Heidelberg-Moscow Double Beta Decay Experiment (76Ge)

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1 - Articles

Results of the experiment on investigation of Germanium-76 double beta decay. Experimental data of Heidelberg-Moscow collaboration November 1995 - August 2001, A.M. Bakalyarov et al. (C03-06-23.1), Phys. Part. Nucl. Lett. 2 (2005) 77, arXiv:hep-ex/0309016.
Latest results from the Heidelberg-Moscow double beta decay experiment, H. V. Klapdor-Kleingrothaus et al., Eur. Phys. J. A12 (2001) 147-154.
Comment: Lower bound for the neutrinoless double-beta decay half-life of 76Ge: T1/2 > 1.9 × 1025 y at 90% CL. The corresponding upper bound for the effective neutrino mass is <m> < 0.35 eV. (C.G.).
Heidelberg - Moscow beta beta experiment with Ge-76: Full setup with five detectors, M. Gunther et al., Phys. Rev. D55 (1997) 54-67.

2 - -evi

Why is the Conclusion of the GERDA Experiment not Justified ?, Hans Volker Klapdor-Kleingrothaus, Irina V. Krivosheina, Sergey N. Karpov, Phys.Part.Nucl.Lett. 10 (2013) 704-709, arXiv:1308.2524.
Klapdor's claim for the observation of the neutrinoless double beta-decay of Ge-76. Analysis and corrections, Kirpichnikov I.V., arXiv:1006.2025, 2010.
The evidence for the observation of 0nu beta beta decay: The identification of 0nu beta beta events from the full spectra, H. V. Klapdor-Kleingrothaus, I. V. Krivosheina, Mod. Phys. Lett. A21 (2006) 1547-1566.
From the abstract: Two different methods of pulse shape analysis have been used to select potential $0\nu\beta\beta$ events from the $\gamma$-background. Both methods lead to selections of events at $Q_{\beta\beta}$ with almost no $\gamma$-background. The observed line at $Q_{\beta\beta}$ is identified as a $0\nu\beta\beta$ signal. It has a confidence level of more than $6\sigma$.
Search for neutrinoless double beta decay with enriched 76Ge in Gran Sasso 1990-2003, H.V. Klapdor-Kleingrothaus, I.V. Krivosheina, A. Dietz, O. Chkvorets, Phys. Lett. B586 (2004) 198-212, arXiv:hep-ph/0404088.
Search For Neutrinoless Double Beta Decay With Enriched 76Ge 1990-2003 - Heidelberg-Moscow Experiment, H.V. Klapdor-Kleingrothaus et al., arXiv:hep-ph/0404062, 2004. INFN, Laboratori Nazionali del Gran Sasso, Annual Report 2003 (2004).
Data acquisition and analysis of the 76Ge double beta experiment in Gran Sasso 1990-2003, H.V. Klapdor-Kleingrothaus, A. Dietz, O. Chkvorez, I.V. Krivosheina, Nucl. Instrum. Meth. A522 (2004) 371-406, arXiv:hep-ph/0403018.
From the abstract: the confidence level for the neutrinoless signal has been improved.
From the article: we confirm, with 4.2σ (99.9973% c.l.) probability, our claim from 2001 [Go], [Go], [Go], [Go], [Go] of first evidence for the neutrinoless double beta decay mode.
Using the nuclear matrix element from Refs.[Go,Go], we conclude from the half-life given above the effective mass $\langle m \rangle$ to be $\langle m \rangle = (0.2-0.6) \, \mathrm{eV}$ (99.73% c.l.) with the best value of 0.4 eV.
Allowing conservatively for an uncertainty of the nuclear matrix element of ±50%, the range for the effective mass may widen to $\langle m \rangle = (0.1-0.9) \, \mathrm{eV}$ (99.73% c.l.).

