Professor Dr. Michael Klasen
Professor Dr. Michael Klasen

Professur für Theoretische Physik II (Prof. Klasen)

Wilhelm-Klemm-Straße 9
48149 Münster

  • Research Areas

    • Theoretical Particle Physics
    • Philosophy of Science
  • CV

    Education

    -
    Habilitation in Theoretical Physics, University of Hamburg
    -
    Ph.D. in Physics, University of Hamburg
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    Diploma in Physics, University of Würzburg
    -
    Physics, American Literature and Music, Indiana University, Bloomington IN, USA
    -
    Physics and Philosophy, University of Würzburg

    Positions

    since
    Dean, Department of Physics, University of Münster
    since
    Professor, University of Münster
    since
    Director, Institute for Theoretical Physics, University of Münster
    -
    Vice Dean, Department of Physics, University of Münster
    -
    Executive Director, Institute for Theoretical Physics, University of Münster
    -
    Professor, University Joseph Fourier, Grenoble, France
    -
    Deputy Vice President, University Joseph Fourier, Grenoble, France
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    Associate Professor, University Joseph Fourier, Grenoble, France
    -
    Junior Research Group Leader, University of Hamburg
    -
    Postdoc, Argonne National Laboratory, Argonne IL, USA
    -
    Postdoc, DESY Hamburg

    External functions

    since
    Deputy Member in the German Committee for Astroparticle Physics
    since
    BMBF Research Focus on CMS and Theory at the LHC
    since
    Executive Board, Center for Philosophy of Science, University of Münster
    since
    Photon Conference Series, Member of the International Advisory Board
    -
    Helmholtz Alliance for Astroparticle Physics
    -
    BMBF Theory Network for Particle Physics
    -
    GDR Terascale, Member of the International Advisory Board
  • Publications

    • Guzey V., Klasen M. . ‘Diffractive dijet photoproduction in ultraperipheral collisions at the LHC in next-to-leading order QCD.’ Journal of High Energy Physics 2016, No. 4. doi: 10.1007/JHEP04(2016)158.
    • Klasen M, König F, Klein-Bösing C, Wessels JP. . ‘QCD analysis and effective temperature of direct photons in lead-lead collisions at the LHC.’ Nucl. Part. Phys. Proc. 273-275: 1509-1512. doi: 10.1016/j.nuclphysbps.2015.09.244.
    • Guzey V., Klasen M. . ‘A fresh look at factorization breaking in diffractive photoproduction of dijets at HERA at next-to-leading order QCD.’ European Physical Journal C 76, No. 8. doi: 10.1140/epjc/s10052-016-4304-5.
    • Bonciani R., Ježo T., Klasen M., Lyonnet F., Schienbein I. . ‘Electroweak top-quark pair production at the LHC with Z ′ bosons to NLO QCD in POWHEG.’ Journal of High Energy Physics 2016, No. 2: 1-34. doi: 10.1007/JHEP02(2016)141.
    • Harz J., Herrmann B., Klasen M., Kovarik K., Meinecke M., Steppeler P. . ‘Precision predictions for supersymmetric dark matter.’ Nuclear and Particle Physics Proceedings null, No. null: 262-267. doi: 10.1016/j.nuclphysbps.2015.09.036.
    • Fuks B., Klasen M., Lamprea D., Rothering M. . ‘Precision predictions for direct gaugino and slepton production at the LHC.’ Nuclear and Particle Physics Proceedings null, No. null: 479-483. doi: 10.1016/j.nuclphysbps.2015.09.070.
    • Fuks B., Klasen M., Rothering M. . ‘Soft gluon resummation for associated gluino-gaugino production at the LHC.’ Journal of High Energy Physics 2016, No. 7. doi: 10.1007/JHEP07(2016)053.
    • Klasen M., Kovařík K., Steppeler P. . ‘SUSY-QCD corrections for direct detection of neutralino dark matter and correlations with relic density.’ Physical Review D - Particles, Fields, Gravitation and Cosmology 94, No. 9. doi: 10.1103/PhysRevD.94.095002.
    • Harz J., Herrmann B., Klasen M., Kovařík K., Steppeler P. . ‘Theoretical uncertainty of the supersymmetric dark matter relic density from scheme and scale variations.’ Physical Review D - Particles, Fields, Gravitation and Cosmology 93, No. 11. doi: 10.1103/PhysRevD.93.114023.
    • Ježo T., Klasen M., König F. . ‘Prompt photon production and photon-hadron jet correlations with POWHEG.’ Journal of High Energy Physics 2016, No. 11. doi: 10.1007/JHEP11(2016)033.
    • Klasen M. . ‘Implications of the Higgs discovery on minimal dark matter.’ Nuclear and Particle Physics Proceedings null, No. null: 2339-2341. doi: 10.1016/j.nuclphysbps.2015.09.384.

