Georg Viehhauser: Publications

Search for lepton-flavor-violating decays of B mesons

Physical Review D - Particles, Fields, Gravitation and Cosmology 65:11 (2002) 1111021-1111024

Authors:

KW Edwards, R Ammar, D Besson, X Zhao, S Anderson, VV Frolov, Y Kubota, SJ Lee, SZ Li, R Poling, A Smith, CJ Stepaniak, J Urheim, Z Metreveli, KK Seth, A Tomaradze, P Zweber, S Ahmed, MS Alam, L Jian, M Saleem, F Wappler, E Eckhart, KK Gan, C Gwon, T Hart, K Honscheid, D Hufnagel, H Kagan, R Kass, TK Pedlar, JB Thayer, E von Toerne, T Wilksen, MM Zoeller, H Muramatsu, SJ Richichi, H Severini, P Skubic, SA Dytman, JA Mueller, S Nam, V Savinov, S Chen, JW Hinson, J Lee, DH Miller, V Pavlunin, EI Shibata, IPJ Shipsey, D Cronin-Hennessy, AL Lyon, CS Park, W Park, EH Thorndike, TE Coan, YS Gao, F Liu, Y Maravin, I Narsky, R Stroynowski, M Artuso, C Boulahouache, K Bukin, E Dambasuren, K Khroustalev, R Mountain, R Nandakumar, T Skwarnicki, S Stone, JC Wang, AH Mahmood, SE Csorna, I Danko, Z Xu, G Bonvicini, D Cinabro, M Dubrovin, S McGee, A Bornheim, E Lipeles, SP Pappas, A Shapiro, WM Sun, AJ Weinstein, G Masek, HP Paar, R Mahapatra, RA Briere, GP Chen, T Ferguson, G Tatishvili, H Vogel, NE Adam, JP Alexander, K Berkelman, F Blanc, V Boisvert, DG Cassel, PS Drell

Abstract:

We have searched a sample of 9.6 million BB̄ events for the lepton-flavor-violating decays B→he±μ±, B+→h-e-e+, B+→h-e+μ+, and B+→h-μ-μ+, where h is π, K, p, and K*(892), a total of sixteen modes. We find no evidence for these decays, and place 90% confidence level upper limits on their branching fractions that range from 1.0 to 8.3×10-6.

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Lifetime differences, direct CP violation, and partial widths in D⁰ meson decays to K⁺K^- and π⁺ π^-

Physical Review D - Particles, Fields, Gravitation and Cosmology 65:9 A (2002) 920011-920018

Authors:

SE Csorna, I Danko, KW McLean, Z Xu, R Godang, G Bonvicini, D Cinabro, M Dubrovin, S McGee, A Bornheim, E Lipeles, SP Pappas, A Shapiro, WM Sun, AJ Weinstein, DE Jaffe, R Mahapatra, G Masek, HP Paar, DM Asner, TS Hill, RJ Morrison, HN Nelson, RA Briere, GP Chen, T Ferguson, H Vogel, JP Alexander, C Bebek, K Berkelman, F Blanc, V Boisvert, DG Cassel, PS Drell, JE Duboscq, KM Ecklund, R Ehrlich, L Gibbons, B Gittelman, SW Gray, DL Hartill, BK Heltsley, L Hsu, CD Jones, J Kandaswamy, DL Kreinick, M Lohner, A Magerkurth, H Mahlke-Krüger, TO Meyer, NB Mistry, E Nordberg, M Palmer, JR Patterson, D Peterson, J Pivarski, D Riley, H Schwarthoff, JG Thayer, D Urner, B Valant-Spaight, G Viehhauser, A Warburton, M Weinberger, SB Athar, P Avery, C Prescott, H Stoeck, J Yelton, G Brandenburg, A Ershov, DYJ Kim, R Wilson, K Benslama, BI Eisenstein, J Ernst, GE Gladding, GD Gollin, RM Hans, I Karliner, N Lowrey, MA Marsh, C Plager, C Sedlack, M Selen, JJ Thaler, J Williams, KW Edwards, AJ Sadoff, R Ammar, A Bean, D Besson, X Zhao, S Anderson, VV Frolov, Y Kubota, SJ Lee, R Poling, A Smith, CJ Stepaniak

