Results 41 to 50 of about 48,623 (264)

A strange quark plasma [PDF]

Physics World, 2000
MOST physicists and astronomers believe that space, time and all the matter and radiation in the universe was formed during the big bang some 15 billion years ago. A key challenge in physics and astronomy – perhaps the ultimate challenge – is to understand how the universe we live in today evolved from the cosmic fireball created in the big bang As our
Emanuele Quercigh, Johann Rafelski
openaire   +1 more source

Strangelets and strange quark matter [PDF]

Nuclear Physics A, 1998
The properties of finite lumps of strange quark matter (strangelets) with emphasis on the two scenarios of producing strange matter in relativistic heavy ion collisions are summarized. As an outlook, the possibility of short-lived strange composites and charmed matter are discussed for coming heavy ion experiments.
openaire   +2 more sources

Non-perturbative structure of the polarized nucleon sea

, 2003
We investigate the flavour and quark-antiquark structure of the polarized nucleon by calculating the parton distribution functions of the nucleon sea using the meson cloud model. We find that the SU(2) flavor symmetry in the light antiquark sea and quark-
A. I. Signal, A.I. Signal, A.I. Signal, A.W. Schreiber, A.W. Schreiber, A.W. Thomas, A.W. Thomas, B. Adeva, B. Adeva, B. Adeva, B. Adeva, B. Dressler, B. Holzenkamp, C. Boros, D.I. Diakonov, D.I. Diakonov, E.A. Hawker, F.G. Cao, F.G. Cao, F.G. Cao, Fu-Guang Cao, G.T. Garvey, H. Holtmann, J. Ashman, J. Ashman, J. Blumlein, J. Ellis, J. Ellis, K. Abe, K. Ackerstaff, M. Arneodo, M. Arneodo, M. Fukugita, M. Gluck, M. Glück, M. Hirai, P. Amaudraz, P.L. Anthony, P.V. Pobylitsa, R. Machleidt, R.S. Towell, S. Kumano, S.J. Dong, T. DeGrand, W. Melnitchouk, W. Melnitchouk, Y. Goto   +46 more
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Recent progresses in strange quark stars

Frontiers in Astronomy and Space Sciences
According to the hypothesis that strange quark matter may be the true ground state of matter at extremely high densities, strange quark stars should be stable and could exist in the Universe. It is possible that pulsars may actually be strange stars, but
Xiao-Li Zhang, Yong-Feng Huang, Yong-Feng Huang, Ze-Cheng Zou   +3 more
doaj   +1 more source

Consistency between SU(3) and SU(2) covariant baryon chiral perturbation theory for the nucleon mass

Physics Letters B, 2017
Treating the strange quark mass as a heavy scale compared to the light quark mass, we perform a matching of the nucleon mass in the SU(3) sector to the two-flavor case in covariant baryon chiral perturbation theory.
Xiu-Lei Ren, L. Alvarez-Ruso, Li-Sheng Geng, Tim Ledwig, Jie Meng, M.J. Vicente Vacas   +5 more
doaj   +1 more source

Light Quark Masses with Dynamical Wilson Fermions [PDF]

, 1997
We determine the masses of the light and the strange quarks in the $\bar{MS}$-scheme using our high-statistics lattice simulation of QCD with dynamical Wilson fermions. For the light quark mass we find $m^{light}_{\bar{MS}}(2 GeV) = 2.7(2) MeV$, which is
A Spitz, Allton, Allton, Bhattacharya, Bijnens, Conti, G Ritzenhöfer, G Siegert, Gough, Gupta, Güsken, H Hoeber, J Viehoff, K Schilling, Lepage, Leutwyler, Mackenzie, Martinelli, N Eicker, P Lacock, P Ueberholz, S Güsken, Th Lippert, U Glässner   +23 more
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A new window on Strange Quark Matter as the ground state of strongly interacting matter

, 2003
If strange quark matter is the true ground state of matter, it must have lower energy than nuclear matter. Simultaneously, two-flavour quark matter must have higher energy than nuclear matter, for otherwise the latter would convert to the former. We show,
A. Gocksch, A. Manohar, C. Alcock, D. Diakonov, D. Diakonov, Dipankar Bhattacharya, E. Farhi, E. Witten, G. Baym, J. Stern, J. Stern, J.A. McGovern, M. Alford, M. Alford, M. Kutschera, M.C. Birse, M.C. Birse, R. Johnson, S. Kahana, V. Soni, V. Soni, Vikram Soni   +21 more
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Light hadron spectrum in three-flavor QCD with O(a)-improved Wilson quark action [PDF]

, 2003
We report on a calculation of the light hadron spectrum and quark masses in three-flavor dynamical QCD using the non-perturbatively O(a)-improved Wilson quark action and a renormalization-group improved gauge action. Simulations are carried out on a 16^3
:, Aoki, S., Collaboration, JLQCD, CP-PACS, Fukugita, M., Hashimoto, S., Ishikawa, K-I., Ishikawa, T., Ishizuka, N., Iwasaki, Y., Kanaya, K., Kaneko, T., Kuramashi, Y., Okawa, M., Taniguchi, N., Tsutsui, N., Ukawa, A., Yoshie, T.   +17 more
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Heavy hadrons spectra on lattice using NRQCD

EPJ Web of Conferences, 2018
Comparison of radial excitation energies to masses show that the velocity of b quark is very non-relativistic in bottomonium states. In a mixed system like charmed B meson, the b quark has less velocity than it has in bottomonium states and in strange B ...
Mohanta Protick, Basak Subhasish
doaj   +1 more source

Electric transitions of the charmed-strange mesons in a relativistic quark model

European Physical Journal C: Particles and Fields, 2020
In the present work, we adopt a relativistic constituent quark model to depict the charmed strange meson spectroscopy, in which $$D_{s0}(2317)$$ Ds0(2317) and $$D_{s1}(2460)$$ Ds1(2460) are considered as the $$1^3P_0$$ 13P0 and $$1P_1^\prime $$ 1P1 ...
Shao-Feng Chen, Jing Liu, Hai-Qing Zhou, Dian-Yong Chen   +3 more
doaj   +1 more source