    • Harz J., Herrmann B., Klasen M., Kovařík K., Meinecke M. . ‘SUSY-QCD corrections to stop annihilation into electroweak final states including Coulomb enhancement effects.’ Physical Review D - Particles, Fields, Gravitation and Cosmology 91, No. 3. doi: 10.1103/PhysRevD.91.034012.
    • Harz J., Herrmann B., Klasen M., Kovařík K. . ‘One-loop corrections to neutralino-stop coannihilation revisited.’ Physical Review D - Particles, Fields, Gravitation and Cosmology 91, No. 3. doi: 10.1103/PhysRevD.91.034028.
    • Biekötter T., Klasen M., Kramer G. . ‘Next-to-next-to-leading order contributions to inclusive jet production in deep-inelastic scattering and determination of αs.’ Physical Review D - Particles, Fields, Gravitation and Cosmology 92, No. 7. doi: 10.1103/PhysRevD.92.074037.
    • Klasen M., Pohl M., Sigl G. . ‘Indirect and direct search for dark matter.’ Progress in Particle and Nuclear Physics 85, No. null: 1-32. doi: 10.1016/j.ppnp.2015.07.001.
    • Ježo T., Klasen M., Lamprea D., Lyonnet F., Schienbein I. . ‘NLO+NLL limits on W' and Z' gauge boson masses.’Contributed to the 23rd International Workshop on Deep-Inelastic Scattering, DIS 2015, usa.
    • Harz J., Herrmann B., Klasen M., Kovařík K., Steppeler P. . ‘Precise prediction of the dark matter relic density within the MSSM.’Contributed to the 23rd European Physical Society Conference on High Energy Physics, EPS-HEP 2015, aut.

    • Klasen,Michael M.,König,Florian F.,. . ‘New information on photon fragmentation functions.’ The European Physical Journal C 74, No. 8. doi: 10.1140/epjc/s10052-014-3009-x.
    • Herrmann,Björn B.,Klasen,Michael M.,Kovařík,Karol K.,Meinecke,M. M.,Steppeler,P. P.,. . ‘One-loop corrections to gaugino (co)annihilation into quarks in the MSSM.’ Physical Review D - Particles, Fields, Gravitation and Cosmology 89, No. 11. doi: 10.1103/PhysRevD.89.114012.
    • Klasen,Michael M.,Kramer,Gustav I. G.I.,Michael,Markus M.,. . ‘Next-to-next-to-leading order contributions to jet photoproduction and determination of αs.’ Physical Review D - Particles, Fields, Gravitation and Cosmology 89, No. 7. doi: 10.1103/PhysRevD.89.074032.
    • Ježo,Tomáš T.,Klasen,Michael M.,Lyonnet,F. F.,Montanet,François F.,Schienbein,Ingo I.,Tartare,Mathieu M.,. . ‘Can new heavy gauge bosons be observed in ultra-high energy cosmic neutrino events?Physical Review D - Particles, Fields, Gravitation and Cosmology 89, No. 7. doi: 10.1103/PhysRevD.89.077702.
    • Brandt M., Klasen M., König F. . ‘Nuclear parton density modifications from low-mass lepton pair production at the LHC.’ Nuclear Physics A 927, No. null: 78-90. doi: 10.1016/j.nuclphysa.2014.03.024.
    • Klasen,Michael M.,Klein-Bösing,Christian C.,Kovařík,Karol K.,Kramer,Gustav I. G.I.,Topp,M. M.,Wessels,Johannes P. J.P.,. . ‘NLO Monte Carlo predictions for heavy-quark production at the LHC: pp collisions in ALICE.’ Journal of High Energy Physics 2014, No. 8. doi: 10.1007/JHEP08(2014)109.
    • Ježo,Tomáš T.,Klasen,Michael M.,Lamprea,David R. D.R.,Lyonnet,Florian F.,Schienbein,Ingo I.,. . ‘NLO+NLL limits on W′ and Z′ gauge boson masses in general extensions of the Standard Model.’ Journal of High Energy Physics 2014, No. 12: 1-28. doi: 10.1007/JHEP12(2014)092.
    • Esch,Sonja S.,Klasen,Michael M.,Yaguna,Carlos E. C.E.,. . ‘A minimal model for two-component dark matter.’ Journal of High Energy Physics 2014, No. 9. doi: 10.1007/JHEP09(2014)108.
    • Fuks B., Klasen M., Lamprea D.R., Rothering M. . ‘Revisiting slepton pair production at the Large Hadron Collider.’ Journal of High Energy Physics 2014, No. 1. doi: 10.1007/JHEP01(2014)168.