From nuclear physics to physics beyond the standard model: first evidence for lepton number violation and the Majorana character of neutrinos, H. V. Klapdor-Kleingrothaus, Int. J. Mod. Phys. D13 (2004) 2107-2126. http://www.worldscinet.com/ijmpd/13/preserved-docs/1310/S0218271804006656.pdf.
Neutrinoless double beta decay: Status of evidence, H. V. Klapdor-Kleingrothaus, A. Dietz, I. V. Krivosheina, Found. Phys. 32 (2002) 1181-1223, arXiv:hep-ph/0302248.
One Year of Evidence for Neutrinoless Double Beta Decay, H.V. Klapdor-Kleingrothaus, Proc.Indian Natl.Sci.Acad. 70A (2004) 95, arXiv:hep-ph/0302237.
Reply to the comment on 'Evidence for neutrinoless double beta decay'. (Mod. Phys. Lett. A16 (2001) 2409), H. L. Harney, arXiv:hep-ph/0205293, 2002.
Reply to a comment of article 'Evidence for neutrinoless double beta decay', H. V. Klapdor-Kleingrothaus, arXiv:hep-ph/0205228, 2002.
Evidence for Neutrinoless Double Beta Decay, H. V. Klapdor-Kleingrothaus, A. Dietz, H. L. Harney, I. V. Krivosheina, Mod. Phys. Lett. A16 (2001) 2409-2420, arXiv:hep-ph/0201231.
Comment: Evidence in favor of the observation of neutrinoless double-beta decay of 76Ge is claimed, with T1/2 = (0.8-18.3) × 1025 y at 95% CL and best value T1/2 = 1.5 × 1025 y. The corresponding effective neutrino mass is <m> = 0.11-0.56 eV and best value <m> = 0.39 eV. (C.G.).
First evidence for neutrinoless double beta decay, H. V. Klapdor-Kleingrothaus, A. Dietz, I. V. Krivosheina, Part. Nucl. Lett. 110 (2002) 57-79.

3 - -evi - Criticisms

Comment on 'Evidence for Neutrinoless Double Beta Decay', C. E. Aalseth et al., Mod. Phys. Lett. A17 (2002) 1475-1478, arXiv:hep-ex/0202018.
Comment: Critics of prominent members of the Double Beta Decay community to the claim in [Go]. (C.G.).
Neutrino oscillations and signals in beta and 0nu2beta experiments, Ferruccio Feruglio, Alessandro Strumia, Francesco Vissani, Nucl. Phys. B637 (2002) 345-377, arXiv:hep-ph/0201291.

4 - -evi - Talks

Lessons after 3 years of running GENIUS-TF in Gran Sasso, I. V. Krivosheina, H. V. Klapdor-Kleingrothaus (Heidelberg-Moscow and GENIUS), Phys. Scripta T127 (2006) 52-53. 2nd Scandanavian Neutrino Workshop (SNOW 2006), Stockholm, Sweden, 2-6 May 2006.
First Evidence for Neutrinoless Double Beta Decay - and World Status of Double Beta Experiments, Hans Volker Klapdor-Kleingrothaus, arXiv:hep-ph/0512263, 2005. XI Int. Work. on Neutrino Telescopes, Febr. 22-25, 2005, Venice, Italy.
First evidence for neutrinoless double beta decay, with enriched Ge-76 in Gran Sasso 1990-2003, H. V. Klapdor-Kleingrothaus, Nucl. Phys. Proc. Suppl. 143 (2005) 229-232.
Search for neutrinoless double beta decay with enriched ${}^{76}Ge$ in Gran Sasso, H.V. Klapdor-Kleingrothaus, 2004. Neutrino 2004, 13-19 June 2004, Paris, France. http://neutrino2004.in2p3.fr/slides/thursday/Klapdor/klapdor.html.
First Evidence for Neutrinoless Double Beta Decay, H.V. Klapdor-Kleingrothaus, Found. Phys. 33 (2003) 813, arXiv:hep-ph/0302234. Zacatecas Forum in Physics 2002, 11-13 MAY, 2002, Zacatecas, Mexico.

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