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1. B, D and K decays

Author

Buchalla, G., Komatsubara, T. K., Muheim, F., Silvestrini, L., Artuso, M., Asner, D. M., Ball, P., Baracchini, E., Bell, G., Beneke, M., Berryhill, J., Bevan, A., Bigi, I. I., Blanke, M., Bobeth, Ch., Bona, M., Borzumati, F., Browder, T., Buanes, T., Buchmuller, O., Buras, A. J., Burdin, S., Cassel, D. G., Cavanaugh, R., Ciuchini, M., Colangelo, P., Crosetti, G., Dedes, A., De Fazio, F., Descotes-Genon, S., Dickens, J., Dolezal, Z., Durr, S., Egede, U., Eggel, C., Eigen, G., Fajfer, S., Feldmann, Th., Ferrandes, R., Gambino, P., Gershon, T., Gibson, V., Giorgi, M., Gligorov, V. V., Golob, B., Golutvin, A., Grossman, Y., Guadagnoli, D., Haisch, U., Hazumi, M., Heinemeyer, S., Hiller, G., Hitlin, D., Huber, T., Hurth, T., Iijima, T., Ishikawa, A., Isidori, G., Jager, S., Khodjamirian, A., Koppenburg, P., Lagouri, T., Langenegger, U., Lazzeroni, C., Lenz, A., Lubicz, V., Lucha, W., Mahlke, H., Melikhov, D., Mescia, F., Misiak, M., Nakao, M., Napolitano, J., Nikitin, N., Nierste, U., Oide, K., Okada, Y., Paradisi, P., Parodi, F., Patel, M., Petrov, A. A., Pham, T. N., Pierini, M., Playfer, S., Polesello, G., Policicchio, A., Poschenrieder, A., Raimondi, P., Recksiegel, S., Reznicek, P., Robert, A., Robertson, S., Rosner, J. L., Ruggiero, G., Sarti, A., Schneider, O., Schwab, F., Simula, S., Sivoklokov, S., Slavich, P., Smith, C., Smizanska, M., Soni, A., Speer, T., Spradlin, P., Spranger, M., Starodumov, A., Stech, B., Stocchi, A., Stone, S., Tarantino, C., Teubert, F., T'Jampens, S., Toms, K., Trabelsi, K., Trine, S., Uhlig, S., Vagnoni, V., van Hunen, J. J., Weiglein, G., Weiler, A., Wilkinson, G., Xie, Y., Yamauchi, M., Zhu, G., Zupan, J., and Zwicky, R.

Subjects
High Energy Physics - Phenomenology, High Energy Physics - Experiment
Abstract

With the advent of the LHC, we will be able to probe New Physics (NP) up to energy scales almost one order of magnitude larger than it has been possible with present accelerator facilities. While direct detection of new particles will be the main avenue to establish the presence of NP at the LHC, indirect searches will provide precious complementary information, since most probably it will not be possible to measure the full spectrum of new particles and their couplings through direct production. In particular, precision measurements and computations in the realm of flavour physics are expected to play a key role in constraining the unknown parameters of the Lagrangian of any NP model emerging from direct searches at the LHC. The aim of Working Group 2 was twofold: on one hand, to provide a coherent, up-to-date picture of the status of flavour physics before the start of the LHC; on the other hand, to initiate activities on the path towards integrating information on NP from high-pT and flavour data., Comment: Report of Working Group 2 of the CERN Workshop ``Flavour in the era of the LHC'', Geneva, Switzerland, November 2005 -- March 2007

Published
2008
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2. The Beginning of Chiral Symmetry

Author

Kramer, G., Rollnik, H., and Stech, B.

Subjects
Physics - History and Philosophy of Physics, High Energy Physics - Phenomenology
Abstract

For readers interested in the history of chiral symmetry we present the translation of two papaers from 1955 and 1959 from German to English, in which chiral symmetry properties for weak and strong interactions have been postulated and discussed., Comment: 16 pages

Published
2005

3. Width of the J^P=1/2^+ pentaquark in the quark-diquark model

Author

Melikhov, D., Simula, S., and Stech, B.

Subjects
High Energy Physics - Phenomenology, High Energy Physics - Experiment
Abstract

We analyse the width of the $\theta(\frac12^+)$ pentaquark assuming that it is a bound state of two extended spin-zero $ud$-diquarks and the $\bar s$ antiquark (the Jaffe-Wilczek scenario). The width obtained when the size parameters of the pentaquark wave function are taken to be close to the parameters of the nucleon is found to be $\simeq 150$ MeV, i.e. it has a normal value for a $P$-wave hadron decay with the corresponding energy release.However, we found a strong dynamical suppression of the decay width if the pentaquark has an asymmetric "peanut" structure with the strange antiquark in the center and the two diquarks rotating around. In this case a decay width of $\simeq$ 1 MeV is a natural possibility., Comment: 3 new references added, version accepted to Physics Letters B

Published
2004
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4. Proceedings to the Workshops 'What comes beyond the Standard model' 2000,2001, VOLUME 1: Festschrift dedicated to the 60th birthday of Holger Bech Nielsen

