289 research outputs found
The upper limit of the e+e- partial width of X(3872)
The e+e- decay partial width of the recently observed state, X(3872), is
estimated using the ISR data collected at the center of mass energy 4.03 GeV in
e+e- annihilation experiment by BES at BEPC. It is found that the product of
the e+e- partial width and X(3872) --> pi+ pi- J/psi decay branching fraction
is less than 10 eV at 90 % confidence level if the J(PC) of X(3872) is 1(--).
Together with the potential models and other information, we conclude that
X(3872) is very unlikely to be a vector state.Comment: 5 pages, 1 figur
Crocin from Crocus sativus possesses significant antiproliferation effects on human colorectal cancer cells
Aim: To investigate the anti-proliferative effects of Crocus sativus extract and its major constituent, crocin, on three colorectal cancer cell lines (HCT-116, SW-480, and HT-29). The cell growth inhibition effect was compared to that of non-small cell lung cancer (NSCLC) cells. In addition, Crocus sativusβ effect on non-cancer cells was evaluated. Methods: Using high performance liquid chromatography (HPLC), the purity of crocin and the content of crocin extract were determined. Anti-proliferative effects of Crocus sativus extract and crocin on test cells was evaluated by MTS assay. Results: The purity of crocin was found to be 95.9% and the content of crocin in the extract was 22.9%. Significant concentration-related inhibition effects of the extract on all three colorectal cancer cell lines were observed (P < 0.01). The proliferation was reduced most significantly in HCT-116 cells, to 45.5% at 1.0 mg/ml and to 6.8 % at 3.0 mg/ml. Crocin at 1.0 mM, significantly reduced HCT-116, SW-480, and HT-29 cell proliferation to 2.8%, 52%, and 