Publications
- Blümke, Maximilian, Schmitz, Kai, Schröder, Tobias, Agarwal, Deepali, and Romano, Joseph D. . “Kinematic anisotropies in PTA observations: Analytical toolkit.” Symmetry 18 (2) 355. doi: 10.3390/sym18020355.
- Agarwal, Nikita, and et, al. [NANOGrav Collaboration]. . “The NANOGrav 15 yr dataset: Targeted searches for supermassive black hole binaries.” Astrophysical Journal Letters 998 (1) L11. doi: 10.3847/2041-8213/ae3719.
- Matt, Cayenne, and et, al. [NANOGrav Collaboration]. . “Inferring MBH–Mbulge evolution from the gravitational-wave background.” Astrophysical Journal 997 (2) 188. doi: 10.3847/1538-4357/ae2480.
- Schmitz, Kai, and Schröder, Tobias. . “Gravitational waves from cosmic strings for pedestrians.” Journal of Cosmology and Astroparticle Physics 2026 (01) 025. doi: 10.1088/1475-7516/2026/01/025.
- von Eckardstein, Richard, Schmitz, Kai, and Sobol, Oleksandr. . “Gravitational waves from axion inflation in the gradient expansion formalism. Part I. Pure axion inflation.” Journal of High Energy Physics 2026 (01) 018. doi: 10.1007/JHEP01(2026)018.
- Sobol, Oleksandr., Eckardstein, Richard, Koch, EliasR., Gurevich, Svetlana V., Thiele, Uwe, and Schmitz, Kai. . “Nonlinear physics of axion inflation.” Journal of High Energy Physics 2026 (6): 166–166. doi: 10.1007/JHEP06(2026)166.
- Mojahed, Martin A., Schmitz, Kai, and Wilken, Dominik. . “A lower bound on the right-handed neutrino mass from wash-in leptogenesis.” Physics Letters B 871 139997. doi: 10.1016/j.physletb.2025.139997.
- Agazie, Gabriella, and et, al. [NANOGrav Collaboration]. . “The NANOGrav 15 yr data set: Search for gravitational-wave memory.” Astrophysical Journal 987 (1) 5. doi: 10.3847/1538-4357/add874.
- Agazie, Gabriella, and et, al. [NANOGrav Collaboration]. . “The NANOGrav 15 yr data set: Harmonic analysis of the pulsar angular correlations.” Astrophysical Journal 985 (1) 99. doi: 10.3847/1538-4357/adc997.
- Mojahed, Martin A., Schmitz, Kai, and Xu, Xun-Jie. . “Gravitational charge production.” Physical Review D (PRD) 111 (5) 055005. doi: 10.1103/PhysRevD.111.055005.
- Agazie, G., and et, al. [NANOGrav Collaboration]. . “The NANOGrav 15 yr dataset: Posterior predictive checks for gravitational-wave detection with pulsar timing arrays.” Physical Review D (PRD) 111 (4) 042011. doi: 10.1103/PhysRevD.111.042011.
- von Eckardstein, Richard, Schmitz, Kai, and Sobol, Oleksandr. . “On the Schwinger effect during axion inflation.” Journal of High Energy Physics 2025 (02) 096. doi: 10.1007/JHEP02(2025)096.
- Agazie, G., and et, al. [NANOGrav Collaboration]. . “The NANOGrav 15 yr data set: Removing pulsars one by one from the pulsar timing array.” Astrophysical Journal 978 (2) 168. doi: 10.3847/1538-4357/ad93aa.
- Agazie, G., and et, al. [NANOGrav Collaboration]. . “The NANOGrav 15 yr data set: Running of the spectral index.” Astrophysical Journal Letters 978 (2) L29. doi: 10.3847/2041-8213/ad99d3.
- Schmitz, Kai, and Schröder, Tobias. . “Gravitational waves from low-scale cosmic strings without scaling.” Physical Review D (PRD) 112 (8) 083517. doi: 10.1103/bv4k-xkmt.