    • Klasen M., Brandt M. . ‘Parton densities from LHC vector boson production at small and large transverse momenta.’ Physical Review D - Particles, Fields, Gravitation and Cosmology 88, No. 5. doi: 10.1103/PhysRevD.88.054002.
    • Harz J., Herrmann B., Klasen M., Kovarik K., Le Boulc'H Q. . ‘Neutralino-stop coannihilation into electroweak gauge and Higgs bosons at one loop.’ Physical Review D - Particles, Fields, Gravitation and Cosmology 87, No. 5. doi: 10.1103/PhysRevD.87.054031.
    • Klasen M., Yaguna C.E. . ‘Warm and cold fermionic dark matter via freeze-in.’ Journal of Cosmology and Astroparticle Physics 2013, No. 11. doi: 10.1088/1475-7516/2013/11/039.
    • Esch S., Klasen M., Yaguna C.E. . ‘Detection prospects of singlet fermionic dark matter.’ Physical Review D - Particles, Fields, Gravitation and Cosmology 88, No. 7. doi: 10.1103/PhysRevD.88.075017.
    • Klasen M., Yaguna C.E., Ruiz-Alvarez J.D., Restrepo D., Zapata O. . ‘Scalar dark matter and fermion coannihilations in the radiative seesaw model.’ Journal of Cosmology and Astroparticle Physics 2013, No. 4. doi: 10.1088/1475-7516/2013/04/044.
    • Fuks B., Klasen M., Lamprea D.R., Rothering M. . ‘Precision predictions for electroweak superpartner production at hadron colliders with Resummino.’ European Physical Journal C 73, No. 7: 1-12. doi: 10.1140/epjc/s10052-013-2480-0.
    • Klasen M., Yaguna C.E., Ruiz-Alvarez J.D. . ‘Electroweak corrections to the direct detection cross section of inert Higgs dark matter.’ Physical Review D - Particles, Fields, Gravitation and Cosmology 87, No. 7. doi: 10.1103/PhysRevD.87.075025.
    • Klasen M., Klein-Bosing C., Konig F., Wessels J.P. . ‘How robust is a thermal photon interpretation of the ALICE low-pT data?Journal of High Energy Physics 2013, No. 10. doi: 10.1007/JHEP10(2013)119.

    • Fuks B, Klasen M, Lamprea DR, Rothering M. . ‘Gaugino production in proton-proton collisions at a center-of-mass energy of 8 TeV.’ JOURNAL OF HIGH ENERGY PHYSICS 2012, No. 10. doi: 10.1007/JHEP10(2012)081.
    • Klasen M, Kovarik K, Nason P, Weydert C. . ‘Associated production of charged Higgs bosons and top quarks with POWHEG.’ EUROPEAN PHYSICAL JOURNAL C 72, No. 9: -. doi: 10.1140/epjc/s10052-012-2088-9.
    • Ježo,Tomáš T.,Klasen,Michael M.,Schienbein,Ingo I.,. . ‘LHC phenomenology of general SU(2)×SU(2)×U(1) models.’ Physical Review D - Particles, Fields, Gravitation and Cosmology 86, No. 3. doi: 10.1103/PhysRevD.86.035005.
    • Jezo T, Klasen M, Schienbein I. . ‘LHC phenomenology of general SU(2)xSU(2)xU(1) models.’ PHYSICAL REVIEW D 86, No. 3: -. doi: 10.1103/PhysRevD.86.035005.
    • Fuks B, Herrmann B, Klasen M. . ‘Phenomenology of anomaly-mediated supersymmetry-breaking scenarios with nonminimal flavor violation.’ PHYSICAL REVIEW D 86, No. 1: -. doi: 10.1103/PhysRevD.86.015002.

    • Debove J, Fuks B, Klasen M. . ‘Threshold resummation for gaugino pair production at hadron colliders.’ Nuclear Physics B 842, No. 1: 51-85. doi: 10.1016/j.nuclphysb.2010.08.016.
    • Debove J, Fuks B, Klasen M. . ‘Joint resummation for gaugino pair production at hadron colliders.’ Nuclear Physics B 849, No. 1: 64-79. doi: 10.1016/j.nuclphysb.2011.03.015.
    • Herrmann B, Klasen M, Le Boulc'h Q. . ‘Impact of squark flavor violation on neutralino dark matter.’ PHYSICAL REVIEW D 84, No. 9: -. doi: 10.1103/PhysRevD.84.095007.
    • Klasen M, Kramer G. . ‘Dijet photoproduction of massless charm jets at next-to-leading order of QCD.’ EUROPEAN PHYSICAL JOURNAL C 71, No. 10: -. doi: 10.1140/epjc/s10052-011-1774-3.