16.8%, respectively (P < 0.01). Since 3.0 mg/ml Crocus sativus extract contained approximately 0.6 mM crocin, the observed effects suggest that crocin is a major responsible constituent in the extract. Significant anti-proliferative effects were also observed in non-small cell lung cancer cells. However, Crocus sativus extract did not significantly affect the growth of non-cancer young adult mouse colon cells. Conclusion: Data from this study demonstrated that Crocus sativus extract and its major constituent, crocin, significantly inhibited the growth of colorectal cancer cells while not affecting normal cells. Crocus sativus extract should be investigated further as a viable option in the treatment of colorectal cancer.Π¦Π΅Π»Ρ: ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°ΡΡ Π°Π½ΡΠΈΠΏΡΠΎΠ»ΠΈΡΠ΅ΡΠ°ΡΠΈΠ²Π½ΡΠΉ ΡΡΡΠ΅ΠΊΡ ΡΠΊΡΡΡΠ°ΠΊΡΠ° Crocus sativus ΠΈ Π΅Π³ΠΎ Π³Π»Π°Π²Π½ΠΎΠ³ΠΎ Π΄Π΅ΠΉΡΡΠ²ΡΡΡΠ΅Π³ΠΎ Π²Π΅ΡΠ΅ΡΡΠ²Π°, ΠΊΡΠΎΡΠΈΠ½Π°,
Π½Π° ΡΡΠΈ ΠΊΠ»Π΅ΡΠΎΡΠ½ΡΠ΅ Π»ΠΈΠ½ΠΈΠΈ ΠΊΠΎΠ»ΠΎΡΠ΅ΠΊΡΠ°Π»ΡΠ½ΠΎΠ³ΠΎ ΡΠ°ΠΊΠ° ΡΠ΅Π»ΠΎΠ²Π΅ΠΊΠ° (HCT-116, SW-480 ΠΈ HT-29). ΠΡΡΠ΅ΠΊΡ ΠΈΠ½Π³ΠΈΠ±ΠΈΡΠΎΠ²Π°Π½ΠΈΡ ΡΠΎΡΡΠ°
ΠΊΠ»Π΅ΡΠΎΠΊ ΠΎΡΠ΅Π½ΠΈΠ²Π°Π»ΠΈ ΠΏΠΎ ΠΎΡΠ½ΠΎΡΠ΅Π½ΠΈΡ ΠΊ ΡΠ°ΠΊΠΎΠ²ΠΎΠΌΡ Π΄Π»Ρ ΠΊΠ»Π΅ΡΠΎΠΊ Π½Π΅ΠΌΠ΅Π»ΠΊΠΎΠΊΠ»Π΅ΡΠΎΡΠ½ΠΎΠ³ΠΎ ΡΠ°ΠΊΠ° Π»Π΅Π³ΠΊΠΎΠ³ΠΎ (ΠΠΠ Π) ΠΈ Π½Π΅ΠΌΠ°Π»ΠΈΠ³Π½ΠΈΠ·ΠΈΡΠΎΠ²Π°Π½Π½ΡΡ
ΠΊΠ»Π΅ΡΠΎΠΊ. ΠΠ΅ΡΠΎΠ΄Ρ: Π΄Π»Ρ ΠΎΡΠΈΡΡΠΊΠΈ ΠΊΡΠΎΡΠΈΠ½Π° ΠΈ ΡΠΎΡΡΠ°Π²Π»ΡΡΡΠΈΡ
ΡΠΊΡΡΡΠ°ΠΊΡΠ° C. sativus ΠΏΡΠΈΠΌΠ΅Π½ΡΠ»ΠΈ Π²ΡΡΠΎΠΊΠΎΡΡΡΠ΅ΠΊΡΠΈΠ²Π½ΡΡ ΠΆΠΈΠ΄ΠΊΠΎΡΡΠ½ΡΡ
Ρ
ΡΠΎΠΌΠ°ΡΠΎΠ³ΡΠ°ΡΠΈΡ (ΠΠΠΠ₯). ΠΠ½ΡΠΈΠΏΡΠΎΠ»ΠΈΡΠ΅ΡΠ°ΡΠΈΠ²Π½ΡΠΉ ΡΡΡΠ΅ΠΊΡ ΡΠΊΡΡΡΠ°ΠΊΡΠ° ΠΈ ΠΊΡΠΎΡΠΈΠ½Π° ΠΏΠΎ ΠΎΡΠ½ΠΎΡΠ΅Π½ΠΈΡ ΠΊ ΠΊΠ»Π΅ΡΠΊΠ°ΠΌ ΠΎΡΠ΅Π½ΠΈΠ²Π°Π»ΠΈ ΠΏΡΠΈ
ΠΏΠΎΠΌΠΎΡΠΈ MTS-ΡΠ΅ΡΡΠ°. Π Π΅Π·ΡΠ»ΡΡΠ°ΡΡ: ΡΡΠ΅ΠΏΠ΅Π½Ρ ΠΎΡΠΈΡΡΠΊΠΈ ΠΊΡΠΎΡΠΈΠ½Π° ΡΠΎΡΡΠ°Π²Π»ΡΠ»Π° 95,9%, Π° ΡΠΎΠ΄Π΅ΡΠΆΠ°Π½ΠΈΠ΅ ΠΊΡΠΎΡΠΈΠ½Π° Π² ΡΠΊΡΡΡΠ°ΠΊΡΠ΅ β22,9%.