Author

Borstnik, N. S. Mankoc, Froggatt, C. D., Lukman, D., Axenides, M., Melikhov, D., Stech, B., Fairlie, D. B., Frampton, P. H., van Holten, J. W., Petersen, J. L., Laperashvili, L. V., Ryzhikh, D. A., Olesen, P., Susskind, L., Blinnikov, S. I., Okun, L. B., Vysotsky, M. I., and Greensite, Jeff

Subjects
High Energy Physics - Phenomenology
Abstract

The present volume is the collection of contributions by friends of Holger Bech Nielsen for his 60th birthday. Contents: 1.Unified internal space of spins and charges (N. Mankoc Borstnik) 2.Semitopological Q-Rings (M. Axenides) 3.Non-local axial anomalies in the Standard model (D. Melikhov, B. Stech) 4.Could there be a fourth generation? (C.D. Froggatt) 5.Another complex Bateman equation (D.B. Fairlie) 6.Non-associative loops for Holger Bech Nielsen (P.H. Frampton) 7.Particles, fluids and vortices (J.W. van Holten) 8.Results on 2D current algebras (J.L. Petersen) 9.Phase transition in gauge theories and the Planck scale physics (L.V. Laperashvili and D.A. Ryzhikh) 10.Some remarks on the 'classical' large N limit (P. Olesen) 11.String theory and the size of hadrons (L. Susskind) 12.Relativity and $c/sqrt3$ (S.I. Blinnikov, L.B. Okun and M.I. Vysotsky) 13.Vortices (Jeff Greensite), Comment: The proceedings includes 13 papers of different authors. Editors were N. S. Mankoc Borstnik, C. D. Froggatt, D. Lukman

Published
2002

5. Non-local anomaly of the axial-vector current for bound states

Author

Melikhov, D. and Stech, B.

Subjects
High Energy Physics - Phenomenology, High Energy Physics - Theory
Abstract

We demonstrate that the amplitude $<\rho\gamma|\partial_\nu (\bar q\gamma_\nu \gamma_5 q)|0>$ does not vanish in the limit of zero quark masses. This represents a new kind of violation of the classical equation of motion for the axial current and should be interpreted as the axial anomaly for bound states. The anomaly emerges in spite of the fact that the one loop integrals are ultraviolet-finite as guaranteed by the presence of the bound-state wave function. As a result, the amplitude behaves like $\sim 1/p^2$ in the limit of a large momentum $p$ of the current. This is to be compared with the amplitude $<\gamma\gamma|\partial_\nu \bar q\gamma_\nu \gamma_5 q|0>$ which remains finite in the limit $p^2\to\infty$. The observed effect leads to the modification of the classical equation of motion of the axial-vector current in terms of the non-local operator and can be formulated as a non-local axial anomaly for bound states., Comment: revtex, 4 pages, numerical value for $\kappa$ in Eq. (19) is corrected, Eqs. (22) and (23) are modified. New references added. Results remain unchanged

Published
2001
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6. Weak annihilation in the rare radiative $B\to \rho\gamma$ decay

Author

Beyer, M., Melikhov, D., Nikitin, N., and Stech, B.

Subjects
High Energy Physics - Phenomenology
Abstract

The ampitude of the $B\to\rho\gamma$ decay induced by the flavour-changing neutral currents contains the penguin contribution and the weak-annihilation contribution generated by the 4-quark operators in the effective Hamiltonian. The penguin contribution is known quite well. We analyse the weak-annihilation which is suppressed by the heavy-quark mass compared to the penguin contribution. In the factorization approximation, the weak annihilation amplitude is represented in terms of the leptonic decay constants and the meson-photon matrix elements of the weak currents. The latter contain the $B\gamma$, $\rho\gamma$ transition form factors and contact terms determined by the equations of motion. We calculate the $B\gamma$ and $\rho\gamma$ form factors within the relativistic dispersion approach and obtain numerical estimates for the weak annihilation amplitude., Comment: revtex, 11 pages

Published
2001
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7. Weak form factors for heavy meson decays: an update

Author

Melikhov, D. and Stech, B.

Subjects
High Energy Physics - Phenomenology
Abstract

We calculate the form factors for weak decays of $B_{(s)}$ and $D_{(s)}$ mesons to light pseudoscalar and vector mesons. To reveal the intimate connection between different decay modes and to be able to perform the calculations in the full physical $q^2$-region we use a relativistic dispersion approach based on the constituent quark picture. This approach gives the form factors as relativistic double spectral representations in terms of the wave functions of the initial and final mesons. The form factors have the correct analytic properties and satisfy general requirements of nonperturbative QCD in the heavy quark limit. The disadvantages of quark models related to ill-defined effective quark masses and not precisely known meson wave functions are reduced by fitting the quark model parameters to lattice QCD results for the $B\to \rho$ transition form factors at large momentum transfers and to the measured total $D\to (K,K^*)l\nu$ decay rates. This allows us to predict numerous form factors for all kinematically accessible $q^2$ values., Comment: revtex, 17 pages, improved version to be published in Phys. Rev. D. Results remain unchanged, but the presentation has been modified: now parametrizations for the form factors $A_0$, $A_1$, $A_2$ etc are given; and estimates of the weak and strong coupling constants of heavy mesons are added; few typoes corrected

Published
2000
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8. Are the neutrino masses and mixings closely related to the masses and mixings of quarks?

