Quarkonium Spectroscopy And Search For New States At Babar
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Total Pages | : 3 |
Release | : 2011 |
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Download Quarkonium Spectroscopy And Search for New States at BaBar Book in PDF, Epub and Kindle
The BaBar experiment at the PEP-II B-factory gives excellent opportunities for the quarkonium spectroscopy. Investigation of the properties of new states like the X(3872), Y(3940) and Y(4260) are performed aiming to understand their nature. Recent BaBar results will be presented in this paper. At the B-factories charmonium and charmonium-like states are copiously produced via several mechanisms: in B decay (color suppressed b 2!c transition), double charmonium production (ee− 2!c{bar c} + c{bar c}), two photons production ([gamma]*[gamma]* 2!c{bar c}, where the c{bar c} state has positive C-parity) and in initial state radiation (ISR) when the e{sup {+-}} in its initial state emits a photon lowering the effective center of mass energy of the ee− interaction (e+e− 2![gamma]{sub ISR} + c{bar c}, where the charmonium state has the quantum numbers J{sup PC} = 1−2). Many new states have been recently discovered at the B-factories, BaBar and Belle, above the D{bar D} threshold in the charmonium energy region. While some of them appear to be consistent with conventional c{sub c} states others do not fit with any expectation. Several interpretations for these states have been proposed: for some of them the mass values suggest that they could be conventional charmonia, but also other interpretations like D°{bar D}*° molecule or diquark-antidiquark states among many other models have been advanced. Reviews can be found in Refs. [1][2]. In all cases the picture is not completely clear. This situation could be remedied by a coherent search of the decay pattern to D{bar D}, search for production in two-photon fusion and ISR, and of course improving the statistical precision upon the current measurements. The BaBar experiment at the PEP-II asymmetric collider, designed to perform precision measurement of CP violation in the B meson system, has an extensive quarkonium spectroscopy program. Recent BaBar outcomes on the X(3872) and Y(4260) and a new result on the Y(3940) are reported here.
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Total Pages | : 4 |
Release | : 2007 |
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Download Quarkonium Spectroscopy and New States from BaBar Book in PDF, Epub and Kindle
We review results on charmonium and bottomonium spectroscopy by the BaBar experiment at the PEP-II ee− collider at SLAC. More space is reserved to the new results like the observation of hadronic non-B{bar B} [Upsilon](4S) decays and the investigation on the production and decay properties of the recently discovered charmonium-like states X(3872) and Y (4260). These results are preliminary, unless otherwise specified.
Author | : M. Negrini |
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Total Pages | : 5 |
Release | : 2006 |
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Download Quarkonium Spectroscopy at BaBar Book in PDF, Epub and Kindle
The Babar experiment at the high luminosity storage ring PEP-II offers excellent opportunities in quarkonium spectroscopy. Recent Babar results obtained in this field are reported.
Author | : B.Aa Petersen |
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Total Pages | : 4 |
Release | : 2005 |
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Download Spectroscopy and New Particles in BaBar Book in PDF, Epub and Kindle
Results on charmonium states and searches for pentaquark states at the BABAR experiment are presented.
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Total Pages | : 5 |
Release | : 2013 |
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Download Heavy Quarkonium and Quarkonium-Like States at Belle and BaBar Book in PDF, Epub and Kindle
Author | : S. Ricciardi |
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Total Pages | : 5 |
Release | : 2005 |
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Download Pentaquarks and New Hadron Spectroscopy at BaBar Book in PDF, Epub and Kindle
Recent results on the search for pentaquarks and on charmonium spectroscopy at BABAR are reviewed. The latter includes the observation of the puzzling new state X(3872) {yields} J/{psi} {pi}{sup +} {pi}{sup -} in B decays, and the searches for X(3872) in two-body B decays and initial state radiation events.
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Total Pages | : 8 |
Release | : 2011 |
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Download Quarkonium States at B-Factories Book in PDF, Epub and Kindle
An overview is given on recent progress in the study of quarkonium spectroscopy at the B-factories. In particular, an updated status report is presented of the long list of 'charmonium-like' resonances newly discovered, whose assignment as true charmonium states is in most cases at least controversial. Also, new measurements on the decay properties of bottomonium states above open-B production thresholds are shown. Much of the progress attained in recent years in the study of the quarkonium spectra is owed to the measurements performed at B-factories. The impressive amount of data recorded by the BABAR and Belle experiments has made it possible to study rare decay chains and to look for as yet undiscovered resonances in the charmonium and bottomonium mass regions. Results presented here are based on different subsamples of the full datasets recorded up to now by the two experiments, corresponding to integrated luminosities of about 430 fb−1(BABAR - final) and about 850 fb−1(Belle). Significant contributions also come from the analysis of the various data samples recorded by the CLEO detector.
Author | : Masahiro Kuze |
Publisher | : World Scientific |
Total Pages | : 996 |
Release | : 2007 |
Genre | : Science |
ISBN | : 9812706704 |
Download Deep Inelastic Scattering Book in PDF, Epub and Kindle
These proceedings present the most up-to-date status of deep inelastic scattering (DIS) physics. Topics such as structure function measurements and phenomenology, quantum chromodynamics (QCD) studies in DIS and photoproduction, spin physics and diffractive interactions are reviewed in detail, with emphasis on those studies that push the test of QCD and the Standard Model to the limits of their present range of validity, towards both the very high and the very low four-momentum transfers in leptonproton scattering.
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Total Pages | : 4 |
Release | : 2008 |
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Download New Quarkonium Results from the BABAR Experiment Book in PDF, Epub and Kindle
New BABAR results on B mesons and quarkonia are presented: an analysis of B → X(3872)K+ and B° → X(3872)K° decays with X(3872) → J/??+?−, a precise measurement of the B mass difference?m{sub B} = m(B°) -m(B+) and a study of hadronic transition between? mesons.
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Release | : 1981 |
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Download Quarkonium Spectroscopy Book in PDF, Epub and Kindle
Recent experimental investigations of heavy quark-antiquark bound state systems are reviewed. Results from SPEAR on charmonium spectroscopy and from DORIS and CESR on bottomonium spectroscopy are presented. The current status of the search for top is also discussed.