- Agazie, G., and et, al. [NANOGrav Collaboration]. . “The NANOGrav 15 yr data set: Looking for signs of discreteness in the gravitational-wave background.” Astrophysical Journal 978 (1) 31. doi: 10.3847/1538-4357/ad93d5.
- Cordes, Nina, Mitridate, Andrea, Schmitz, Kai, Schröder, Tobias, and Wassner, Kim. . “On the overlap reduction function of pulsar timing array searches for gravitational waves in modified gravity.” Classical and Quantum Gravity 42 (1) 015003. doi: 10.1088/1361-6382/ad9881.
- Schmitz, Kai, and Schröder, Tobias. . “Gravitational waves from low-scale cosmic strings.” Physical Review D (PRD) 110 (6) 063549. doi: 10.1103/PhysRevD.110.063549.
- Durrer, Ruth, von Eckardstein, Richard, Garg, Deepen, Schmitz, Kai, Sobol, Oleksandr, and Vilchinskii, Stanislav. . “Scalar perturbations from inflation in the presence of gauge fields.” Physical Review D (PRD) 110 (4) 043533. doi: 10.1103/PhysRevD.110.043533.
- Agazie, G., and et, al. [IPTA Collaboration]. . “Comparing recent pulsar timing array results on the nanohertz stochastic gravitational-wave background.” Astrophysical Journal 966 (1) 105. doi: 10.3847/1538-4357/ad36be.
- Agazie, G., and et, al. [NANOGrav Collaboration]. . “The NANOGrav 15 yr data set: Search for transverse polarization modes in the gravitational-wave background.” Astrophysical Journal Letters 964 (1) L14. doi: 10.3847/2041-8213/ad2a51.
- Agazie, G., and et, al. [NANOGrav Collaboration]. . “The NANOGrav 12.5 yr data set: A computationally efficient eccentric binary search pipeline and constraints on an eccentric supermassive binary candidate in 3C 66B.” Astrophysical Journal 963 (2) 144. doi: 10.3847/1538-4357/ad1f61.
- Agazie, G., and et, al. [NANOGrav Collaboration]. . “The NANOGrav 12.5 yr data set: Search for gravitational wave memory.” Astrophysical Journal 963 (1) 61. doi: 10.3847/1538-4357/ad0726.
- Schmitz, Kai, and Xu, Xun-Jie. . “Wash-in leptogenesis after the evaporation of primordial black holes.” Physics Letters B 849 138473. doi: 10.1016/j.physletb.2024.138473.
- Johnson, Aaron D., and et, al. [NANOGrav Collaboration]. . “NANOGrav 15-year gravitational-wave background methods.” Physical Review D (PRD) 109 (10) 103012. doi: 10.1103/PhysRevD.109.103012.
- Bécsy, B., and et, al. [NANOGrav Collaboration]. . “How to detect an astrophysical nanohertz gravitational wave background.” Astrophysical Journal 959 (1): 9.. doi: 10.3847/1538-4357/ad09e4.
- von Eckardstein, Richard, Peloso, Marco, Schmitz, Kai, Sobol, Oleksandr, and Sorbo, Lorenzo. . “Axion inflation in the strong-backreaction regime: decay of the Anber-Sorbo solution.” Journal of High Energy Physics 2023 183. doi: 10.1007/JHEP11(2023)183.
- Buchmüller, Wilfried, Domcke, Valerie, and Schmitz, Kai. . “Metastable cosmic strings.” Journal of Cosmology and Astroparticle Physics 2023 (11) 020. doi: 10.1088/1475-7516/2023/11/020.
- Agazie, G., and et, al. [NANOGrav Collaboration]. . “The NANOGrav 15 yr data set: Search for anisotropy in the gravitational-wave background.” Astrophysical Journal Letters 956 (1): L3.. doi: 10.3847/2041-8213/acf4fd.
