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Title: Measurement of mass and width of the excited charmed meson states D{sub 1}{sup 0} and D{sub 2}*{sup 0} at CDF

Abstract

We report on precision measurements of the masses and widths of the narrow, orbitally excited states D{sub 1}{sup 0} and D{sub 2}*{sup 0} using the CDF II detector at the Fermilab Tevatron. Both states (collectively called D**) are reconstructed in the decay channel D**{yields}D*{sup +}{pi}{sup -}. The D{sub 2}*{sup 0} is also reconstructed in the D**{yields}D{sup +}{pi}{sup -} channel. Using a data set with an integrated luminosity of 210 pb{sup -1}, the measured masses and widths for the D{sub 1}{sup 0} are 2421.7{+-}0.7{+-}0.6 MeV/c{sup 2} and 20.0{+-}1.7{+-}1.3 MeV/c{sup 2} respectively, while for the D{sub 2}*{sup 0} they are 2463.3{+-}0.6{+-}0.8 MeV/c{sup 2} and 49.2{+-}2.3{+-}1.2 MeV/c{sup 2}. These values are currently the single best measurements available.

Authors:
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ;  [1]; ;  [2]
  1. University of Illinois, Urbana, Illinois 61801 (United States)
  2. University of Florida, Gainesville, Florida 32611 (United States) (and others)
Publication Date:
OSTI Identifier:
20776820
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. D, Particles Fields; Journal Volume: 73; Journal Issue: 5; Other Information: DOI: 10.1103/PhysRevD.73.051104; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; D*-2010 MESONS; D*2-2460 MESONS; D1-2420 MESONS; EXCITED STATES; FERMILAB COLLIDER DETECTOR; FERMILAB TEVATRON; MEV RANGE; PARTICLE DECAY; PARTICLE IDENTIFICATION; PARTICLE WIDTHS; PIONS MINUS; REST MASS

Citation Formats

Abulencia, A., Budd, S., Chu, P.H., Ciobanu, C.I., Errede, D., Errede, S., Gerberich, H., Grundler, U., Junk, T.R., Kraus, J., Liss, T.M., Marino, C., Pitts, K., Rogers, E., Taffard, A., Veramendi, G., Vickey, T., Zhang, X., Acosta, D., and Cruz, A. Measurement of mass and width of the excited charmed meson states D{sub 1}{sup 0} and D{sub 2}*{sup 0} at CDF. United States: N. p., 2006. Web. doi:10.1103/PhysRevD.73.051104.
Abulencia, A., Budd, S., Chu, P.H., Ciobanu, C.I., Errede, D., Errede, S., Gerberich, H., Grundler, U., Junk, T.R., Kraus, J., Liss, T.M., Marino, C., Pitts, K., Rogers, E., Taffard, A., Veramendi, G., Vickey, T., Zhang, X., Acosta, D., & Cruz, A. Measurement of mass and width of the excited charmed meson states D{sub 1}{sup 0} and D{sub 2}*{sup 0} at CDF. United States. doi:10.1103/PhysRevD.73.051104.
Abulencia, A., Budd, S., Chu, P.H., Ciobanu, C.I., Errede, D., Errede, S., Gerberich, H., Grundler, U., Junk, T.R., Kraus, J., Liss, T.M., Marino, C., Pitts, K., Rogers, E., Taffard, A., Veramendi, G., Vickey, T., Zhang, X., Acosta, D., and Cruz, A. Wed . "Measurement of mass and width of the excited charmed meson states D{sub 1}{sup 0} and D{sub 2}*{sup 0} at CDF". United States. doi:10.1103/PhysRevD.73.051104.
@article{osti_20776820,
title = {Measurement of mass and width of the excited charmed meson states D{sub 1}{sup 0} and D{sub 2}*{sup 0} at CDF},
author = {Abulencia, A. and Budd, S. and Chu, P.H. and Ciobanu, C.I. and Errede, D. and Errede, S. and Gerberich, H. and Grundler, U. and Junk, T.R. and Kraus, J. and Liss, T.M. and Marino, C. and Pitts, K. and Rogers, E. and Taffard, A. and Veramendi, G. and Vickey, T. and Zhang, X. and Acosta, D. and Cruz, A.},
abstractNote = {We report on precision measurements of the masses and widths of the narrow, orbitally excited states D{sub 1}{sup 0} and D{sub 2}*{sup 0} using the CDF II detector at the Fermilab Tevatron. Both states (collectively called D**) are reconstructed in the decay channel D**{yields}D*{sup +}{pi}{sup -}. The D{sub 2}*{sup 0} is also reconstructed in the D**{yields}D{sup +}{pi}{sup -} channel. Using a data set with an integrated luminosity of 210 pb{sup -1}, the measured masses and widths for the D{sub 1}{sup 0} are 2421.7{+-}0.7{+-}0.6 MeV/c{sup 2} and 20.0{+-}1.7{+-}1.3 MeV/c{sup 2} respectively, while for the D{sub 2}*{sup 0} they are 2463.3{+-}0.6{+-}0.8 MeV/c{sup 2} and 49.2{+-}2.3{+-}1.2 MeV/c{sup 2}. These values are currently the single best measurements available.},
doi = {10.1103/PhysRevD.73.051104},
journal = {Physical Review. D, Particles Fields},
number = 5,
volume = 73,
place = {United States},
year = {Wed Mar 01 00:00:00 EST 2006},
month = {Wed Mar 01 00:00:00 EST 2006}
}
  • This paper describes a measurement of the mass and of the width of two neutral narrow resonances D{sub 1}{sup 0} and D*{sub 2}{sup 0}, both composed of a charm quark and an up antiquark. The difference with respect to the well-known resonance D{sup 0}, also neutral and with the same quark composition, is that the two quarks have an orbital momentum 1, which increases their binding energy. Therefore the mass is larger than that of the D{sup 0}. Since the relative orientation of the spin is the same, in the limit of very large charm mass, the masses of thesemore » resonances should be the same; their small difference is predicted by theory and therefore important to measurement to distinguish the different models. These states have been observed in their decay into a kaon and three pions; two of these particles are required to originate from a displaced vertex with respect to the primary interaction vertex, to account for the longer lifetime of the charmed mesons. The resonances parameters have been extracted using a fitting procedure accounting for the expected resonance shape, including effects from detector resolution and background, providing a new best single measurement of the D{sub 1}{sup 0} and D*{sub 2}{sup 0} masses and a competitive measurement of their widths.« less
  • No abstract prepared.
  • Excited states in the N/sup 14/ nucleus were observed by measuring the differential scattering and reaction cross sections of C/sup 12/(d.d)C/sup 12/. C/sup 12/(d,p/sub 0/) C/sup 13/, and C/sup 12/(d,p/s ub 1/)C/sup 13/* for deuteron bombarding energies from 0.5 to 2.0 Mev. Resonances were investigated at 0.92. 1.19. 1.31. 1.446. and 1.79 Mev. corresponding to excited states at 11.05, 11.29, 11.39, 11.503, and 11.80 Mev in N/sup 14/. Seattering matrix analysis of the elastically scattered deuterons and of angular distributions of the reaction protons to the ground state of C/sup 13/ gave assignments of 1/sup +/ , 2/sup -/, 1/supmore » +/, 3/sup +/, and 1/sup +/ for the se states. The analysis of the C/sup 12/(d,p/sub 0/)C/sup 13/ angular distributions at in which the relative proton-neutron spin orientation oi the deuteron is preserved. (auth)« less