Abstract:

We describe several measurements using the decays D0→K+K- and π+π-. We find the ratio of partial widths, Γ(D0→K+K-)/Γ (D0→π+π-), to be 2.96±0.16±0.15, where the first error is statistical and the second is systematic. We observe no evidence for direct CP violation, obtaining ACP(KK)=(0.0±2.2±0.8)% and ACP(ππ)=(1.9±3.2±0.8)%. In the limit of no CP violation we measure the mixing parameter yCP=-0.012±0.025±0.014 by measuring the lifetime difference between D0→K+K- or π+ π- and the CP neutral state, D0→K-π+. We see no evidence for mixing.

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Measurement of the masses and widths of the ∑c⁺⁺ and ∑c⁰ charmed baryons

Physical Review D - Particles, Fields, Gravitation and Cosmology 65:7 A (2002) 711011-711014

Authors:

M Artuso, C Boulahouache, K Bukin, E Dambasuren, R Mountain, T Skwarnicki, S Stone, JC Wang, AH Mahmood, SE Csorna, I Danko, Z Xu, G Bonvicini, D Cinabro, M Dubrovin, S McGee, A Bornheim, E Lipeles, SP Pappas, A Shapiro, WM Sun, AJ Weinstein, G Masek, HP Paar, R Mahapatra, RJ Morrison, HN Nelson, RA Briere, GP Chen, T Ferguson, G Tatishvili, H Vogel, NE Adam, JP Alexander, C Bebek, K Berkelman, F Blanc, V Boisvert, DG Cassel, PS Drell, JE Duboscq, KM Ecklund, R Ehrlich, RS Galik, L Gibbons, B Gittelman, SW Gray, DL Hartill, BK Heltsley, L Hsu, CD Jones, J Kandaswamy, DL Kreinick, A Magerkurth, H Mahlke-Krüger, TO Meyer, NB Mistry, E Nordberg, M Palmer, JR Patterson, D Peterson, J Pivarski, D Riley, AJ Sadoff, H Schwarthoff, MR Shepherd, JG Thayer, D Urner, B Valant-Spaight, G Viehhauser, A Warburton, M Weinberger, SB Athar, P Avery, C Prescott, H Stoeck, J Yelton, J Zheng, G Brandenburg, A Ershov, DYJ Kim, R Wilson, K Benslama, BI Eisenstein, J Ernst, GD Gollin, RM Hans, I Karliner, N Lowrey, MA Marsh, C Plager, C Sedlack, M Selen, JJ Thaler, J Williams, KW Edwards, R Ammar, D Besson, X Zhao, S Anderson

Abstract:

Using data recorded by the CLEO II and CLEO II.V detector configurations at CESR, we report new measurements of the masses of the ∑c++ and ∑c0 charmed baryons, and the first measurements of their intrinsic widths. We find M(∑c++)-M(Λc+) =167.4±0.1±0.2 MeV, Γ(∑c++)=2.3±0.2±0.3 MeV, and M(∑c0) -M(Λc+)=167.2±0.1±0.2 MeV, Γ(∑c0)=2.5±0.2±0.3 MeV, where the uncertainties are statistical and systematic, respectively.

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Search for CP violation in τ → Kπντ Decays

Physical Review Letters 88:11 (2002) 1118031-1118035

Authors:

Abstract:

The origin and source of CP violation in fundamental fermion interactions was discussed. The CP violation in Lepton decay was analyzed in the context of a model where the CP symmetry was broken. No evidence of violation was found in lepton decays into the final state. Limits on the imaginary part of the coupling constant were provided describing a relative contribution of the CP violating processes with respect to the standard model. Systematic errors were estimated in order to estimate the limits on CP violating parameter.