- Brandenburg, Axel, Kamada, Kohei, Mukaida, Kyohei, Schmitz, Kai, and Schober, Jennifer. . “Chiral magnetohydrodynamics with zero total chirality.” Physical Review D (PRD) 108 063529. doi: 10.1103/PhysRevD.108.063529.
- Agazie, G., and et, al. [NANOGrav Collaboration]. . “The NANOGrav 15 yr data set: Constraints on supermassive black hole binaries from the gravitational-wave background.” Astrophysical Journal Letters 952 (2): L37.. doi: 10.3847/2041-8213/ace18b.
- Agazie, G., and et, al. [NANOGrav Collaboration]. . “The NANOGrav 15 yr data set: Bayesian limits on gravitational waves from individual supermassive black hole binaries.” Astrophysical Journal Letters 951 (2): L50.. doi: 10.3847/2041-8213/ace18a.
- Domcke, Valerie, Kamada, Kohei, Mukaida, Kyohei, Schmitz, Kai, and Yamada, Masaki. . “New constraint on primordial lepton flavor asymmetries.” Physical Review Letters 130 261803. doi: 10.1103/PhysRevLett.130.261803.
- Agazie, G., and et, al. [NANOGrav Collaboration]. . “The NANOGrav 15 yr data set: Detector characterization and noise budget.” Astrophysical Journal Letters 951 (1): L10.. doi: 10.3847/2041-8213/acda88.
- Agazie, G., and et, al. [NANOGrav Collaboration]. . “The NANOGrav 15 yr data set: Evidence for a gravitational-wave background.” Astrophysical Journal Letters 951 (1): L8.. doi: 10.3847/2041-8213/acdac6.
- Agazie, G., and et, al. [NANOGrav Collaboration]. . “The NANOGrav 15 yr data set: Observations and timing of 68 millisecond pulsars.” Astrophysical Journal Letters 951 (1): L9.. doi: 10.3847/2041-8213/acda9a.
- Afzal, A., and et, al. [NANOGrav Collaboration]. . “The NANOGrav 15 yr data set: Search for signals from new physics.” Astrophysical Journal Letters 951 (1): L11.. doi: 10.3847/2041-8213/acdc91.
- Auclair, Pierre, Blasi, Simone, Brdar, Vedran, and Schmitz, Kai. . “Gravitational waves from current-carrying cosmic strings.” Journal of Cosmology and Astroparticle Physics 2023 (04) 009. doi: 10.1088/1475-7516/2023/04/009.
- Papageorgiou, Alexandros, Quílez, Pablo, and Schmitz, Kai. . “Axion dark matter from frictional misalignment.” Journal of High Energy Physics 2023 (1) 169. doi: 10.1007/JHEP01(2023)169.
- Domcke, Valerie, Kamada, Kohei, Mukaida, Kyohei, Schmitz, Kai, and Yamada, Masaki. . “Wash-in leptogenesis after axion inflation.” Journal of High Energy Physics 2023 (1) 53. doi: 10.1007/JHEP01(2023)053.
- Mitridate, A, Wright, D, von, Eckardstein R, Schröder, T, Nay, J, Olum, K, Schmitz, K, and Trickle, T. . “PTArcade.” Preprint. arXiv doi: 10.48550/arXiv.2306.16377.
- Schmitz, Kai. . “Modern cosmology, an amuse-gueule.” in Advances in Cosmology: Science - Art - Philosophy, edited by Marilena Streit-Bianchi, Paola Catapano, Cristiano Galbiati and Enrico Magnani. Cham: Springer. doi: 10.1007/978-3-031-05625-3.
- Domcke, Valerie, Schmitz, Kai, and You, Tevong. . “Cosmological relaxation through the dark axion portal.” Journal of High Energy Physics 2022 (7) 126. doi: 10.1007/JHEP07(2022)126.