    • Cornell AS, Deandrea A, Gaur N, Itoh H, Klasen M, Okada Y. . ‘Universality test of the charged higgs boson couplings at the LHC and at B factories.’ Physical Review D - Particles, Fields, Gravitation and Cosmology 81, No. 11. doi: 10.1103/PhysRevD.81.115008.
    • Debove J, Fuks B, Klasen M. . ‘Transverse-momentum resummation for gaugino-pair production at hadron colliders.’ Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 688, No. 2-3: 208-211.
    • Klasen M, Kramer G. . ‘Suppression factors in diffractive photoproduction of dijets.’ European Physical Journal C 70, No. 1: 91-106.
    • Klasen M. . ‘Factorization breaking in single-diffractive dijet production at the Tevatron.’ Nuclear Physics B - Proceedings Supplements 207-208, No. 1 C: 25-28. doi: 10.1016/j.nuclphysbps.2010.10.007.
    • Weydert C, Frixione S, Herquet M, Klasen M, Laenen E, Plehn T, Stavenga G, White CD. . ‘Charged Higgs boson production in association with a top quark in MC@NLO.’ European Physical Journal C 67, No. 3: 617-636.
    • Klasen M. . ‘NLO QCD analysis of single-diffractive dijet production at the Tevatron.’Contributed to the 18th International Workshop on Deep-Inelastic Scattering and Related Subjects, DIS 2010, Firenze, ita.
    • Klasen M. . ‘Determining SUSY particle mixing with polarized hadron beams.’Contributed to the 18th International Workshop on Deep-Inelastic Scattering and Related Subjects, DIS 2010, Firenze, ita.
    • Cacciapaglia G., Rai Choudhury S., Deandrea A., Gaur N., Klasen M. . ‘Dileptonic signatures of T-odd quarks at the LHC.’ Journal of High Energy Physics 2010, No. 3. doi: 10.1007/JHEP03(2010)059.

    • Klasen M, Kramer G. . ‘Survival probability for diffractive dijet production in pp̄ collisions from next-to-leading order calculations.’ Physical Review D - Particles, Fields, Gravitation and Cosmology 80, No. 7. doi: 10.1103/PhysRevD.80.074006.
    • Herrmann B, Klasen M, Kovařík K. . ‘Neutralino annihilation into massive quarks with supersymmetric QCD corrections.’ Physical Review D - Particles, Fields, Gravitation and Cosmology 79, No. 6. doi: 10.1103/PhysRevD.79.061701.
    • Herrmann B, Klasen M, Kovařík K. . ‘Supersymmetric QCD effects on neutralino dark matter annihilation beyond scalar or gaugino mass unification.’ Physical Review D - Particles, Fields, Gravitation and Cosmology 80, No. 8. doi: 10.1103/PhysRevD.80.085025.
    • Fuks B, Herrmann B, Klasen M. . ‘Flavour violation in gauge-mediated supersymmetry breaking models: Experimental constraints and phenomenology at the LHC.’ Nuclear Physics B 810, No. 1-2: 266-299. doi: 10.1016/j.nuclphysb.2008.11.020.
    • Klasen Michael. . Mecanique quantique relativiste. 1st Ed. Paris: Dunod.