Author

Stech, B.

Subjects
High Energy Physics - Phenomenology
Abstract

The mass matrices of quarks have a simple structure if expressed in powers of the small parameter \sigma=(m_c/m_t)^{1/2}. If there is a close relation between quarks and leptons, one would expect similar structures for the lepton matrices which involve the same parameter. To have a specific proposal, the see-saw mechanism is employed together with the stringent requirement that the singlet neutrinos carry non-zero generation charges. These charges then determine the powers of \sigma in the corresponding heavy neutrino mass matrix. As a result, the neutrino mixing matrix turns out to be of the bimaximal type. In addition, the mass splitting of the two lightest neutrinos is found to be tiny, and just of the correct magnitude necessary for the vacuum solution for solar neutrinos., Comment: 8 pages, talk given at the Johns Hopkins workshop, Baltimore, June 1999

Published
1999

9. A simple scheme for masses and mixings of quarks and neutrinos

Author

Stech, B.

Subjects
High Energy Physics - Phenomenology
Abstract

The mass matrices of charged fermions have a simple structure if expressed in powers of the small parameter sigma=(m_c/m_t)^{1/2}. It is suggested that the mass matrix of the three heavy neutrinos occuring in grand unified theories can be expressed in terms of the same parameter. The requirement that these heavy neutrinos carry different U(1) generation quantum numbers gives rise to an almost unique form for this matrix. By applying the see-saw mechanism, the mass splitting of the two lightest neutrinos comes out to be tiny, favoring the vacuum oscillation solution for solar neutrinos. The mixing matrix is of the bimaximal type but contains also CP violating phases., Comment: 9 pages, references added and minor corrections

Published
1999
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10. Mixing and Decay Constants of Pseudoscalar Mesons: The Sequel

Author

Feldmann, T., Kroll, P., and Stech, B.

Subjects
High Energy Physics - Phenomenology
Abstract

We present further tests and applications of the new eta-eta' mixing scheme recently proposed by us. The particle states are decomposed into orthonormal basis vectors in a light-cone Fock representation. Because of flavor symmetry breaking the mixing of the decay constants can be identical to the mixing of particle states at most for a specific choice of this basis. Theoretical and phenomenological considerations show that the quark flavor basis has this property and allows, therefore, for a reduction of the number of mixing parameters. A detailed comparison with other mixing schemes is also presented., Comment: 9 pages

Published
1998
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11. Mixing and Decay Constants of Pseudoscalar Mesons

Author

Feldmann, T., Kroll, P., and Stech, B.

Subjects
High Energy Physics - Phenomenology, High Energy Physics - Experiment, Nuclear Theory
Abstract

We propose a new eta-eta' mixing scheme where we start from the quark flavor basis and assume that the decay constants in that basis follow the pattern of particle state mixing. On exploiting the divergences of the axial vector currents - which embody the axial vector anomaly - all basic parameters are fixed to first order of flavor symmetry breaking. That approach naturally leads to a mass matrix, quadratic in the masses, with specified elements. We also test our mixing scheme against experiment and determine corrections to the first order values of the basic parameters from phenomenology. Finally, we generalize the mixing scheme to include the eta(c). Again the divergences of the axial vector currents fix the mass matrix and, hence, mixing angles and the charm content of the eta and eta'., Comment: 14 pages, uses feynmp.sty

Published
1998
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12. Form Factors for Semi-Leptonic and Radiative Decays of Heavy Mesons to Light Mesons

Author

Stech, B.

Subjects
High Energy Physics - Phenomenology
Abstract

To know and understand form factors of hadronic currents is of decisive importance for analysing exclusive weak decays. The ratios of different form factors of a given process depend on the relativistic spin structure of initial and final particles. It is shown --- assuming simple properties of the spectator particle --- that these ratios can entirely be expresssed in terms of particle and quark mass parameters. For quark masses large compared to the spectator mass the Isgur-Wise relations follow. The corresponding amplitudes for heavy-to-light transitions show a very similar structure. In particular, the $F_0$ and $A_1$ form factors behave again differently from the $F_1, A_2, V$ and $T_1$ form factors., Comment: The definition of the radiative formfactor for the penguin has been changed to a more convenient notation, leading to T_1 = F_1 in the limit of spin symmetry. Additional minor corrections have been applied

Published
1995
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13. Besprechungen

Author

Tamm, K., Stech, B., Schubert, K., Jost, W., Walden, Paul, Musso, H., Dornow, A., Hinsberg, K., Heidermanns, C., Stich, H., and Schwerdtfeger, F.