- Mukaida, Kyohei, Schmitz, Kai, and Yamada, Masaki. . “Baryon asymmetry of the universe from lepton flavor violation.” Physical Review Letters 129 (1) 011803. doi: 10.1103/PhysRevLett.129.011803.
- LISA Cosmology Working Group. . “Cosmology with the Laser Interferometer Space Antenna.” Preprint. arXiv doi: 10.48550/arXiv.2204.05434.
- Elor, Gilly, Harz, Julia, Ipek, Seyda, Shakya, Bibhushan, Blinov, Nikita, Co, Raymond T., Cui, Yanou, Dasgupta, Arnab, Davoudiasl, Hooman, Elahi, Fatemeh, Fridell, Kåre, Ghalsasi, Akshay, Harigaya, Keisuke, Hati, Chandan, Huang, Peisi, Maleknejad, Azadeh, McGehee, Robert, Morrissey, David E., Schmitz, Kai, Shamma, Michael, Shuve, Brian, Tucker-Smith, David, van de Vis, Jorinde, and White, Graham. . “New ideas in baryogenesis: A Snowmass white paper.” Preprint. contribution to the 2022 Snowmass Summer Study, Seattle doi: 10.48550/arXiv.2203.05010.
- Gorbar, Eduard V., Schmitz, Kai, Sobol, Oleksandr O., and Vilchinskii, Stanislav I. . “Hypermagnetogenesis from axion inflation: Model-independent estimates.” Physical Review D (PRD) 105 (4) 043530. doi: 10.1103/PhysRevD.105.043530.
- International Pulsar Timing Array (IPTA) Collaboration. . “The International Pulsar Timing Array second data release: Search for an isotropic gravitational wave background.” Monthly Notices of the Royal Astronomical Society 510 (4): 4873–4887. doi: 10.1093/mnras/stab3418.
- Buchmüller, Wilfried, Domcke, Valerie, and Schmitz, Kai. . “Stochastic gravitational-wave background from metastable cosmic strings.” Journal of Cosmology and Astroparticle Physics 2021 (12) 006. doi: 10.1088/1475-7516/2021/12/006.
- Gorbar, Eduard V., Schmitz, Kai, Sobol, Oleksandr O., and Vilchinskii, Stanislav I. . “Gauge-field production during axion inflation in the gradient expansion formalism.” Physical Review D (PRD) 104 (12) 123504. doi: 10.1103/PhysRevD.104.123504.
- European Consortium for Astroparticle Theory (EuCAPT). . “EuCAPT White Paper: Opportunities and challenges for theoretical astroparticle physics in the next decade.” Preprint. arXiv doi: 10.48550/arXiv.2110.10074.
- Rink, Thomas, Rodejohann, Werner, Schmitz, and Kai. . “Leptogenesis and low-energy CP violation in a type-II-dominated left-right seesaw model.” Nuclear Physics B 972 115552. doi: 10.1016/j.nuclphysb.2021.115552.
- Domcke, Valerie, Kamada, Kohei, Mukaida, Kyohei, Schmitz, Kai, Yamada, and Masaki. . “Wash-in leptogenesis.” Physical Review Letters 126 (20) 201802. doi: 10.1103/PhysRevLett.126.201802.
- Giese, Felix, Konstandin, Thomas, Schmitz, Kai, van, de Vis, and Jorinde. . “Model-independent energy budget for LISA.” Journal of Cosmology and Astroparticle Physics 2021 (01) 072. doi: 10.1088/1475-7516/2021/01/072.
- Blasi, Simone, Brdar, Vedran, Schmitz, and Kai. . “Has NANOGrav found first evidence for cosmic strings?” Physical Review Letters 126 (4) 041305. doi: 10.1103/PhysRevLett.126.041305.
- Schmitz, and Kai. . “New sensitivity curves for gravitational-wave signals from cosmological phase transitions.” Journal of High Energy Physics 2021 (1) 97. doi: 10.1007/JHEP01(2021)097.