ΠΡΠΌΠ΅ΡΠ°Π»ΠΈ ΡΡΡΠ΅ΡΡΠ²Π΅Π½Π½ΠΎΠ΅ Π΄ΠΎΠ·ΠΎΠ·Π°Π²ΠΈΡΠΈΠΌΠΎΠ΅ ΡΠ³Π½Π΅ΡΠ΅Π½ΠΈΠ΅ ΠΏΡΠΎΠ»ΠΈΡΠ΅ΡΠ°ΡΠΈΠΈ ΠΊΠ»Π΅ΡΠΎΠΊ ΡΡΠ΅Ρ
Π»ΠΈΠ½ΠΈΠΉ ΡΠΊΡΡΡΠ°ΠΊΡΠΎΠΌ C. sativus (P < 0.01). ΠΠ°ΠΈΠ±ΠΎΠ»Π΅Π΅
Π²ΡΡΠ°ΠΆΠ΅Π½Π½ΠΎΠ΅ ΡΠ½ΠΈΠΆΠ΅Π½ΠΈΠ΅ ΠΏΡΠΎΠ»ΠΈΡΠ΅ΡΠ°ΡΠΈΠ²Π½ΠΎΠΉ Π°ΠΊΡΠΈΠ²Π½ΠΎΡΡΠΈ ΠΎΠΎΡΠΌΠ΅ΡΠ°Π»ΠΈ Π΄Π»Ρ ΠΊΠ»Π΅ΡΠΎΠΊ HCT-116 (Π΄o 45,5 % ΠΏΡΠΈ 1,0 ΠΌΠ³/ΠΌΠ» ΠΈ Π΄ΠΎ 6,8 % ΠΏΡΠΈ
3,0 ΠΌΠ³/ΠΌΠ»). ΠΡΠΎΡΠΈΠ½ Π² ΠΊΠΎΠ½ΡΠ΅Π½ΡΡΠ°ΡΠΈΠΈ 1,0 ΠΌM, Π·Π½Π°ΡΠΈΡΠ΅Π»ΡΠ½ΠΎ ΠΈΠ½Π³ΠΈΠ±ΠΈΡΡΠ΅Ρ ΠΏΡΠΎΠ»ΠΈΡΠ΅ΡΠ°ΡΠΈΡ ΠΊΠ»Π΅ΡΠΎΠΊ HCT-116, SW-480 ΠΈ HT-29 (Π΄ΠΎ 2,8,
52 ΠΈ 16,8% ΡΠΎΠΎΡΠ²Π΅ΡΡΡΠ²Π΅Π½Π½ΠΎ, P < 0,01). ΠΠΎΡΠΊΠΎΠ»ΡΠΊΡ 3,0 ΠΌΠ³/ΠΌΠ» ΡΠΊΡΡΡΠ°ΠΊΡΠ° C. sativus ΡΠΎΠ΄Π΅ΡΠΆΠ°Ρ ΠΏΡΠΈΠ±Π»ΠΈΠ·ΠΈΡΠ΅Π»ΡΠ½ΠΎ 0,6 ΠΌM ΠΊΡΠΎΡΠΈΠ½Π°,
ΠΎΡΠΌΠ΅ΡΠ΅Π½Π½ΠΎΠ΅ Π΄Π΅ΠΉΡΡΠ²ΠΈΠ΅ ΠΏΠ΅ΡΠ²ΠΎΠ³ΠΎ ΠΏΠΎΠ΄ΡΠ²Π΅ΡΠΆΠ΄Π°Π΅Ρ ΡΠΎΡ ΡΠ°ΠΊΡ, ΡΡΠΎ ΠΊΡΠΎΡΠΈΠ½ β Π³Π»Π°Π²Π½ΠΎΠ΅ Π΄Π΅ΠΉΡΡΠ²ΡΡΡΠ΅Π΅ Π½Π°ΡΠ°Π»ΠΎ ΡΠΊΡΡΡΠ°ΠΊΡΠ°. Π’Π°ΠΊΠΆΠ΅ ΠΏΠΎΠΊΠ°Π·Π°Π½ΠΎ
ΡΡΡΠ΅ΡΡΠ²Π΅Π½Π½ΠΎΠ΅ Π°Π½ΡΠΈΠΏΡΠΎΠ»ΠΈΡΠ΅ΡΠ°ΡΠΈΠ²Π½ΠΎΠ΅ Π΄Π΅ΠΉΡΡΠ²ΠΈΠ΅ ΠΏΠΎ ΠΎΡΠ½ΠΎΡΠ΅Π½ΠΈΡ ΠΊ ΠΊΠ»Π΅ΡΠΊΠ°ΠΌ ΠΠΠ Π. ΠΠ΄Π½Π°ΠΊΠΎ C. sativus Π½Π΅ ΠΎΠΊΠ°Π·ΡΠ²Π°Π» Π²ΡΡΠ°ΠΆΠ΅Π½Π½ΠΎΠ³ΠΎ
Π΄Π΅ΠΉΡΡΠ²ΠΈΡ Π½Π° ΡΠΎΡΡ Π½Π΅ΠΌΠ°Π»ΠΈΠ³Π½ΠΈΠ·ΠΈΡΠΎΠ²Π°Π½Π½ΡΡ
ΠΊΠ»Π΅ΡΠΎΠΊ ΡΠΎΠ»ΡΡΠΎΠ³ΠΎ ΠΊΠΈΡΠ΅ΡΠ½ΠΈΠΊΠ° ΠΌΠΎΠ»ΠΎΠ΄ΡΡ
ΠΌΡΡΠ΅ΠΉ. ΠΡΠ²ΠΎΠ΄Ρ: Π΄Π°Π½Π½ΡΠ΅ ΠΏΡΠ΅Π΄ΡΡΠ°Π²Π»Π΅Π½Π½ΠΎΠ³ΠΎ
ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡ ΠΏΠΎΠΊΠ°Π·ΡΠ²Π°ΡΡ, ΡΡΠΎ ΡΠΊΡΡΡΠ°ΠΊΡ Crocus sativus ΠΈ Π΅Π³ΠΎ Π³Π»Π°Π²Π½ΡΠΉ Π΄Π΅ΠΉΡΡΠ²ΡΡΡΠΈΠΉ ΠΊΠΎΠΌΠΏΠΎΠ½Π΅Π½Ρ ΠΊΡΠΎΡΠΈΠ½ Π·Π½Π°ΡΠΈΡΠ΅Π»ΡΠ½ΠΎ ΠΈΠ½Π³ΠΈΠ±ΠΈΡΡΡΡ
ΡΠΎΡΡ ΠΊΠ»Π΅ΡΠΎΡΠ½ΡΡ
Π»ΠΈΠ½ΠΈΠΉ ΠΊΠΎΠ»ΠΎΡΠ΅ΠΊΡΠ°Π»ΡΠ½ΠΎΠ³ΠΎ ΡΠ°ΠΊΠ° ΠΈ Π² ΡΠΎ ΠΆΠ΅ Π²ΡΠ΅ΠΌΡ Π½Π΅ Π²Π»ΠΈΡΡΡ Π½Π° ΡΠΎΡΡ Π½ΠΎΡΠΌΠ°Π»ΡΠ½ΡΡ
ΠΊΠ»Π΅ΡΠΎΠΊ. Π Π΄Π°Π»ΡΠ½Π΅ΠΉΡΠ΅ΠΌ ΡΠ»Π΅Π΄ΡΠ΅Ρ
ΠΈΠ·ΡΡΠΈΡΡ Π²ΠΎΠ·ΠΌΠΎΠΆΠ½ΠΎΡΡΡ ΠΏΡΠΈΠΌΠ΅Π½Π΅Π½ΠΈΡ Crocus sativus Π΄Π»Ρ Π»Π΅ΡΠ΅Π½ΠΈΡ Π±ΠΎΠ»ΡΠ½ΡΡ
ΠΊΠΎΠ»ΠΎΡΠ΅ΠΊΡΠ°Π»ΡΠ½ΡΠΌ ΡΠ°ΠΊΠΎΠΌ