Published
1955
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14. B, D and K decays: report of Working Group 2 [on Flavour in the Era of the LHC]

Author

Buchalla, G., Komatsubara, T.K., Muheim, F., Silvestrini, L., Artuso, M., Asner, D.M., Ball, P., Baracchini, E., Bell, G., Beneke, M., Berryhill, J., Bevan, A., Bigi, I.I., Blanke, M., Bobeth, Ch., Bona, M., Borzumati, F., Browder, T., Buanes, T., Buchmüller, O., Buras, A.J., Burdin, S., Cassel, D.G., Cavanaugh, R., Ciuchini, M., Colangelo, P., Crosetti, G., Dedes, A., De Fazio, F., Descotes-Genon, S., Dickens, J., Doležal, Z., Dürr, S., Egede, U., Eggel, C., Eigen, G., Fajfer, S., Feldmann, Th., Ferrandes, R., Gambino, P., Gershon, T., Gibson, V., Giorgi, M., Gligorov, V.V., Golob, B., Golutvin, A., Grossman, Y., Guadagnoli, D., Haisch, U., Hazumi, M., Heinemeyer, S., Hiller, G., Hitlin, D., Huber, T., Hurth, T., Iijima, T., Ishikawa, A., Isidori, G., Jäger, S., Khodjamirian, A., Koppenburg, P., Lagouri, T., Langenegger, U., Lazzeroni, C., Lenz, A., Lubicz, V., Lucha, W., Mahlke, H., Melikhov, D., Mescia, F., Misiak, M., Nakao, M., Napolitano, J., Nikitin, N., Nierste, U., Oide, K., Okada, Y., Paradisi, P., Parodi, F., Patel, M., Petrov, A.A., Pham, T.N., Pierini, M., Playfer, S., Polesello, G., Policicchio, A., Poschenrieder, A., Raimondi, P., Recksiegel, S., Řezníček, P., Robert, A., Rosner, J.L., Ruggiero, G., Sarti, A., Schneider, O., Schwab, F., Simula, S., Sivoklokov, S., Slavich, P., Smith, C., Smizanska, M., Soni, A., Speer, T., Spradlin, P., Spranger, M., Starodumov, A., Stech, B., Stocchi, A., Stone, S., Tarantino, C., Teubert, F., T'Jampens, S., Toms, K., Trabelsi, K., Trine, S., Uhlig, S., Vagnoni, V., van Hunen, J.J., Weiglein, G., Weiler, A., Wilkinson, G., Xie, Y., Yamauchi, M., Zhu, G., Zupan, J., and Zwicky, R.

Subjects
Particle Physics - Phenomenology
Abstract

With the advent of the LHC, we will be able to probe New Physics (NP) up to energy scales almost one order of magnitude larger than it has been possible with present accelerator facilities. While direct detection of new particles will be the main avenue to establish the presence of NP at the LHC, indirect searches will provide precious complementary information, since most probably it will not be possible to measure the full spectrum of new particles and their couplings through direct production. In particular, precision measurements and computations in the realm of flavour physics are expected to play a key role in constraining the unknown parameters of the Lagrangian of any NP model emerging from direct searches at the LHC. The aim of Working Group 2 was twofold: on one hand, to provide a coherent, up-to-date picture of the status of flavour physics before the start of the LHC; on the other hand, to initiate activities on the path towards integrating information on NP from high-pT and flavour data. With the advent of the LHC, we will be able to probe New Physics (NP) up to energy scales almost one order of magnitude larger than it has been possible with present accelerator facilities. While direct detection of new particles will be the main avenue to establish the presence of NP at the LHC, indirect searches will provide precious complementary information, since most probably it will not be possible to measure the full spectrum of new particles and their couplings through direct production. In particular, precision measurements and computations in the realm of flavour physics are expected to play a key role in constraining the unknown parameters of the Lagrangian of any NP model emerging from direct searches at the LHC. The aim of Working Group 2 was twofold: on one hand, to provide a coherent, up-to-date picture of the status of flavour physics before the start of the LHC/ on the other hand, to initiate activities on the path towards integrating information on NP from high-pT and flavour data.

Published
2008

15. Besprechungen

Author

Rellich, Sauter, F., Stech, B., Hans, J., Jensen, D., Solf, K., Schumann, H., Witte, E., Koch, A., and Stocker, O.