- Buchmüller, Wilfried, Domcke, Valerie, Schmitz, and Kai. . “From NANOGrav to LIGO with metastable cosmic strings.” Physics Letters B 811 135914. doi: 10.1016/j.physletb.2020.135914.
- Blasi, Simone, Brdar, Vedran, and Schmitz, Kai. . “Fingerprint of low-scale leptogenesis in the primordial gravitational-wave spectrum.” Physical Review Research 2 (4) 043321. doi: 10.1103/PhysRevResearch.2.043321.
- Buchmüller, Wilfried, Domcke, Valerie, Murayama, Hitoshi, and Schmitz, Kai. . “Probing the scale of grand unification with gravitational waves.” Physics Letters B 809 135764. doi: 10.1016/j.physletb.2020.135764.
- Schmitz, Kai. . “LISA sensitivity to gravitational waves from sound waves.” Symmetry 12 (9) 1477. doi: 10.3390/sym12091477.
- Schmitz, Kai. . “Trans-planckian censorship and inflation in grand unified theories.” Physics Letters B 803 135317. doi: 10.1016/j.physletb.2020.135317.
- Alanne, Tommi, Hugle, Thomas, Platscher, Moritz, and Schmitz, Kai. . “A fresh look at the gravitational-wave signal from cosmological phase transitions.” Journal of High Energy Physics 2020 4. doi: 10.1007/JHEP03(2020)004.
- Brdar, Vedran, Helmboldt, Alexander J., Iwamoto, Sho, and Schmitz, Kai. . “Type-I seesaw as the common origin of neutrino mass, baryon asymmetry, and the electroweak scale.” Physical Review D (PRD) 100 (7) 075029. doi: 10.1103/PhysRevD.100.075029.
- D'Eramo, Francesco, and Schmitz, Kai. . “Imprint of a scalar era on the primordial spectrum of gravitational waves.” Physical Review Research 1 (1) 013010. doi: 10.1103/PhysRevResearch.1.013010.
- Kubo, Jisuke, Lindner, Manfred, Schmitz, Kai, and Yamada, Masatoshi. . “Planck mass and inflation as consequences of dynamically broken scale invariance.” Physical Review D (PRD) 100 (1) 015037. doi: 10.1103/PhysRevD.100.015037.
- Alanne, Tommi, Hugle, Thomas, Platscher, Moritz, and Schmitz, Kai. . “Low-scale leptogenesis assisted by a real scalar singlet.” Journal of Cosmology and Astroparticle Physics 2019 (3) 37. doi: 10.1088/1475-7516/2019/03/037.
- Schmitz, Kai, and Yanagida, Tsutomu. . “Axion isocurvature perturbations in low-scale models of hybrid inflation.” Physical Review D (PRD) 98 (7) 075003. doi: 10.1103/PhysRevD.98.075003.
- Hugle, Thomas, Platscher, Moritz, and Schmitz, Kai. . “Low-scale leptogenesis in the scotogenic neutrino mass model.” Physical Review D (PRD) 98 (2) 023020. doi: 10.1103/PhysRevD.98.023020.
- Domcke, Valerie, and Schmitz, Kai. . “Inflation from high-scale supersymmetry breaking.” Physical Review D (PRD) 97 (11) 115025. doi: 10.1103/PhysRevD.97.115025.
- Jimenez, Daniel, Kamada, Kohei, Schmitz, Kai, and Xu, Xun-Jie. . “Baryon asymmetry and gravitational waves from pseudoscalar inflation.” Journal of Cosmology and Astroparticle Physics 2017 (12) 11. doi: 10.1088/1475-7516/2017/12/011.
- Harigaya, Keisuke, and Schmitz, Kai. . “Unified model of chaotic inflation and dynamical supersymmetry breaking.” Physics Letters B 773: 320–324. doi: 10.1016/j.physletb.2017.08.050.
- Domcke, Valerie, and Schmitz, Kai. . “Unified model of D-term inflation.” Physical Review D (PRD) 95 (7) 075020. doi: 10.1103/PhysRevD.95.075020.
