]	Adler, SL, Axial vector vertex in spinor electrodynamics, Phys. Rev., 177, 2426, (1969)
[39]	Bell, JS; Jackiw, R., A PCAC puzzle: π\^{}{0} → γγ in the σ-model, Nuovo Cim., A 60, 47, (1969)
[40]	Kreimer, D., The γ_{5} problem and anomalies: a Clifford algebra approach, Phys. Lett., B 237, 59, (1990)
[41]	Korner, JG; Kreimer, D.; Schilcher, K., A practicable γ_{5} scheme in dimensional regularization, Z. Phys., C 54, 503, (1992)
[42]	Larin, SA, The renormalization of the axial anomaly in dimensional regularization, Phys. Lett., B 303, 113, (1993)
[43]	Nogueira, P., Automatic Feynman graph generation, J. Comput. Phys., 105, 279, (1993) · Zbl 0782.68091
[44]	J. Rosiek, Complete set of Feynman rules for the MSSM: erratum, hep-ph/9511250 [INSPIRE].
[45]	J.A.M. Vermaseren, New features of FORM, math-ph/0010025 [INSPIRE].
[46]	Kuipers, J.; Ueda, T.; Vermaseren, JAM; Vollinga, J., FORM version 4.0, Comput. Phys. Commun., 184, 1453, (2013) · Zbl 1317.68286
[47]	Studerus, C., Reduze-Feynman integral reduction in C++, Comput. Phys. Commun., 181, 1293, (2010) · Zbl 1219.81133
[48]	A. von Manteuffel and C. Studerus, Reduze 2 — distributed Feynman integral reduction, arXiv:1201.4330 [INSPIRE]. · Zbl 1219.81133
[49]	Bauer, C.; Frink, A.; Kreckel, R., Introduction to the ginac framework for symbolic computation within the C++ programming language, J. Symbol. Comput., 33, 1, (2002) · Zbl 1017.68163
[50]	R.H. Lewis, Computer algebra system Fermat webpage, http://www.bway.net/∼lewis.
[51]	Ellis, RK; Zanderighi, G., Scalar one-loop integrals for QCD, JHEP, 02, 002, (2008)
[52]	Oldenborgh, GJ, FF: a package to evaluate one loop Feynman diagrams, Comput. Phys. Commun., 66, 1, (1991) · Zbl 0997.65518
[53]	Hahn, T., Generating Feynman diagrams and amplitudes with feynarts 3, Comput. Phys. Commun., 140, 418, (2001) · Zbl 0994.81082
[54]	Hahn, T.; Pérez-Victoria, M., Automatized one loop calculations in four-dimensions and D-dimensions, Comput. Phys. Commun., 118, 153, (1999)
[55]	Hahn, T., A Mathematica interface for formcalc-generated code, Comput. Phys. Commun., 178, 217, (2008)
[56]	Denner, A.; Dittmaier, S., Reduction of one loop tensor five point integrals, Nucl. Phys., B 658, 175, (2003) · Zbl 1027.81517
[57]	Alioli, S.; Moch, S-O; Uwer, P., Hadronic top-quark pair-production with one jet and parton showering, JHEP, 01, 137, (2012)
[58]	Alioli, S.; Nason, P.; Oleari, C.; Re, E., Vector boson plus one jet production in POWHEG, JHEP, 01, 095, (2011) · Zbl 1214.81343
[59]	Martin, AD; Stirling, WJ; Thorne, RS; Watt, G., Parton distributions for the LHC, Eur. Phys. J., C 63, 189, (2009) · Zbl 1369.81126
[60]	M.R. Whalley, D. Bourilkov and R.C. Group, The Les Houches accord PDFs (LHAPDF) and LHAGLUE, hep-ph/0508110 [INSPIRE].
[61]	Skands, PZ; etal., SUSY LES houches accord: interfacing SUSY spectrum calculators, decay packages and event generators, JHEP, 07, 036, (2004)
[62]	Allanach, BC; etal., SUSY LES houches accord 2, Comput. Phys. Commun., 180, 8, (2009)
[63]	ATLAS collaboration, Search for direct production of charginos, neutralinos and sleptons in final states with two leptons and missing transverse momentum in pp collisions at \( \sqrt{s}=8 \) TeV with the ATLAS detector, JHEP, 05, 071, (2014)
[64]	CMS collaboration, Searches for electroweak production of charginos, neutralinos and sleptons decaying to leptons and W , Z and Higgs bosons in pp collisions at 8 TeV, Eur. Phys. J., C 74, 3036, (2014)
[65]	Cacciari, M.; Salam, GP; Soyez, G., The anti-k_{t} jet clustering algorithm, JHEP, 04, 063, (2008) · Zbl 1369.81100
[66]	Cacciari, M.; Salam, GP, Dispelling the N \^{}{3} myth for the k_{t} jet-finder, Phys. Lett., B 641, 57, (2006)
[67]	Cacciari, M.; Salam, GP; Soyez, G., Fastjet user manual, Eur. Phys. J., C 72, 1896, (2012) · Zbl 1393.81007
[68]	Gavin, R.; Trenkel, MK, SUSY QCD corrections to electroweak gauge boson production with an associated jet at the LHC, JHEP, 01, 036, (2012) · Zbl 1306.81338
[69]	Buckley, MR; Lykken, JD; Rogan, C.; Spiropulu, M., Super-razor and searches for sleptons and charginos at the LHC, Phys. Rev., D 89, 055020, (2014)
[70]	Melia, T.; Nason, P.; Rontsch, R.; Zanderighi, G., W \^{}{+}W \^{}{−}, W Z and ZZ production in the POWHEG BOX, JHEP, 11, 078, (2011)
[71]	Gunion, JF; Mrenna, S., A study of SUSY signatures at the tevatron in models with near mass degeneracy of the lightest chargino and neutralino, Phys. Rev., D 62, 015002, (2000)
[72]	Han, C.; etal., Probing light higgsinos in natural SUSY from monojet signals at the LHC, JHEP, 02, 049, (2014)
[73]	Schwaller, P.; Zurita, J., Compressed electroweakino spectra at the LHC, JHEP, 03, 060, (2014)
[74]	Baer, H.; Mustafayev, A.; Tata, X., Monojets and mono-photons from light higgsino pair production at LHC14, Phys. Rev., D 89, 055007, (2014)