Published
1954
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16. The CKM Matrix and the Unitarity Triangle: CERN, Geneva, Switzerland 13 - 16 Feb 2002

Author

Abbaneo, D., Ali, A., Amaral, P., Andreev, V., Artuso, M., Barberio, E., Battaglia, M., Bauer, C., Becirevic, D., Beneke, M., Bigi, I., Bozzi, C., Brandt, T., Buchalla, G., Buras, A.J., Calvi, M., Cassel, D., Cirigliano, V., Ciuchini, M., Colangelo, G., Dighe, A., Dubois-Felsmann, G., Eigen, G., Ecklund, K., Faccioli, P., Fleischer, R., Flynn, J., Forty, R., Franco, E., Gagnon, P., Gambino, P., Gupta, R., Hashimoto, S., Hawkings, R., Hitlin, D., Hoang, A., Hocker, A., Hurth, T., Isidori, G., Iijima, T., Jaffe, D., Jamin, M., Keum, Y.Y., Khodjamirian, A., Kim, C.S., Kluit, P., Kronfeld, A., Lacker, H., Laplace, S., Le Diberder, F., Lellouch, L., Lenz, A., Leonidopoulos, C., Le Yaouanc, A., Ligeti, Z., Lin, D., Lopez-Castro, G., Lubicz, V., chesi, D. Luc, Mannel, T., Margoni, M., Martinelli, G., Melikhov, D., Misiak, M., Morénas, V., Moser, H.G., Nierste, U., Ocariz, J., Oliver, L., Parodi, F., Paulini, M., Paus, C., Pe`ne, O., Pierini, M., Porter, F., Pocˇanic, D., Raynal, J.-C., Rosner, J.L., Roudeau, P., Sakai, Y., Schubert, K.R., Schwanda, C., Sciascia, B., Schneider, O., Serfass, B., Silvestrini, L., Smizanska, M., Stark, J., Stech, B., Stocchi, A., Uraltsev, N., Villa, M., Warburton, A., Weiser, C., Wilden, L.H., Wilkinson, G., Willocq, S., and Yamada, N.

Subjects
High Energy Physics::Phenomenology, High Energy Physics::Experiment, General Theoretical Physics, Particle Physics - Phenomenology
Abstract

This report contains the results of the Workshop on the CKM Unitarity Triangle, held at CERN on 13-16 February 2002 to study the determination of the CKM matrix from the available data of K, D, and B physics. This is a coherent document with chapters covering the determination of CKM elements from tree level decays and K and B meson mixing and the global fits of the unitarity triangle parameters. The impact of future measurements is also discussed. This report contains the results of the Workshop on the CKM Unitarity Triangle, held at CERN on 13-16 February 2002 to study the determination of the CKM matrix from the available data of K, D, and B physics. This is a coherent document with chapters covering the determination of CKM elements from tree level decays and K and B meson mixing and the global fits of the unitarity triangle parameters. The impact of future measurements is also discussed.

Published
2003

17. B, D and K decays

Author

Buchalla, G., primary, Komatsubara, T. K., additional, Muheim, F., additional, Silvestrini, L., additional, Artuso, M., additional, Asner, D. M., additional, Ball, P., additional, Baracchini, E., additional, Bell, G., additional, Beneke, M., additional, Berryhill, J., additional, Bevan, A., additional, Bigi, I. I., additional, Blanke, M., additional, Bobeth, Ch., additional, Bona, M., additional, Borzumati, F., additional, Browder, T., additional, Buanes, T., additional, Buchmüller, O., additional, Buras, A. J., additional, Burdin, S., additional, Cassel, D. G., additional, Cavanaugh, R., additional, Ciuchini, M., additional, Colangelo, P., additional, Crosetti, G., additional, Dedes, A., additional, De Fazio, F., additional, Descotes-Genon, S., additional, Dickens, J., additional, Doležal, Z., additional, Dürr, S., additional, Egede, U., additional, Eggel, C., additional, Eigen, G., additional, Fajfer, S., additional, Feldmann, Th., additional, Ferrandes, R., additional, Gambino, P., additional, Gershon, T., additional, Gibson, V., additional, Giorgi, M., additional, Gligorov, V. V., additional, Golob, B., additional, Golutvin, A., additional, Grossman, Y., additional, Guadagnoli, D., additional, Haisch, U., additional, Hazumi, M., additional, Heinemeyer, S., additional, Hiller, G., additional, Hitlin, D., additional, Huber, T., additional, Hurth, T., additional, Iijima, T., additional, Ishikawa, A., additional, Isidori, G., additional, Jäger, S., additional, Khodjamirian, A., additional, Koppenburg, P., additional, Lagouri, T., additional, Langenegger, U., additional, Lazzeroni, C., additional, Lenz, A., additional, Lubicz, V., additional, Lucha, W., additional, Mahlke, H., additional, Melikhov, D., additional, Mescia, F., additional, Misiak, M., additional, Nakao, M., additional, Napolitano, J., additional, Nikitin, N., additional, Nierste, U., additional, Oide, K., additional, Okada, Y., additional, Paradisi, P., additional, Parodi, F., additional, Patel, M., additional, Petrov, A. A., additional, Pham, T. N., additional, Pierini, M., additional, Playfer, S., additional, Polesello, G., additional, Policicchio, A., additional, Poschenrieder, A., additional, Raimondi, P., additional, Recksiegel, S., additional, Řezníček, P., additional, Robert, A., additional, Rosner, J. L., additional, Ruggiero, G., additional, Sarti, A., additional, Schneider, O., additional, Schwab, F., additional, Simula, S., additional, Sivoklokov, S., additional, Slavich, P., additional, Smith, C., additional, Smizanska, M., additional, Soni, A., additional, Speer, T., additional, Spradlin, P., additional, Spranger, M., additional, Starodumov, A., additional, Stech, B., additional, Stocchi, A., additional, Stone, S., additional, Tarantino, C., additional, Teubert, F., additional, T’Jampens, S., additional, Toms, K., additional, Trabelsi, K., additional, Trine, S., additional, Uhlig, S., additional, Vagnoni, V., additional, van Hunen, J. J., additional, Weiglein, G., additional, Weiler, A., additional, Wilkinson, G., additional, Xie, Y., additional, Yamauchi, M., additional, Zhu, G., additional, Zupan, J., additional, and Zwicky, R., additional

Published
2008
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19. Constrained Film Sintering of Nanocrystalline TiO[sub2].