Baryon Antibaryon Nonets
The baryon-antibaryon SU(3) nonets are proposed as a scheme to classify the
increased number of experimentally observed enhancements near the baryon
antibaryon mass threshold. The scheme is similar to the Fermi-Yang-Sakata
model, which was put forth about fifty years ago in explaining the mesons
observed at that time. According to the present scheme, many new
baryon-antibaryon bound states are predicted, and their possible productions in
quarkonium decays and B decays are suggested for experimental search.Comment: 5 pages, 1 figur
Relative phase between strong and electromagnetic amplitudes in psi(2S) to 0- 0- decays
With the known branching ratios of psi(2S) to pi+pi- and psi(2S) to K+K-, the
branching ratio of psi(2S) to K0short K0long is calculated as a function of the
relative phase between the strong and the electromagnetic amplitudes of the
psi(2S) decays. The study shows that the branching ratio of psi(2S) to K0short
K0long is sensitive to the relative phase and a measurement of the K0short
K0long branching ratio will shed light on the relative phase determination in
psi(2S) to 0- 0- decays.Comment: 5 pages, 1 figur
The interference between virtual photon and 1-- charmonium in e+e-experiment
e+e- Experiments producing charmonium are reviewed. It is found that the
contribution of the continuum amplitude via virtual photon was neglected in
almost all the experiments and the channels analyzed. It is shown that the
contribution of the continuum part may affect the final results significantly
in psi(2S) and psi(3770) decays, while the interference between continuum and
resonance amplitudes may even affect the J/psi decays as well as the psi(2S)
and psi(3770). This should be considered in analyzing the "rho-pi puzzle"
