The heavy hadron spectrum

Davies, C. T. H.

doi:10.1007/bfb0106892

Cited by 7 publications

(7 citation statements)

References 80 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…with U † = ( e (1) , e (2) , e (3) ), where e (i) denotes the i-th eigenvector corresponding to the eigenvalue λ i (t). Inserting the expression Eq.…”

Section: U M (T) Umentioning

confidence: 99%

Excited nucleons with chirally improved fermions

et al. 2004

View full text Add to dashboard Cite

We study positive and negative parity nucleons on the lattice using the chirally improved lattice Dirac operator. Our analysis is based on a set of three operators chi_i with the nucleon quantum numbers but in different representations of the chiral group and with different diquark content. We use a variational method to separate ground state and excited states and determine the mixing coefficients for the optimal nucleon operators in terms of the chi_i. We clearly identify the negative parity resonances N(1535) and N(1650) and their masses agree well with experimental data. The mass of the observed excited positive parity state is too high to be interpreted as the Roper state. Our results for the mixing coefficients indicate that chiral symmetry is important for N(1535) and N(1650) states. We confront our data for the mixing coefficients with quark models and provide insights into the physics of the nucleon system and the nature of strong decays.Comment: Tables added, small modifications in the tex

show abstract

“…with U † = ( e (1) , e (2) , e (3) ), where e (i) denotes the i-th eigenvector corresponding to the eigenvalue λ i (t). Inserting the expression Eq.…”

Section: U M (T) Umentioning

confidence: 99%

Excited nucleons with chirally improved fermions

et al. 2004

View full text Add to dashboard Cite

show abstract

“…The second term accounts for the confinement due to increasing coupling strength. The parameter a is called "string tension" [28]. Apart from the Here U and denote the configurations of gluon and quark fields respectively.…”

Section: Potential Modelsmentioning

confidence: 99%

Measurement of B-Hadron Masses at CDF Run II

Korn¹

2004

View full text Add to dashboard Cite

We measure the mass of b-hadrons in exclusive J/-decay modes. The correct momentum scale is established by the following steps: validate and quantify distortions or systematic effects in the Central Outer Tracker and Silicon Vertex Detector, apply and fine tune the energy loss corrections per track, and finally tune the magnetic field scale. With the momentum scale established, we find: m(B +) = 5279.10 ± 0.41 (stat) 0.36 (sys), m(B°) = 5279.63 ± 0.53 (stat) 0.33 (sys), m(B°) = 5366.01 ± 0.73 (stat) 0.33 (ys), m(Ab) = 5619.7 ± 1.2 (stat) 1.2 (sys) MeV/c 2. Ista Horribilis Taetraque Finita est Passio anonymous The acknowledgment section of every thesis is in a way also an account of that phase in one's life. But compressing the last years into a few pages is of course an impossible task. I would like to thank my advisor Prof. Christoph Paus for giving me the opportunity to come to MIT. I admire him as the hardest working person I know. I would like to thank him and my academic advisor Bolek Wyslouch for their guidance through the rough waters at the institute. I'm indebted to my previous science educators, in particular Prof. Hebbeker, Prof. Keiper and my high school teacher Mr. Mahn. I would like to thank the MIT group for sharing the burden of grad school experience with me. My fellow graduate students Ivan Furic, Konstantin Anikeev, Mike Mulhearn and Sasha Rakitine provided the atmosphere needed, to get the work done. Thanks to the younger students, Alberto Belloni, Arkady Bolshov, Boris Iyutin, Nuno Leonardo and Jeff Miles for freeing my time during the last year, by taking over our hardware responsibilities. David Starr contributed to this work with his undergraduate thesis. Gerry Bauer's broad scientific curiosity was a constant inspiration. From Steve Tether I learned a lot about computing and more Science-Fiction anecdotes than I can remember. I gained more than one insight during discussions with Sham Sumorok. And if you would have paid attention, you too would have noticed his dry British humor as a welcome entertainment at group meetings. Jeff Tseng always had an open door and we talked about physics and beyond. Ilya Kravchenko is not only a good collegue, I consider him a friend. Getting to know the previous generation of the CDF MIT group Prof.

show abstract

“…The κ parameter is called the hopping parameter. It is a simple rescaling factor that is related to the quark mass via κ = 1 2(4 + m) (10) at tree level. An expansion in κ is not useful for light quarks, because of problems with convergence, however for a few specialised applications, it is convenient to expand in terms of κ [39].…”

Section: Basic Lattice Gauge Theorymentioning

confidence: 99%

“…There is physical argument that the Compton wavelength of a hadron should be greater than the lattice spacing. This is a problem for heavy quarks such as charm and bottom, that is usually solved by the use of effective field theories [10,11,21]. The masses of the excited light hadrons are large relative to the inverse lattice spacing, so there may be problems with the continuum extrapolations.…”

Section: Lattice Spacing Errorsmentioning

confidence: 99%

“…I will not discuss flavour singlet mesons as these have been reviewed by Michael [8,9]. There has been much work on the spectroscopy of hadrons that include heavy quarks [10,11,12], however I will not discuss this work. The treatment of heavy quarks (charm and bottom) on the lattice has a different set of problems and opportunities over those for light quarks.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Meson and Baryon Spectroscopy on a Lattice

McNeile

2004

International Review of Nuclear Physics

View full text Add to dashboard Cite

I review the results of hadron spectroscopy calculations from lattice QCD for an intended audience of low energy hadronic physicists. I briefly introduce the ideas of numerical lattice QCD. The various systematic errors, such as the lattice spacing and volume dependence, in lattice QCD calculations are discussed. In addition to the discussion of the properties of ground state hadrons, I also review the small amount of work done on the spectroscopy of excited hadrons and the effect of electromagnetic fields on hadron masses. I also discuss the attempts to understand the physical mechanisms behind hadron mass splittings.Comment: 111 pages, 28 figures, prepared for World Scientific Publishing Company (International Review of Nuclear Physics, Vol. 9, Hadronic Physics from Lattice QCD, edited by A. M. Green

show abstract

The heavy hadron spectrum

Cited by 7 publications

References 80 publications

Excited nucleons with chirally improved fermions

Excited nucleons with chirally improved fermions

Measurement of B-Hadron Masses at CDF Run II

Meson and Baryon Spectroscopy on a Lattice

Contact Info

Product

Resources

About