Author

Stech[b], Martin, Reynders[c], Peter, Rodel[a,b], Jurgen, and Scherer, G. W.

Subjects
*SINTERING, *TITANIUM dioxide films, *BULK solids
Abstract

Compares the sintering of nanocrystalline titanium oxide TiO(sub 2) films with the sintering of bulk materials. Grain size, pore size distribution and density; Microstructural evolution during sintering; Continuum mechanical model for the intermediate stage; Effect of grain size to film thickness on densification and grain growth.

Published
2000
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20. CKM elements from tree-level B decays and lifetimes

Author

Barberio, E., Lellouch, L., Schubert, Klaus R., Artuso, M., Battaglia, M., Bauer, C., Becirevic, D., Beneke, M., Bigi, I., Brandt, T., Cassel, D., Calvi, M., Ciuchini, M., Dighe, A., Ecklund, Karl M., Gagnon, P., Paolo Gambino, Hashimoto, S., Hoang, A., Hurth, T., Khodjamirian, A., Kim, C. S., Kronfeld, Andreas S., Lenz, A., Le Yaouanc, A., Ligeti, Z., Lubicz, V., Lucchesi, D., Mannel, T., Margoni, M., Martinelli, G., Melikhov, D., Morenas, V., Moser, H. G., Oliver, L., Pene, O., Raynal, J. C., Roudeau, P., Schwanda, C., Serfass, B., Smizanska, M., Stark, J., Stech, B., Stocchi, A., Uraltsev, N., Warburton, A., Wilden, L. H., Battaglia, Marco, Buras, Andrzej J, Gambino, P, Stocchi, A, Barberio, E, Lellouch, L, Schubert, Kr, Artuso, M, Battaglia, M, Bauer, C, Becirevic, D, Beneke, M, Bigi, I, Brandt, T, Cassel, D, Calvi, M, Ciuchini, M, Dighe, A, Ecklund, K, Gagnon, P, Hashimoto, S, Hoang, A, Hurth, T, Khodjamirian, A, Kim, C, Kronfeld, A, Lenz, A, Le Yaouanc, A, Ligeti, Z, Lubicz, Vittorio, Lucchesi, D, Mannel, T, Margoni, M, Martinelli, G, Melikhov, D, Morenas, V, Moser, Hg, Oliver, L, Pene, O, Raynal, Jc, Roudeau, P, Schwanda, C, Serfass, B, Smizanska, M, Stark, J, Stech, B, Uraltsev, N, Warburton, A, and Wilden, Lh

Subjects
High Energy Physics::Phenomenology, High Energy Physics::Experiment, Particle Physics - Phenomenology
Abstract

This report contains the results of the Workshop on the CKM Unitarity Triangle, held at CERN on 13-16 February 2002 to study the determination of the CKM matrix from the available data of K, D, and B physics. This is a coherent document with chapters covering the determination of CKM elements from tree level decays and K and B meson mixing and the global fits of the unitarity triangle parameters. The impact of future measurements is also discussed.

21. $K^{0}$ decays, unitarity and TCP

Author

Stech, B

Subjects
High Energy Physics::Experiment, Particle Physics - Theory
Abstract

The unitarity and TCP properties of weak decay amplitudes are discussed in the S-matrix approach. The K/sub S/ decay amplitudes are expressed in terms of the K/sub L/ amplitudes. (8 refs).

Published
1972

22. Positron polarization in a mirror transition

Author

Boehm, F., Novey, T. B., Barnes, C. A., Stech, B., Boehm, F., Novey, T. B., Barnes, C. A., and Stech, B.

Abstract

The positron polarization in the mirror transition N13, a predominantly Fermi transition, has been measured by detecting the circular polarization of the annihilation-in-flight quanta. The results indicate complete polarization of the positrons parallel to their momentum, showing that Fermi coupling contributes significantly to the positron polarization in the same sense as the Gamow-Teller coupling.