between J/psi and psi(2s) decays, and the difference between inclusive hadron
and DDbar cross sections in psi(3770) decays.Comment: 6 pages, 2 figure
The Y(4260) as an omega chi_{c1} molecular state
It is suggested that the newly observed Y(4260) by BARBAR collaboration is a
molecular state composed of an omega and a chi_{c1}. Both the production and
decay properties are discussed. A consequence for this molecular state,
Y(4260), is that it decays into pi+pi-pi0 chi_{c1} with similar rate to pi+ pi-
J/psi. It is also expected that Y(4260) -> pi0 pi0 J/psi is produced at half
rate as Y(4260) ->pi+ pi- J/psi. These decay modes should be searched for in
the B factories using initial state radiative return data and B decay data as
well.Comment: 5 pages, 5 figure
Ganoderma lucidum extract inhibits proliferation of SW 480 human colorectal cancer cells
Aim: Ganoderma lucidum is a commonly used Chinese herb and an important ingredient in traditional Chinese medicine herbal formulations for immune dysfunction related illnesses. The effects of this medicinal mushroom on human colorectal cancer cells have not yet been evaluated. In this study, we investigated the effects of Ganoderma lucidum extract using SW 480 human colorectal cancer cell line. Materials and Methods: Two different fractions of Ganoderma lucidum extract, i.e., a fraction containing mainly polysaccharides (GLE-1), and a triterpenoid fraction without polysaccharides (GLE-2) were analyzed. Their antiproliferative activity was evaluated by cell proliferation assay and 3H-thymidine incorporation assay. Scavenging effects of DPPH radical were assessed using ESR-spectroscopy. Results: Our data showed that both GLE-1 and GLE-2 significantly