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High-$T_{c}$ superconductivity
Previously, motivation for enhanced b -> sg from new flavor physics has centered on discrepancies between theory and experiment. Here two experimental hints are considered: (1) updated measurements of the charm multiplicity and BR(Bbar -> X_{ccbars}) at the Upsilon (4S) imply BR(B -> Xnocha...
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Lenguaje: | eng |
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CERN
1996
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Acceso en línea: | http://cds.cern.ch/record/301454 |
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author | Ott, Hans Rudolf |
author_facet | Ott, Hans Rudolf |
author_sort | Ott, Hans Rudolf |
collection | CERN |
description | Previously, motivation for enhanced b -> sg from new flavor physics has centered on discrepancies between theory and experiment. Here two experimental hints are considered: (1) updated measurements of the charm multiplicity and BR(Bbar -> X_{ccbars}) at the Upsilon (4S) imply BR(B -> Xnocharm}) \approx 12.4 \pm 5.6 %, (2) the Bbar} -> K- X and Bbar -> K+/K- X branching fractions are in excess of conventional Bbar -> Xc -> KX yields by about 16.9 \pm 5.6 % and 18 \pm 5.3 %, respectively. JETSET 7.4 was used to estimate kaon yields from ssbar popping in Bbar -> Xcubard decays. JETSET 7.4 Monte Carlos for BR(Bbar -> Xsg) \sim 15 % imply that the additional kaon production would lead to 1 \sigma agreement with observed charged and neutral kaon yields. The Ks momentum spectrum would be consistent with recent CLEO bounds in the end point region. Search strategies for enhanced b -> sg are discussed in light of large theoretical uncertainty in the standard model fast kaon background from b -> s penguin operators. |
id | cern-301454 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 1996 |
publisher | CERN |
record_format | invenio |
spelling | cern-3014542022-11-03T08:19:06Zhttp://cds.cern.ch/record/301454engOtt, Hans RudolfHigh-$T_{c}$ superconductivityCondensed MatterPreviously, motivation for enhanced b -> sg from new flavor physics has centered on discrepancies between theory and experiment. Here two experimental hints are considered: (1) updated measurements of the charm multiplicity and BR(Bbar -> X_{ccbars}) at the Upsilon (4S) imply BR(B -> Xnocharm}) \approx 12.4 \pm 5.6 %, (2) the Bbar} -> K- X and Bbar -> K+/K- X branching fractions are in excess of conventional Bbar -> Xc -> KX yields by about 16.9 \pm 5.6 % and 18 \pm 5.3 %, respectively. JETSET 7.4 was used to estimate kaon yields from ssbar popping in Bbar -> Xcubard decays. JETSET 7.4 Monte Carlos for BR(Bbar -> Xsg) \sim 15 % imply that the additional kaon production would lead to 1 \sigma agreement with observed charged and neutral kaon yields. The Ks momentum spectrum would be consistent with recent CLEO bounds in the end point region. Search strategies for enhanced b -> sg are discussed in light of large theoretical uncertainty in the standard model fast kaon background from b -> s penguin operators.The lecture series reviews the present status of research investigating superconductors.CERNoai:cds.cern.ch:3014541996 |
spellingShingle | Condensed Matter Ott, Hans Rudolf High-$T_{c}$ superconductivity |
title | High-$T_{c}$ superconductivity |
title_full | High-$T_{c}$ superconductivity |
title_fullStr | High-$T_{c}$ superconductivity |
title_full_unstemmed | High-$T_{c}$ superconductivity |
title_short | High-$T_{c}$ superconductivity |
title_sort | high-$t_{c}$ superconductivity |
topic | Condensed Matter |
url | http://cds.cern.ch/record/301454 |
work_keys_str_mv | AT otthansrudolf hightcsuperconductivity |