Published
1957

25. B, D and K decays

Author

M. Yamauchi, T. Lagouri, Athanasios Dedes, Sebastian Jäger, J. van Hunen, G. Wilkinson, Andrzej J. Buras, A. Starodumov, Gino Isidori, P. Raimondi, Federico Mescia, Jure Zupan, Trygve Buanes, Guo-huai Zhu, Maria Smizanska, T. Iijima, F. De Fazio, Pietro Colangelo, Paolo Gambino, Sheldon Stone, Dmitri Melikhov, Roman Zwicky, Antonio Policicchio, Anton Poschenrieder, Ikaros I.Y. Bigi, O. Schneider, J. W. Berryhill, M. Beneke, V. Gibson, D. G. Hitlin, Sven Heinemeyer, C. Lazzeroni, Mario Giorgi, Pavel Reznicek, D. G. Cassel, Ulrich Nierste, Oliver Buchmuller, Katsunobu Oide, C. Eggel, Silvano Simula, M. Ciuchini, Tobias Hurth, G. Hiller, M. Nakao, Tobias Huber, Fabrizio Parodi, T. J. Gershon, Monika Blanke, H. Mahlke, A. Stocchi, Sébastien Descotes-Genon, Konstantin Toms, P. Spradlin, Cecilia Tarantino, F. Teubert, Th. Feldmann, Stefan Recksiegel, Yuval Grossman, V. Vagnoni, Alexander Lenz, Alexey A. Petrov, T. K. Komatsubara, A. Ishikawa, A. Golutvin, Anne Robert, W. Lucha, V. V. Gligorov, Marcella Bona, G. Ruggiero, P. Paradisi, Luca Silvestrini, Yuehong Xie, Ulrik Egede, Patrick Koppenburg, Serguei Sivoklokov, Mikolaj Misiak, Alessandro Sarti, F. Schwab, Yasuhiro Okada, Ulrich Haisch, E. Baracchini, S. Playfer, G. Polesello, F. Muheim, T. Speer, Patricia Ball, Marina Artuso, J. Dickens, Adrian John Bevan, F. Borzumati, Sergey Burdin, Richard Cavanaugh, Stephan Dürr, Maurizio Pierini, S. Fajfer, Ch. Bobeth, K. Trabelsi, Georg Weiglein, Stephane T'Jampens, Giovanni Crosetti, Zdenek Dolezal, Diego Guadagnoli, P. Slavich, G. Bell, Michael Spranger, T. E. Browder, T.N. Pham, G. Eigen, D. M. Asner, M. Patel, C. Smith, Masashi Hazumi, Selma Uhlig, R. Ferrandes, Amarjit Soni, Vittorio Lubicz, Alexander Khodjamirian, Jonathan L. Rosner, S. H. Robertson, Stéphanie Trine, Gerhard Buchalla, Urs Langenegger, Berthold Stech, Andreas Weiler, B. Golob, J. Napolitano, Nikolay Nikitin, Istituto Nazionale di Fisica Nucleare [Sezione di Roma 1] (INFN), Istituto Nazionale di Fisica Nucleare, UND-HEP, University of Notre Dame [Indiana] (UND)-Okayama University, Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), University of Notre Dame [Indiana] (UND), Laboratoire de Physique Théorique d'Orsay [Orsay] (LPT), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Service de Physique Statistique, Magnétisme et Supraconductivité (SPSMS - UMR 9001), Institut Nanosciences et Cryogénie (INAC), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Institut Laue-Langevin (ILL), Department of Biology, Technion - Israel Institute of Technology [Haifa], Istituto Nazionale di Fisica Nucleare, Sezione di Roma 3 (INFN, Sezione di Roma 3), Istituto Nazionale di Fisica Nucleare (INFN), Department of Physics, University of Ljubljana, Jozef Stefan Institute [Ljubljana] (IJS), Système d’Information, conception RobustE des Produits (G-SCOP_SIREP), Laboratoire des sciences pour la conception, l'optimisation et la production (G-SCOP), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Bioinorganique Structurale (LBS), Centre National de la Recherche Scientifique (CNRS), Fédération des Sciences Chimiques de Marseille (FRSCM), Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), European Organization for Nuclear Research (CERN), Laboratori Nazionali di Frascati, Istituto Nazionale di Fisica Nucleare, Sezione di Genova (INFN, Sezione di Genova), Hewlett-Packard Laboratories [Bangalore], Hewlett-Packard, Laboratoire de Mathématiques Appliquées de Lyon (MAPLY), École Centrale de Lyon (ECL), Université de Lyon-Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique Théorique [Palaiseau] (CPHT), École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Corpusculaire - Clermont-Ferrand (LPC), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Machine learning and perception group [Cambridge], Microsoft Research Laboratory Cambridge, Graduate School of Education, University of Bristol [Bristol], Laboratoire Jean Alexandre Dieudonné (JAD), Université Nice Sophia Antipolis (1965 - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Annecy-le-Vieux de Physique Théorique (LAPTH), Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Theory Division, CERN [Genève], Botanique et Modélisation de l'Architecture des Plantes et des Végétations (UMR AMAP), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud]), Department of Psychiatry [Pittsburgh], University of Pittsburgh School of Medicine, Pennsylvania Commonwealth System of Higher Education (PCSHE)-Pennsylvania Commonwealth System of Higher Education (PCSHE), Centre for Studies in Advanced Learning Technology (CSALT), Laboratoire Jacques-Louis Lions (LJLL), Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Network Architectures and Services Group (NAS GROUP), Delft University of Technology (TU Delft), Istituto Nazionale di Fisica Nucleare, Sezione di Bologna (INFN, Sezione di Bologna), University of Edinburgh, École Polytechnique de Montréal (EPM), university of Notre Dame du Lac-Okayama University [Okayama], Laboratoire d'Annecy de Physique des Particules (LAPP/Laboratoire d'Annecy-le-Vieux de Physique des Particules), Université Grenoble Alpes (UGA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes (UGA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), ILL, National Institute for Nuclear Physics (INFN), J. Stefan Institute, Ljubljana, SIREP (G-SCOP_SIREP), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU), Université Nice Sophia Antipolis (... - 2019) (UNS), Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS), Muheim, F., Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes (UGA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes (UGA), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11), Institut National Polytechnique de Grenoble (INPG)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut National Polytechnique de Grenoble (INPG)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF), École Centrale de Marseille (ECM)-Aix Marseille Université (AMU)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X), Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Institut National de la Recherche Agronomique (INRA)-Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut de Recherche pour le Développement (IRD [France-Sud]), Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA), Buchalla, G, Komatsubara, Tk, Muheim, F, Silvestrini, L, Artuso, M, Asner, Dm, Ball, P, Baracchini, E, Bell, G, Beneke, M, Berryhill, J, Bevan, A, Bigi, Ii, Blanke, M, Bobeth, C, Bona, M, Borzumati, F, Browder, T, Buanes, T, Buchmuller, O, Buras, Aj, Burdin, S, Cassel, Dg, Cavanaugh, R, Ciuchini, M, Colangelo, P, Crosetti, G, Dedes, A, De Fazio, F, Descotes Genon, S, Dickens, J, Dolezal, Z, Durr, S, Egede, U, Eggel, C, Eigen, G, Fajfer, S, Feldmann, T, Ferrandes, R, Gambino, P, Gershon, T, Gibson, V, Giorgi, M, Gligorov, Vv, Golob, B, Golutvin, A, Grossman, Y, Guadagnoli, D, Haisch, U, Hazumi, M, Heinemeyer, S, Hiller, G, Hitlin, D, Huber, T, Hurth, T, Iijima, T, Ishikawa, A, Isidori, G, Jager, S, Khodjamirian, A, Koppenburg, P, Lagouri, T, Langenegger, U, Lazzeroni, C, Lenz, A, Lubicz, Vittorio, Lucha, W, Mahlke, H, Melikhov, D, Mescia, F, Misiak, M, Nakao, M, Napolitano, J, Nikitin, N, Nierste, U, Oide, K, Okada, Y, Paradisi, P, Parodi, F, Patel, M, Petrov, Aa, Pham, Tn, Pierini, M, Playfer, S, Polesello, G, Policicchio, A, Poschenrieder, A, Raimondi, P, Recksiegel, S, Reznicek, P, Robert, A, Rosner, Jl, Ruggiero, G, Sarti, A, Schneider, O, Schwab, F, Simula, S, Sivoklokov, S, Slavich, P, Smith, C, Smizanska, M, Soni, A, Speer, T, Spradlin, P, Spranger, M, Starodumov, A, Stech, B, Stocchi, A, Stone, S, Tarantino, Cecilia, Teubert, F, T'Jampens, S, Toms, K, Trabelsi, K, Trine, S, Uhlig, S, Vagnoni, V, van Hunen, Jj, Weiglein, G, Weiler, A, Wilkinson, G, Xie, Y, Yamauchi, M, Zhu, G, Zupan, J, and Zwicky, R.