- Rink, Thomas, and Schmitz, Kai. . “Perturbed Yukawa textures in the minimal seesaw model.” Journal of High Energy Physics 2017 (3) 158. doi: 10.1007/JHEP03(2017)158.
- Björkeroth, Fredrik, King, Stephen F., Schmitz, Kai, and Yanagida, Tsutomu. . “Leptogenesis after chaotic sneutrino inflation and the supersymmetry breaking scale.” Nuclear Physics B 916: 688–708. doi: 10.1016/j.nuclphysb.2017.01.017.
- Rink, Thomas, Schmitz, Kai, and Yanagida, Tsutomu. . “Minimal seesaw model with a discrete heavy-neutrino exchange symmetry.” Preprint. arXiv doi: 10.48550/arXiv.1612.08878.
- Schmitz, Kai, and Yanagida, Tsutomu. . “Dynamical supersymmetry breaking and late-time R symmetry breaking as the origin of cosmic inflation.” Physical Review D (PRD) 94 (7) 074021. doi: 10.1103/PhysRevD.94.074021.
- Babu, Kaladi S., Schmitz, Kai, and Yanagida, Tsutomu. . “Pure gravity mediation and spontaneous B-L breaking from strong dynamics.” Nuclear Physics B 905: 73–95. doi: 10.1016/j.nuclphysb.2016.01.023.
- Harigaya, Keisuke, Ibe, Masahiro, Schmitz, Kai, and Yanagida, Tsutomu. . “Peccei-Quinn symmetry from dynamical supersymmetry breaking.” Physical Review D (PRD) 92 (7) 075003. doi: 10.1103/PhysRevD.92.075003.
- Harigaya, Keisuke, Ibe, Masahiro, Schmitz, Kai, and Yanagida, Tsutomu. . “Cosmological selection of multi-TeV supersymmetry.” Physics Letters B 749: 298–303. doi: 10.1016/j.physletb.2015.07.073.
- Kusenko, Alexander, Schmitz, Kai, and Yanagida, Tsutomu. . “Leptogenesis via axion oscillations after inflation.” Physical Review Letters 115 (1) 011302. doi: 10.1103/PhysRevLett.115.011302.
- Schmitz, Kai. . “Leptogenesis during axion relaxation after inflation.” Preprint. contribution to the 2nd Toyama International Workshop on Higgs as a Probe of New Physics, Toyama doi: 10.48550/arXiv.1503.08908.
- Domcke, Valerie, Schmitz, Kai, and Yanagida, Tsutomu. . “Dynamical D-terms in supergravity.” Nuclear Physics B 891: 230–258. doi: 10.1016/j.nuclphysb.2014.12.007.
- Harigaya, Keisuke, Ibe, Masahiro, Schmitz, Kai, and Yanagida, Tsutomu. . “Dynamical fractional chaotic inflation.” Physical Review D (PRD) 90 (12) 123524. doi: 10.1103/PhysRevD.90.123524.
- Buchmüller, Wilfried, Domcke, Valerie, and Schmitz, Kai. . “The chaotic regime of D-term inflation.” Journal of Cosmology and Astroparticle Physics 2014 (11) 6. doi: 10.1088/1475-7516/2014/11/006.
- Buchmüller, Wilfried, Domcke, Valerie, Kamada, Kohei, Schmitz, and Kai. . “Hybrid inflation in the complex plane.” Journal of Cosmology and Astroparticle Physics 2014 (7) 54. doi: 10.1088/1475-7516/2014/07/054.
- Harigaya, Keisuke, Ibe, Masahiro, Schmitz, Kai, and Yanagida, Tsutomu. . “Dynamical chaotic inflation in the light of BICEP2.” Physics Letters B 733: 283–287. doi: 10.1016/j.physletb.2014.04.057.