    • Klasen M, Kramer G. . ‘Review of factorization breaking in diffractive photoproduction of dijets.’ Modern Physics Letters A 23, No. 23: 1885-1907. doi: 10.1142/S0217732308027461.
    • Baltz AJ, Baur G, d'Enterria D, Frankfurt L, Gelis F, Guzey V, Hencken K, Kharlov Yu, Klasen M, Klein SR, Nikulin V, Nystrand J, Pshenichnov IA, Sadovsky S, Scapparone E, Seger J, Strikman M, Tverskoy M, Vogt R, White SN, Wiedemann UA, Yepes P, Zhalov M. . ‘The physics of ultraperipheral collisions at the LHC.’ Physics Reports 458, No. 1-3: 1-171. doi: 10.1016/j.physrep.2007.12.001.
    • Bozzi G, Fuks B, Klasen M. . ‘Joint resummation for slepton pair production at hadron colliders.’ Nuclear Physics B 794, No. 1-2: 46-60. doi: 10.1016/j.nuclphysb.2007.10.021.
    • Fuks B, Klasen M, Ledroit F, Li Q, Morel J. . ‘Precision predictions for Z′-production at the CERN LHC: QCD matrix elements, parton showers, and joint resummation.’ Nuclear Physics B 797, No. 1-2: 322-339. doi: 10.1016/j.nuclphysb.2008.01.017.
    • Beenakker W, Klasen M, Kramer M, Plehn T, Spira M, Zerwas PM. . ‘Erratum: Production of charginos, neutralinos, and sleptons at hadron colliders (Physical Review Letters (1999) 83 (3780)).’ Physical Review Letters 100, No. 2. doi: 10.1103/PhysRevLett.100.029901.
    • Klasen M, Kniehl BA, Mihailǎ LN, Steinhauser M. . ‘Ghost contributions to charmonium production in polarized high-energy collisions.’ Physical Review D - Particles, Fields, Gravitation and Cosmology 77, No. 11. doi: 10.1103/PhysRevD.77.117501.
    • Klasen M, Lansberg JP. . ‘Perspectives for inclusive quarkonium production in photon-photon collisions at the LHC.’ Nuclear Physics B - Proceedings Supplements 179-180, No. C: 226-231. doi: 10.1016/j.nuclphysbps.2008.07.028.
    • Klasen M. . ‘High-energy photon collisions at the LHC - dream or reality?Nuclear Physics B - Proceedings Supplements 179-180, No. C: 298-309. doi: 10.1016/j.nuclphysbps.2008.07.037.
    • Debove J, Fuks B, Klasen M. . ‘Gaugino-pair production in polarized and unpolarized hadron collisions.’ Physical Review D - Particles, Fields, Gravitation and Cosmology 78, No. 7. doi: 10.1103/PhysRevD.78.074020.
    • d'Enterria D, Klasen M, Piotrzkowski K. . ‘Editorial.’ Nuclear Physics B - Proceedings Supplements 179-180, No. C: 1. doi: 10.1016/j.nuclphysbps.2008.07.001.
    • Lari T, Pape L, Porod W, Aguilar-Saavedra JA, Allanach BC, Burdman G, Castro N, Klasen M, Krasnikov N, Krauss F, Moortgat F, Polesello G, Tricomi A, Ünel G, del Aguila F, Alwall J, Andreev Y, Sierra DA, Bartl A, Beccaria M, Béjar S, Benucci L, Bityukov S, Borjanović I, Bozzi G, Carvalho J, Clerbaux B, de Campos F, de Gouvêa A, Dennis C, Djouadi A, Éboli OJP, Ellwanger U, Fassouliotis D, Ferreira PM, Frederix R, Fuks B, Gerard J-M, Giammanco A, Gninenko S, Gopalakrishna S, Goto T, Grzadkowski B, Guasch J, Hahn T, Heinemeyer S, Hektor A, Herquet M, Herrmann B, Hidaka K, Hirsch MK, Hohenwarter-Sodek K, Hollik W, Hou GWS, Hurth T, Ibarra A, Illana J, Kadastik M, Kalinin S, Karafasoulis C, Ünel MK, Kernreiter T, Kirsanov MM, Kou E, Kourkoumelis C, Kraml S, Kyriakis A, Lemaitre V, Macorini G, Magro MB, Majerotto W, Maltoni F, Matveev V, Mehdiyev R, Misiak M, Moreau G, Mühlleitner M, Müntel M, Onofre A, Özcan E, Palla F, Panizzi L, Peñaranda S, Pittau R, Pukhov A, Raidal M, Raklev AR, Rebane L, Renard FM, Restrepo D, Roupas Z, Santos R, Schumann S, Servant G, Siegert F, Skands P, Slavich P, Solà J, Spira M, Sultansoy S, Toropin A, Tseng J, Valle JWF, Veloso F, Ventura A, Vermisoglou G, Verzegnassi C, Villanova del Moral A, Weiglein G, Yilmaz M. . ‘Collider aspects of flavor physics at high Q.’ European Physical Journal C : 1-125.

    • Klasen M, Kramer G. . ‘Factorization breaking in dijet photoproduction with a leading neutron.’ European Physical Journal C 49, No. 4: 957-965.
    • Bozzi G, Fuks B, Klasen M. . ‘Threshold resummation for slepton-pair production at hadron colliders.’ Nuclear Physics B 777, No. 1-2: 157-181. doi: 10.1016/j.nuclphysb.2007.03.052.
    • Herrmann B, Klasen M. . ‘Supersymmetric QCD corrections to dark matter annihilation in the Higgs funnel region.’ Physical Review D - Particles, Fields, Gravitation and Cosmology 76, No. 11. doi: 10.1103/PhysRevD.76.117704.
    • Bozzi G, Fuks B, Herrmann B, Klasen M. . ‘Squark and gaugino hadroproduction and decays in non-minimal flavour violating supersymmetry.’ Nuclear Physics B 787, No. 1-2: 1-54. doi: 10.1016/j.nuclphysb.2007.05.031.
    • Klasen M, Pignol G. . ‘New results for light gravitinos at hadron colliders: Fermilab Tevatron limits and CERN LHC perspectives.’ Physical Review D - Particles, Fields, Gravitation and Cosmology 75, No. 11. doi: 10.1103/PhysRevD.75.115003.
    • Klasen M., List B., Hansmann-Menzemer S., Mankel R. . ‘Summary of the heavy flavor working group.’Contributed to the 15th International Workshop on Deep-Inelastic Scattering and Related Subjects, DIS 2007, Munich, deu.

