118155679
Charmonium and Heavy Flavour Production at LHCb
The underlying mechanism of prompt charmonium production at hadron colliders is a topic of great interest. Measurements of charmonium production at at the Large Hadron Collider beauty (LHCb) experiment for both prompt and secondary J=y(1S) events will be compared with theoretical expectation. Results will also be shown for other charmonium states, and for the upsilon system. The LHCb physics programme relies on the reconstruction of the decays of B and D hadrons. An important first step in this program is to demonstrate that this reconstruction can be done with high efficiency, and to establish the production cross-section for these hadrons in pp collisions at p s = 7 TeV, which is presented here.
120723671
A measurement of the $CP$-violating phase $\phi{_s}$ in the decay $B{^0_s} \to J/\psi\phi$
14509196
Enhanced mixing of intrinsic states in deformed Hf nuclei
Excited low-spin, nonyrast states in {sup 170,172,174}Hf were populated in {beta}{sup +}/{epsilon} decay and studied through off-beam {gamma}-ray spectroscopy. New coincidence data allowed for a substantial revision of the level schemes of {sup 170,172}Hf and a confirmation of the level scheme of {sup 174}Hf. The Hf isotopes represent a unique situation in which a crossing of collective intrinsic excitations occurs, enhancing significantly the effects of mixing. Using branching ratios from excited 2{sup +} states, this mixing is followed and studied. The resulting mixing matrix elements are found to be {approx}30 keV - an order of magnitude larger than estimated previously for nearby nuclei. In the case of {sup 170}Hf, the 2{sub {beta}}{sup +} and 2{sub {gamma}}{sup +} level are shown to be completely mixed.