scholarly journals Exotic hadrons with heavy flavors: X, Y, Z, and related states

2016 ◽  
Vol 2016 (6) ◽  
Author(s):  
Atsushi Hosaka ◽  
Toru Iijima ◽  
Kenkichi Miyabayashi ◽  
Yoshihide Sakai ◽  
Shigehiro Yasui
Keyword(s):  
Heavy Quark ◽  
Chiral Symmetry ◽  
The Past ◽  
Heavy Quark Symmetry ◽  
Theoretical Predictions ◽  
Exotic Hadrons

Abstract In the past decade, exotic hadrons with charm and bottom flavors have been extensively studied both in experiments and in theories. In this review, we provide topical discussions by selecting $X,Y,Z$ particles, to which Belle has made important contributions. These are $X(3872)$, $Y(4260)$, $Z_c(4430)^+$, $Z_c(3900)^+$, $Z_{b}(10610)^+$, and $Z_{b}(10650)^+$. Based on the current experimental observations, we discuss these states with emphasis on the hadronic molecule whose dynamics is governed by chiral symmetry and heavy-quark symmetry of QCD. We also mention briefly various interpretations and some theoretical predictions for the as yet undiscovered exotic hadrons.

scholarly journals HEAVY-QUARK SYMMETRY AND SKYRMIONS

1995 ◽  
Vol 04 (01) ◽  
pp. 47-119 ◽  
Author(s):  
DONG-PIL MIN ◽  
YONGSEOK OH ◽  
BYUNG-YOON PARK ◽  
MANNQUE RHO
Keyword(s):  
Heavy Quark ◽  
Chiral Symmetry ◽  
Heavy Quarks ◽  
The Other ◽  
Finite Mass ◽  
Top Down ◽  
Bottom Up ◽  
Heavy Quark Symmetry ◽  
Heavy Quark Limit ◽  
Work Done

We review recent development on combining heavy-quark symmetry and chiral symmetry in the skyrmion structure of the baryons containing one or more heavy quarks, c (charmed) and b (bottom). We describe two approaches: One going from the chiral symmetry regime of light quarks to the heavy-quark symmetry regime which will be referred to as “bottom-up” approach and the other going down from the heavy-quark limit to the realistic finite-mass regime which will be referred to as “top-down.” A possible hidden connection between the two symmetry limits is suggested. This review is based largely on the work done — some unpublished — by the authors since several years.

scholarly journals Ratios ofB andD meson decay constants with heavy quark symmetry

Pramana ◽  
1996 ◽  
Vol 47 (3) ◽  
pp. 261-261
Author(s):  
A K Giri ◽  
L Maharana ◽  
R Mohanta
Keyword(s):  
Heavy Quark ◽  
Meson Decay ◽  
Decay Constants ◽  
Heavy Quark Symmetry

scholarly journals Non-Relativistic Model for the Semileptonic Λb→Λc Decay

1997 ◽  
Vol 12 (03) ◽  
pp. 195-204 ◽  
Author(s):  
Debrupa Chakraverty ◽  
Triptesh De ◽  
Binayak Dutta-Roy ◽  
K. S. Gupta
Keyword(s):  
Heavy Quark ◽  
Decay Width ◽  
Branching Ratio ◽  
Relativistic Model ◽  
Heavy Quark Symmetry ◽  
Heavy Baryons

We calculate the decay width for [Formula: see text] in the framework of a non-relativistic quark (NRQ) model of heavy baryons where the light quarks play the role of spectators. Our calculation does not make an explicit use of the heavy quark symmetry. The branching ratio for the above process as calculated here agrees reasonably well with the experimental value.

scholarly journals Radiative decay using heavy quark and chiral symmetry

1992 ◽  
Vol 296 (3-4) ◽  
pp. 415-419 ◽  
Author(s):  
James F. Amundson ◽  
C.Glenn Boyd ◽  
Elizabeth Jenkins ◽  
Michael Luke ◽  
Aneesh V. Manohar ◽  
...  
Keyword(s):  
Heavy Quark ◽  
Chiral Symmetry ◽  
Radiative Decay

scholarly journals Impact of background effects on the inclusive Vcb determination

2021 ◽  
Vol 2021 (9) ◽  
Author(s):  
Thomas Mannel ◽  
Muslem Rahimi ◽  
K. Keri Vos
Keyword(s):  
Monte Carlo ◽  
Heavy Quark ◽  
High Precision ◽  
Monte Carlo Methods ◽  
Monte Carlo Data ◽  
Theoretical Predictions ◽  
Experimental Side ◽  
Belle Ii

Abstract The determination of the CKM element Vcb from inclusive semileptonic b → cℓ$$ \overline{\nu} $$ ν ¯ decays has reached a high precision thanks to a combination of theoretical and experimental efforts. Aiming towards even higher precision, we discuss two processes that contaminate the inclusive Vcb determination; the b → u background and the contribution of the tauonic mode: b → c(τ → μν$$ \overline{\nu} $$ ν ¯ )$$ \overline{\nu} $$ ν ¯ . Both of these contributions are dealt with at the experimental side, using Monte-Carlo methods and momentum cuts. However, these contributions can be calculated with high precision within the Heavy-Quark Expansion. In this note, we calculate the theoretical predictions for these two processes. We compare our b → u results qualitatively with generator-level Monte-Carlo data used at Belle and Belle II. Finally, we suggest to change the strategy for the extraction of Vcb by comparing the data on B → Xℓ directly with the theoretical expressions, to which our paper facilitates.

HEAVY QUARK SYMMETRY

B Decays ◽  
1994 ◽  
pp. 231-282 ◽  
Author(s):  
Nathan Isgur ◽  
Mark B. Wise
Keyword(s):  
Heavy Quark ◽  
Heavy Quark Symmetry

Properties of Magnetic Features from the Analysis of Near-Infrared Spectral Lines

1994 ◽  
Vol 154 ◽  
pp. 393-405
Author(s):  
Sami K. Solanki
Keyword(s):  
Near Infrared ◽  
Velocity Structure ◽  
Spectral Lines ◽  
The Past ◽  
Diagnostic Potential ◽  
Theoretical Predictions ◽  
Infrared Spectral ◽  
Magnetic Features

An overview is given of the structure and the physics of magnetic features in solar plages, as derived from observations of near-infrared lines. First, the diagnostic potential of near-infrared lines is compared with that of lines in the visible and at 12 μm. Then, the results on the magnetic and velocity structure of magnetic features obtained from 1.5 μm lines are described, discussed and compared with results of observations in the visible and with theoretical predictions. Finally, the past and present achievements of near-infrared investigations of Zeeman-split lines are summarized.

Factorization and heavy-quark symmetry in hadronicB-meson decays

1993 ◽  
Vol 47 (3) ◽  
pp. 1007-1020 ◽  
Author(s):  
Cathy Reader ◽  
Nathan Isgur
Keyword(s):  
Heavy Quark ◽  
Meson Decays ◽  
Heavy Quark Symmetry
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