    • Bozzi G, Fuks B, Klasen M. . ‘Transverse-momentum resummation for slepton-pair production at the CERN Large Hadron Collider.’ Physical Review D - Particles, Fields, Gravitation and Cosmology 74, No. 1.
    • Klasen M. . ‘Polarization and Resummation in Slepton Production at Hadron Colliders.’ Nuclear Physics B - Proceedings Supplements 160: 111-115. doi: 10.1016/j.nuclphysbps.2006.09.054.
    • Aguilar-Saavedra JA, Ali A, Allanach BC, Arnowitt R, Baer HA, Bagger JA, Balazs C, Barger V, Barnett M, Bartl A, Battaglia M, Bechtle P, Bélanger G, Belyaev A, Berger EL, Blair G, Boos E, Carena M, Choi SY, Deppisch F, de Roeck A, Desch K, Diaz MA, Djouadi A, Dutta B, Dutta S, Eberl H, Ellis J, Erler J, Fraas H, Freitas A, Fritzsche T, Godbole RM, Gounaris GJ, Guasch J, Gunion J, Haba N, Haber HE, Hagiwara K, Han L, Han T, He H-J, Heinemeyer S, Hesselbach S, Hidaka K, Hinchliffe I, Hirsch M, Hohenwarter-Sodek K, Hollik W, Hou WS, Hurth T, Jack I, Jiang Y, Jones DRT, Kalinowski J, Kamon T, Kane G, Kang SK, Kernreiter T, Kilian W, Kim CS, King SF, Kittel O, Klasen M, Kneur J-L, Kovarik K, Krämer M, Kraml S, Lafaye R, Langacker P, Logan HE, Ma W-G, Majerotto W, Martyn H-U, Matchev K, Miller DJ, Mondragon M, Moortgat-Pick G, Moretti S, Mori T, Moultaka G, Muanza S, Mühlleitner MM, Mukhopadhyaya B, Nauenberg U, Nojiri MM, Nomura D, Nowak H, Okada N, Olive KA, Öller W, Peskin M, Plehn T, Polesello G, Porod W, Quevedo F, Rainwater D, Reuter J, Richardson P, Rolbiecki K, Roy P, Rückl R, Rzehak H, Schleper P, Siyeon K, Skands P, Slavich P, Stöckinger D, Sphicas P, Spira M, Tait T, Tovey DR, Valle JWF, Wagner CEM, Weber C, Weiglein G, Wienemann P, Xing Z-Z, Yamada Y, Yang JM, Zerwas D, Zerwas PM, Zhang R-Y, Zhang X, Zhu S-H. . ‘Supersymmetry parameter analysis: SPA convention and project.’ European Physical Journal C 46, No. 1: 43-60.
    • Klasen M. . ‘From factorization to its breaking in diffractive duet production.’Contributed to the 5th International Workshop on New Trends in HERA Physics 2005, Rottach-Egern, Bavaria, deu.

    • Klasen M, Kniehl BA, Mihaila LN, Steinhauser M. . ‘J/ψ plus prompt-photon associated production in two-photon collisions at next-to-leading order.’ Physical Review D - Particles, Fields, Gravitation and Cosmology 71, No. 1: 014016-1-014016-14. doi: 10.1103/PhysRevD.71.014016.
    • Bozzi G, Fuks B, Klasen M. . ‘Slepton production in polarized hadron collisions.’ Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 609, No. 3-4: 339-350.
    • Klasen M. . ‘Status report of NNLO QCD calculations.’ AIP Conference Proceedings 792: 681-684. doi: 10.1063/1.2122129.
    • Bozzi G, Fuks B, Klasen M. . ‘Nondiagonal and mixed squark production at hadron colliders.’ Physical Review D - Particles, Fields, Gravitation and Cosmology 72, No. 3: 1-9.
    • Klasen M, Kniehl BA, Mihaila LN, Steinhauser M. . ‘J/ψ plus jet associated production in two-photon collisions at next-to-leading order.’ Nuclear Physics B 713, No. 1-3: 487-521. doi: 10.1016/j.nuclphysb.2005.02.009.
    • Klasen M, Kramer G. . ‘Factorization scheme and scale dependence in diffractive dijet production at low Q2.’ Journal of Physics G: Nuclear and Particle Physics 31, No. 12: 1391-1400. doi: 10.1088/0954-3899/31/12/001.
    • Klasen M, Kramer G. . ‘Diffractive dijet photoproduction.’ AIP Conference Proceedings 792: 444-448. doi: 10.1063/1.2122074.

    • Klasen M, Kramer G. . ‘Factorization breaking in diffractive dijet photoproduction.’ European Physical Journal C 38, No. 1: 93-104.
    • Klasen M, Kramer G. . ‘Evidence for factorization breaking in diffractive low-Q2 dijet production.’ Physical Review Letters 93, No. 23. doi: 10.1103/PhysRevLett.93.232002.