inhibited the proliferation of SW 480 cells. The inhibitory effect of GLE-2 was much stronger than that of GLE-1. GLE-1 inhibited DNA synthesis in the cells and reduced the formation of DPPH radicals. Conclusion: Ganoderma lucidum extract inhibits proliferation of human colorectal cancer cells and possesses antioxidant properties.Π¦Π΅Π»Ρ: Π΄Π»Ρ Π»Π΅ΡΠ΅Π½ΠΈΡ Π·Π°Π±ΠΎΠ»Π΅Π²Π°Π½ΠΈΠΉ, ΡΠ²ΡΠ·Π°Π½Π½ΡΡ
Ρ Π½Π°ΡΡΡΠ΅Π½ΠΈΡΠΌΠΈ ΡΡΠ½ΠΊΡΠΈΠΎΠ½ΠΈΡΠΎΠ²Π°Π½ΠΈΡ ΠΈΠΌΠΌΡΠ½Π½ΠΎΠΉ ΡΠΈΡΡΠ΅ΠΌΡ, Π² ΡΡΠ°Π΄ΠΈΡΠΈΠΎΠ½Π½ΠΎΠΉ ΠΊΠΈΡΠ°ΠΉΡΠΊΠΎΠΉ
ΠΌΠ΅Π΄ΠΈΡΠΈΠ½Π΅ ΡΠ°ΡΡΠΎ ΠΈΡΠΏΠΎΠ»ΡΠ·ΡΡΡ ΠΏΡΠ΅ΠΏΠ°ΡΠ°ΡΡ Π½Π° ΠΎΡΠ½ΠΎΠ²Π΅ Ganoderma lucidum. Π Π΄Π°Π½Π½ΠΎΠΉ ΡΠ°Π±ΠΎΡΠ΅ Π±ΡΠ»ΠΎ ΠΈΠ·ΡΡΠ΅Π½ΠΎ Π²Π»ΠΈΡΠ½ΠΈΠ΅ ΡΠΊΡΡΡΠ°ΠΊΡΠ° Ganoderma
lucidum Π½Π° ΠΊΠ»Π΅ΡΠΊΠΈ ΠΊΠΎΠ»ΠΎΡΠ΅ΠΊΡΠ°Π»ΡΠ½ΠΎΠ³ΠΎ ΡΠ°ΠΊΠ° ΡΠ΅Π»ΠΎΠ²Π΅ΠΊΠ° Π»ΠΈΠ½ΠΈΠΈ SW 480. ΠΠ°ΡΠ΅ΡΠΈΠ°Π»Ρ ΠΈ ΠΌΠ΅ΡΠΎΠ΄Ρ: ΠΈΠ·ΡΡΠ°Π»ΠΈ Π΄Π²Π΅ ΡΡΠ°ΠΊΡΠΈΠΈ ΡΠΊΡΡΡΠ°ΠΊΡΠ°
Ganoderma lucidum: ΡΡΠ°ΠΊΡΠΈΡ GLE-1, ΡΠΎΠ΄Π΅ΡΠΆΠ°ΡΡΡ ΠΏΠΎΠ»ΠΈΡΠ°Ρ
Π°ΡΠΈΠ΄Ρ, ΠΈ ΡΡΠΈΡΠ΅ΡΠΏΠ΅Π½ΠΎΠΈΠ΄Π½ΡΡ ΡΡΠ°ΠΊΡΠΈΡ GLE-2. ΠΡ
ΡΠΎΡΡ-ΠΈΠ½Π³ΠΈΠ±ΠΈΡΡΡΡΡΡ
Π°ΠΊΡΠΈΠ²Π½ΠΎΡΡΡ ΠΎΠΏΡΠ΅Π΄Π΅Π»ΡΠ»ΠΈ Ρ ΠΏΠΎΠΌΠΎΡΡΡ Π°Π½Π°Π»ΠΈΠ·Π° ΠΊΠ»Π΅ΡΠΎΡΠ½ΠΎΠΉ ΠΏΡΠΎΠ»ΠΈΡΠ΅ΡΠ°ΡΠΈΠΈ ΠΈ ΠΏΠΎ Π²ΠΊΠ»ΡΡΠ΅Π½ΠΈΡ 3
H-ΡΠΈΠΌΠΈΠ΄ΠΈΠ½Π°. ΠΠ»Ρ ΠΎΡΠ΅Π½ΠΊΠΈ Π°Π½ΡΠΈΠΎΠΊΡΠΈΠ΄Π°Π½ΡΠ½ΠΎΠΉ
Π°ΠΊΡΠΈΠ²Π½ΠΎΡΡΠΈ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π»ΠΈ ΠΠ‘Π -ΡΠΏΠ΅ΠΊΡΡΠΎΡΠΊΠΎΠΏΠΈΡ. Π Π΅Π·ΡΠ»ΡΡΠ°ΡΡ: ΠΎΠ±Π΅ ΡΡΠ°ΠΊΡΠΈΠΈ Ganoderma lucidum ΠΏΠΎΠ΄Π°Π²Π»ΡΠ»ΠΈ ΠΏΡΠΎΠ»ΠΈΡΠ΅ΡΠ°ΡΠΈΡ ΠΊΠ»Π΅ΡΠΎΠΊ
SW 480. Π ΠΎΡΡ-ΠΈΠ½Π³ΠΈΠ±ΠΈΡΡΡΡΠΈΠΉ ΡΡΡΠ΅ΠΊΡ GLE-2 Π±ΡΠ» Π±ΠΎΠ»Π΅Π΅ Π²ΡΡΠ°ΠΆΠ΅Π½Π½ΡΠΌ, ΡΠ΅ΠΌ ΡΡΠ°ΠΊΡΠΈΠΈ GLE-1. Π€ΡΠ°ΠΊΡΠΈΡ GLE-1 ΠΏΠΎΠ΄Π°Π²Π»ΡΠ»Π° ΡΠΈΠ½ΡΠ΅Π· ΠΠΠ
Π² ΠΊΠ»Π΅ΡΠΊΠ°Ρ
Π»ΠΈΠ½ΠΈΠΈ SW 480 ΠΈ ΠΏΠΎΠ½ΠΈΠΆΠ°Π»Π° ΡΡΠΎΠ²Π΅Π½Ρ ΡΠΎΡΠΌΠΈΡΠΎΠ²Π°Π½ΠΈΡ DPPH ΡΠ°Π΄ΠΈΠΊΠ°Π»ΠΎΠ². ΠΡΠ²ΠΎΠ΄Ρ: ΡΠΊΡΡΡΠ°ΠΊΡ Ganoderma lucidum ΠΏΠΎΠ΄Π°Π²Π»ΡΠ΅Ρ