Subjects
Physics, Particle physics, Large Hadron Collider, Physics and Astronomy (miscellaneous), 010308 nuclear & particles physics, Computation, Physics beyond the Standard Model, Flavour, Measure (physics), 01 natural sciences, Physique des Hautes Energies - Phénoménologie, High Energy Physics - Experiment, Direct production, High Energy Physics - Phenomenology, [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph], 0103 physical sciences, Path (graph theory), 010306 general physics, Engineering (miscellaneous), Order of magnitude, QC
Abstract

With the advent of the LHC, we will be able to probe New Physics (NP) up to energy scales almost one order of magnitude larger than it has been possible with present accelerator facilities. While direct detection of new particles will be the main avenue to establish the presence of NP at the LHC, indirect searches will provide precious complementary information, since most probably it will not be possible to measure the full spectrum of new particles and their couplings through direct production. In particular, precision measurements and computations in the realm of flavour physics are expected to play a key role in constraining the unknown parameters of the Lagrangian of any NP model emerging from direct searches at the LHC. The aim of Working Group 2 was twofold: on one hand, to provide a coherent, up-to-date picture of the status of flavour physics before the start of the LHC; on the other hand, to initiate activities on the path towards integrating information on NP from high-pT and flavour data., Comment: Report of Working Group 2 of the CERN Workshop ``Flavour in the era of the LHC'', Geneva, Switzerland, November 2005 -- March 2007

Published
2008

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