    • Klasen M. . ‘J/ψ production in direct and resolved γγ collisions.’ Nuclear Physics B - Proceedings Supplements 116: 141-145. doi: 10.1016/S0920-5632(03)80159-7.
    • Albino S, Klasen M, Söldner-Rembold S. . ‘Strong coupling constant from the photon structure function.’ Nuclear Physics B - Proceedings Supplements 121: 73. doi: 10.1016/S0920-5632(03)01816-4.
    • Berge S, Klasen M. . ‘Gluino pair production in high-energy photon collisions.’ European Physical Journal C 30, No. 1: 123-133.
    • Hagiwara K, Kanemura S, Klasen M, Umeda Y. . ‘One-loop contributions of charginos and neutralinos to W-pair production in e+e- collisions.’ Physical Review D 68, No. 11. doi: 10.1103/PhysRevD.68.113011.
    • Berger EL, Klasen M, Tait TMP. . ‘Erratum: Next-to-leading order supersymmetric QCD predictions for associated production of gauginos and gluinos (Physical Review D (2000) 62 (095014)).’ Physical Review D 67, No. 9. doi: 10.1103/PhysRevD.67.099901.
    • Klasen M, Kniehl BA, Mihaila LN, Steinhauser M. . ‘Charmonium production in polarized high-energy collisions.’ Physical Review D 68, No. 3. doi: 10.1103/PhysRevD.68.034017.
    • Klasen M. . ‘Calculating two- and three-body decays with FeynArts and FormCalc.’ International Journal of Modern Physics C 14, No. 9: 1273-1278. doi: 10.1142/S012918310300539X.

    • Klasen M. . ‘The pion structure function and jet production in γp → nX.’ Journal of Physics G: Nuclear and Particle Physics 28, No. 5: 1091-1101. doi: 10.1088/0954-3899/28/5/329.
    • Klasen M. . ‘Theory of hard photoproduction.’ Reviews of Modern Physics 74, No. 4: 1221-1282. doi: 10.1103/RevModPhys.74.1221.
    • Albino S, Klasen M, Söldner-Rembold S. . ‘Strong coupling constant from the photon structure function.’ Physical Review Letters 89, No. 12: 1220041-1220044.
    • Albino S, Klasen M, Söldner-Rembold S. . ‘Strong coupling constant from the photon structure function.’ Acta Physica Polonica B 33, No. 10: 2939-2945.
    • Berge S, Klasen M. . ‘Gluino pair production at linear e+e- colliders.’ Physical Review D 66, No. 11. doi: 10.1103/PhysRevD.66.115014.
    • Klasen M, Kniehl BA, Mihaila LN, Steinhauser M. . ‘Evidence for the color-octet mechanism from CERN LEP2 γγ → J/ψ + X data.’ Physical Review Letters 89, No. 3: 320011-320014.

    • Klasen M. . ‘Sfermion production at photon colliders.’ Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 472, No. 1-2: 160-164. doi: 10.1016/S0168-9002(01)01176-7.
    • Klasen M, Kniehl BA, Mihaila L, Steinhauser M. . ‘J/ψ plus dijet associated production in two-photon collisions.’ Nuclear Physics B 609, No. 3: 518-536. doi: 10.1016/S0550-3213(01)00318-2.
    • Klasen M, Kramer G. . ‘Photoproduction of jets on a virtual pion target in next-to-leading order QCD.’ Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 508, No. 3-4: 259-268.
    • Berge S, Klasen M, Umeda Y. . ‘Sfermion pair production in polarized and unpolarized γγ collisions.’ Physical Review D 63, No. 3. doi: 10.1103/PhysRevD.63.035003.

    • Berger EL, Gordon LE, Klasen M. . ‘Spin dependence of massive lepton pair production in proton-proton collisions.’ Physical Review D - Particles, Fields, Gravitation and Cosmology 62, No. 1: 1-12.
    • Berger EL, Klasen M. . ‘Low mass lepton pair production in hadron collisions.’ Nuclear Physics B - Proceedings Supplements 82, No. 1-3: 179-184. doi: 10.1016/S0920-5632(00)00151-1.
    • Berger EL, Klasen M, Tait TMP. . ‘Next-to-leading order supersymmetric QCD predictions for associated production of gauginos and gluinos.’ Physical Review D - Particles, Fields, Gravitation and Cosmology 62, No. 9: 1-38.
    • Klasen M. . ‘Photon structure and the production of jets, hadrons, and prompt photons.’ Lect. Notes Phys. 546. doi: 10.1007/3-540-46522-7_19.