ΠΏΡΠΎΠ»ΠΈΡΠ΅ΡΠ°ΡΠΈΡ ΠΊΠ»Π΅ΡΠΎΠΊ ΠΊΠΎΠ»ΠΎΡΠ΅ΠΊΡΠ°Π»ΡΠ½ΠΎΠ³ΠΎ ΡΠ°ΠΊΠ° ΡΠ΅Π»ΠΎΠ²Π΅ΠΊΠ° ΠΈ ΠΎΠ±Π»Π°Π΄Π°Π΅Ρ Π°Π½ΡΠΈΠΎΠΊΡΠΈΠ΄Π°Π½ΡΠ½ΡΠΌΠΈ ΡΠ²ΠΎΠΉΡΡΠ²Π°ΠΌΠΈ
The Form Factors of omega pi0 and pi+ pi- at psi(2S)
The measurements of psi(2S) -> omega pi0 and psi(2S) -> pi+ pi- in e+e-
experiments are examined. It is found that the non-resonance virtual photon
annihilation gives large contributions to the observed cross sections of these
two processes. By including this contribution, the form factors and branching
fractions of these two decay modes are revised.Comment: 6 pages, 1 figures(two diagrams), Phys. Lett. B557 (2003) 192-19
Excited heavy tetraquarks with hidden charm
The masses of the excited heavy tetraquarks with hidden charm are calculated
within the relativistic diquark-antidiquark picture. The dynamics of the light
quark in a heavy-light diquark is treated completely relativistically. The
diquark structure is taken into account by calculating the diquark-gluon form
factor. New experimental data on charmonium-like states above open charm
threshold are discussed. The obtained results indicate that X(3872), Y(4260),
Y(4360), Z(4248), Z(4433) and Y(4660) could be tetraquark states with hidden
charm.Comment: 11 page
Determining the upper limit of Gamma_{ee} for the Y(4260)
By fitting the R values between 3.7 and 5.0 GeV measured by the BES
collaboration, the upper limit of the electron width of the newly discovered
resonance Y(4260) is determined to be 580 eV at 90% C.L. Together with the
BABAR measurement on the product of Gamma_{ee} and BR(Y(4260) --> pi+pi-
J/psi), this implies a large decay width of Y(4260) --> pi+pi- J/psi final
states.Comment: 8 pages, 4 figure
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