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Search for CP violation in tau--> K(pi)nu(tau) decays.

Phys Rev Lett 88:11 (2002) 111803

Authors:

G Bonvicini, D Cinabro, M Dubrovin, S McGee, A Bornheim, E Lipeles, SP Pappas, A Shapiro, WM Sun, AJ Weinstein, G Masek, HP Paar, R Mahapatra, RJ Morrison, RA Briere, GP Chen, T Ferguson, G Tatishvili, H Vogel, NE Adam, JP Alexander, C Bebek, K Berkelman, F Blanc, V Boisvert, DG Cassel, PS Drell, JE Duboscq, KM Ecklund, R Ehrlich, L Gibbons, B Gittelman, SW Gray, DL Hartill, BK Heltsley, L Hsu, CD Jones, J Kandaswamy, DL Kreinick, A Magerkurth, H Mahlke-Krüger, TO Meyer, NB Mistry, E Nordberg, M Palmer, JR Patterson, D Peterson, J Pivarski, D Riley, AJ Sadoff, H Schwarthoff, MR Shepherd, JG Thayer, D Urner, B Valant-Spaight, G Viehhauser, A Warburton, M Weinberger, SB Athar, P Avery, C Prescott, H Stoeck, J Yelton, G Brandenburg, A Ershov, DY-JJ Kim, R Wilson, K Benslama, BI Eisenstein, J Ernst, GD Gollin, RM Hans, I Karliner, N Lowrey, MA Marsh, C Plager, C Sedlack, M Selen, JJ Thaler, J Williams, KW Edwards, R Ammar, D Besson, X Zhao, S Anderson, VV Frolov, Y Kubota, SJ Lee, SZ Li, R Poling, A Smith, CJ Stepaniak, J Urheim, S Ahmed, MS Alam, L Jian, M Saleem, F Wappler, E Eckhart, KK Gan, C Gwon, T Hart, K Honscheid, D Hufnagel, H Kagan, R Kass, TK Pedlar, JB Thayer, E von Toerne, T Wilksen, MM Zoeller, SJ Richichi, H Severini, P Skubic, SA Dytman, S Nam, V Savinov, S Chen, JW Hinson, J Lee, DH Miller, V Pavlunin, EI Shibata, IPJ Shipsey, D Cronin-Hennessy, AL Lyon, CS Park, W Park, EH Thorndike, TE Coan, YS Gao, F Liu, Y Maravin, I Narsky, R Stroynowski, J Ye, M Artuso, C Boulahouache, K Bukin, E Dambasuren, R Mountain, T Skwarnicki, S Stone, JC Wang, AH Mahmood, SE Csorna, I Danko, Z Xu, CLEO Collaboration

Abstract:

We search and find no evidence for CP violation in tau decays into the K(pi)nu(tau) final state. We provide limits on the imaginary part of the coupling constant Lambda describing a relative contribution of the CP violating processes with respect to the standard model to be -0.172

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Georg Viehhauser

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Search for lepton-flavor-violating decays of B mesons

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Lifetime differences, direct CP violation, and partial widths in D⁰ meson decays to K⁺K^- and π⁺ π^-

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Measurement of the masses and widths of the ∑c⁺⁺ and ∑c⁰ charmed baryons

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Search for CP violation in τ → Kπντ Decays

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Search for CP violation in tau--> K(pi)nu(tau) decays.

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Georg Viehhauser

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Search for lepton-flavor-violating decays of B mesons

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Lifetime differences, direct CP violation, and partial widths in D0 meson decays to K+K- and π+ π-

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Measurement of the masses and widths of the ∑c++ and ∑c0 charmed baryons

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Search for CP violation in τ → Kπντ Decays

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Search for CP violation in tau--> K(pi)nu(tau) decays.

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Lifetime differences, direct CP violation, and partial widths in D⁰ meson decays to K⁺K^- and π⁺ π^-

Measurement of the masses and widths of the ∑c⁺⁺ and ∑c⁰ charmed baryons