    • Berger EL, Klasen M, Tait T. . ‘Scale dependence of squark and gluino production cross sections.’ Physical Review D - Particles, Fields, Gravitation and Cosmology 59, No. 7: 1-10.
    • Klasen M. . ‘Three jet cross sections in photoproduction at HERA.’ European Physical Journal C 7, No. 2: 225-232.
    • Beenakker W, Klasen M, Krämer M, Plehn T, Spira M, Zerwas PM. . ‘Production of Charginos, Neutralinos, and Sleptons at Hadron Colliders.’ Physical Review Letters 83, No. 19: 3780-3783. doi: 10.1103/PhysRevLett.83.3780.
    • Berger EL, Klasen M, Tait T. . ‘Associated production of gauginos and gluinos at hadron colliders in next-to-leading order SUSY-QCD.’ Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 459, No. 1-3: 165-170.
    • Berger EL, Harris BW, Klasen M, Tait TMP. . ‘SUSY production cross-sections.’ In Physics at Run II: Workshop on Supersymmetry / Higgs: Summary Meeting Batavia, Illinois, November 19-21, 1998, edited by (Ed.): .
    • Berger EL, Klasen M. . ‘Lepton pair production at the LHC and the gluon density in the proton.’ In 1999 CERN Workshop on standard model physics (and more) at the LHC, CERN, Geneva, Switzerland, 25-26 May: Proceedings, edited by (Ed.): .

    • Berger EL, Gordon LE, Klasen M. . ‘Massive lepton pairs as a prompt photon surrogate.’ Physical Review D - Particles, Fields, Gravitation and Cosmology 58, No. 7.
    • Klasen M, Kramer G, Pötter B. . ‘Inclusive jet production with virtual photons in next-to-leading order QCD.’ European Physical Journal C 1, No. 1-2: 261-270.
    • Klasen M. . ‘Photon scattering in muon collisions.’ AIP Conf. Proc. 435: 495-504. doi: 10.1063/1.56178.
    • Schellman H, others. . ‘Deep inelastic scattering at a muon collider: Neutrino physics.’ AIP Conf. Proc. 435: 166-176.
    • Harris BW, Klasen M, Vossebeld J. . ‘Detailed comparison of next-to-leading order predictions for jet photoproduction at HERA.’ In Monte Carlo generators for HERA physics. Proceedings, Workshop, Hamburg, Germany, 1998-1999, edited by (Ed.): .

    • Klasen M, Kramer G. . ‘Inclusive two-jet production at HERA: Direct and resolved cross sections in next-to-leading order QCD.’ Zeitschrift fur Physik C-Particles and Fields 76, No. 1: 67-74. doi: 10.1007/s002880050528.
    • Klasen M, Kramer G. . ‘Jet shapes in ep and pp̄ collisions in NLO QCD.’ Physical Review D - Particles, Fields, Gravitation and Cosmology 56, No. 5: 2702-2712. doi: 10.1103/PhysRevD.56.2702.
    • Klasen M. . ‘Theoretical overview of jet photoproduction at HERA.’ In New trends in HERA physics. Proceedings, Workshop, Ringberg Castle, Tegernsee, Germany, May 25-30, 1997, edited by (Ed.): .

    • Klasen M, Kramer G. . ‘Dijet cross sections in photon-proton collisions.’ Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 366, No. 1-4: 385-393.
    • Klasen M, Kramer G. . ‘Large transverse momentum jet production and DIS distributions of the proton.’ Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 386, No. 1-4: 384-388.
    • Klasen M, Kramer G. . ‘Inclusive dijet production at HERA: Direct photon cross sections in next-to-leading order QCD.’ Zeitschrift fur Physik C-Particles and Fields 72, No. 1: 107-122. doi: 10.1007/s002880050229.
    • Butterworth JM, Feld L, Klasen M, Kramer G. . ‘Matching experimental and theoretical jet definitions for photoproduction at HERA.’ In Future physics with light and heavy nuclei at HERMES. Contributions to the proceedings of the '95 - '96 Workshop on Future Physics at HERA, working group on light and heavy nuclei at HERA. Part 2, edited by (Ed.): .
    • Klasen M. . ‘Photoproduction of jets at HERA.’ In Proceedings, 4th International Workshop on Deep inelastic scattering and related phenomena (DIS 96), edited by (Ed.): .
    • Klasen M. . Photoproduction of jets at HERA in next-to-leading order QCD Doctoral Thesis, Hamburg U.

    • Klasen M, Kramer G, Salesch SG. . ‘Photoproduction of jets at HERA: Comparison of next-to-leading order calculation with ZEUS data.’ Zeitschrift für Physik C Particles and Fields 68, No. 1: 113-120. doi: 10.1007/BF01579810.

    • Pollock RE, Klasen M, Lash J, Sloan T. . ‘An electron probe as a stored beam diagnostic.’ Nuclear Inst. and Methods in Physics Research, A 330, No. 1-2: 27-32. doi: 10.1016/0168-9002(93)91300-C.