- Buchmüller, Wilfried, Domcke, Valerie, Kamada, Kohei, and Schmitz, Kai. . “A minimal supersymmetric model of particle physics and the early universe.” in Cosmology and Particle Physics beyond Standard Models : Ten Years of the SEENET-MTP Network, Vol. CERN-Proceedings-2014-001 of CERN Proceedings, edited by Luis Álvarez-Gaumé, Goran S. Djordjevic and Dejan Stojkovic. Geneva: CERN.
- Schmitz, Kai. . “The B-L phase transition: Implications for cosmology and neutrinos.” Dissertation thesis, Universität Hamburg. doi: 10.1007/978-3-319-00963-6.
- Harigaya, Keisuke, Ibe, Masahiro, Schmitz, Kai, and Yanagida, Tsutomu. . “Peccei-Quinn symmetry from a gauged discrete R symmetry.” Physical Review D (PRD) 88 (7) 075022. doi: 10.1103/PhysRevD.88.075022.
- Buchmüller, Wilfried Domcke Valerie, Kamada, Kohei, and Schmitz, Kai. . “The gravitational wave spectrum from cosmological B-L breaking.” Journal of Cosmology and Astroparticle Physics 2013 (10) 3. doi: 10.1088/1475-7516/2013/10/003.
- Harigaya, Keisuke, Ibe, Masahiro, Schmitz, Kai, and Yanagida, Tsutomu. . “A simple solution to the Polonyi problem in gravity mediation.” Physics Letters B 721 (1–3): 86–89. doi: 10.1016/j.physletb.2013.03.001.
- Buchmüller, Wilfried, Domcke, Valerie, and Schmitz, Kai. . “Superconformal D-term inflation.” Journal of Cosmology and Astroparticle Physics 2013 (4) 19. doi: 10.1088/1475-7516/2013/04/019.
- Harigaya, Keisuke, Ibe, Masahiro, Schmitz, Kai, and Yanagida, Tsutomu. . “Chaotic inflation with a fractional power-law potential in strongly coupled gauge theories.” Physics Letters B 720 (1–3): 125–129. doi: 10.1016/j.physletb.2013.01.058.
- Buchmüller, Wilfried, Domcke, Valerie, and Schmitz, Kai. . “Spontaneous B-L breaking as the origin of the hot early universe.” Nuclear Physics B 862 (3): 587–632. doi: 10.1016/j.nuclphysb.2012.05.001.
- Buchmüller, Wilfried, Domcke, Valerie, and Schmitz, Kai. . “WIMP dark matter from gravitino decays and leptogenesis.” Physics Letters B 713 (2): 63–67. doi: 10.1016/j.physletb.2012.05.042.
- Buchmüller, Wilfried, Domcke, Valerie, and Schmitz, Kai. . “Predicting θ_13 and the neutrino mass scale from quark lepton mass hierarchies.” Journal of High Energy Physics 2012 (3) 8. doi: 10.1007/JHEP03(2012)008.
- Schmitz, Kai. . “The B-L phase transition: Implications for cosmology and neutrinos.” Dissertation thesis, Universität Hamburg. doi: 10.48550/arXiv.1307.3887.
- Buchmüller, Wilfried, Schmitz, Kai, and Vertongen, Gilles. . “Entropy, baryon asymmetry and dark matter from heavy neutrino decays.” Nuclear Physics B 851 (3): 481–532. doi: 10.1016/j.nuclphysb.2011.06.004.
- Buchmüller, Wilfried, Schmitz, Kai, and Vertongen, Gilles. . “Matter and dark matter from false vacuum decay.” Physics Letters B 693 (4): 421–425. doi: 10.1016/j.physletb.2010.09.004.
- Hsieh, Ken, Schmitz, Kai, Yu, Jiang-Hao, and Yuan, Chien-Peng. . “Global analysis of general SU(2)xSU(2)xU(1) models with precision data.” Physical Review D (PRD) 82 (3) 035011. doi: 10.1103/PhysRevD.82.035011.