QCD Sum Rules for the production of the X(3872) as a mixed molecule-charmonium state in B meson decay

We use QCD sum rules to calculate the branching ratio for the production of the meson X(3872) in the decay $B\to X(3872)K$, assumed to be a mixture between charmonium and exotic molecular $[c\bar{q}][q\bar{c}]$ states with $J^{PC}=1^{++}$. We find that in a small range for the values of the mixing angle, $5^\circ\leq\theta\leq13^\circ$, we get the branching ratio ${\mathcal{B}}(B\to XK)=(1.00\pm0.68)\times10^{-5}$, which is in agreement with the experimental upper limit. This result is compatible with the analysis of the mass and decay width of the mode $J/\psi(n\pi)$ and the radiative decay mode $J/\psi\gamma$ performed in the same approach.Comment: 6 pages, 3 figures; revised versions to appear on Phys. Lett.

Study of K0∗(1430)K^*_0(1430) and a0(980)a_0(980) from B→K0∗(1430)πB\to K^*_0(1430)\pi and B→a0(980)KB\to a_0(980)K Decays

We use the decay modes $B \to K^*_0(1430) \pi$ and $B \to a_0(980) K$ to study the scalar mesons $K^*_0(1430)$ and $a_0(980)$ within perturbative QCD framework. For $B \to K^*_0(1430) \pi$, we perform our calculation in two scenarios of the scalar meson spectrum. The results indicate that scenario II is more favored by experimental data than scenario I. The important contribution from annihilation diagrams can enhance the branching ratios about 50% in scenario I, and about 30% in scenario II. The predicted branching ratio of $B \to a_0(980) K$ in scenario I is also less favored by the experiments. The direct CP asymmetries in $B \to K^*_0(1430) \pi$ are small, which are consistent with the present experiments.Comment: More references are added. Published Versio

B→f0(980)K(∗)B\to f_{0}(980) K^{(*)} decays and final state interactions

We study the exclusive decays of $B\to f_{0}(980) K^{(*)}$ in the framework of the perturbative QCD by identifying the $f_{0}(980)$ as the composition of $\bar{s} s$ and $\bar{n}n=(\bar{u}u+\bar{d}d)/\sqrt{2}$. We find that the influence of the $\bar{n} n$ content on the predicted branching ratios is crucial. We discuss the possible rescattering and gluonium states which could enhance the branching ratios of considered decays. We point out that the CP asymmetry in $B\to f_{0}(980) K_{S,L}$ could be a new explorer of $\sin2\phi_{1}$.Comment: 13 pages, 2 figures, Revtex4, final version to appear in Phys. Rev.

Hiv Infection, Hepatitis B And C And Syphilis In Homeless People, In The City Of São Paulo, Brazil

Objetive: To estimate the prevalence of HIV infections, as well as hepatits B and C and syphilis viruses in homeless people. Methods: Cross-sectional study with educational intervention, conducted in the city of São Paulo, between 2002 and 2003. A convenience of homeless people who used night shelters was selected, according to the following criteria: aged 18 or older and not showing psychiatric disturbances. During interviews, sociodemographic and behavioral data were gathered and HIV, hepatitis B and C and syphilis laboratorial tests and post-test counseling were carried out. Results: A total of 330 shelter users participated, with an average age of 40.2 years, 80.9% of them male, having lived on the streets for one year in average. Prevalences of 1.8% for HIV, 8.5% for hepatitis C virus, 30.6% for previous hepatitis B infection, 3.3% for chronic or acute infection by hepatitis B virus, and 5.7% for syphilis. The consistent use of condoms was referred to by 21.3% of interviewees and the use of injecting drugs by 3% of them. Positivity was 10% for HIV and 50% for hepatitis C virus among injectable drug users, versus 1.5% for HIV and 7.3% for hepatitis C among the others, showing an association between the virus and the use of injecting drugs. Previous imprisonment was referred to by 7.9% of women and 26.6% of men, with a prevalence of 2.6% for HIV and 17.1% for hepatitis C virus. Conclusions: The high prevalences of HIV and hepatitis B and C viruses require prevention programs based on vaccination against hepatitis B, early diagnosis of these infections and placement of homeless people into health services.41SUPPL. 24756Allen, D.M., Lehman, J.S., Green, T.A., Lindegren, M.L., Onorato, I.M., Forrester, W., HIV infection among homeless adults and runaway youth, United States, 1989-1992. Field Services Branch (1994) AIDS, 8 (11), pp. 1593-1598Babudieri, S., Longo, B., Sarmati, L., Starnini, G., Dori, L., Suligoi, B., Correlates of HIV, HBV, and HCV infections in a prison inmate population: Results from a multicentre study in Italy (2005) J Med Virol, 76 (3), pp. 311-317Beech, B.M., Myers, L., Beech, D.J., Kernick, N.S., Human immunodeficiency syndrome and hepatitis B and C infections among homeless adolescents (2003) Semin Pediatr Infect Dis, 14 (L), pp. 12-19Cheung, R.C., Hanson, A.K., Maganti, K., Keefe, E.B., Matsui, S.M., Viral Hepatitis and other Infectious Diseases in a Homeless Population (2002) J-Clin Gastroenterol, 34 (4), pp. 476-480Focaccia, R., da Conceição, O.J., Sette Jr, H., Sabino, E., Bassit, L., Nitrini, D.R., Estimated prevalence of viral hepatitis in general population of the municipality of São Paulo, measured by a serologic survey of a stratified, randomized and residence-based population (1998) Braz J Infect Dis, 2 (6), pp. 269-284. , Dec;Haley, R.W., Fischer, R.P., Commercial tattooing as a potentially important source of hepatitis C infection. Clinical epidemiology of 626 consecutive patients unaware of their hepatitis C serologic status (2001) Medicine (Baltimore), 80 (2), pp. 134-151Inciardi, J.A., Surratt, H.L., Kurtz, S.P., HIV, HBV, and HCV infections among drug-involved, inner-city, Street Sex Workers in Miami, Florida (2006) AIDS Behav, 10 (2), pp. 139-147Lopes, F., Latorre, M.R.D.O., Pignatari, A.C.C., Buchalla, C.M., Prevalência de HIV, papilomavírus humano e sífilis na Penitenciária Feminina da Capital, São Paulo, 1997-1998 (2001) Cad Saude Publica, 17 (6), pp. 1473-1480Martins, R.M., Porto, S.O., Vanderborght, B.O.M., Rouzere, C.D., Queiroz, D.A.O., Cardoso, D.D.P., Short report: Prevalence of hepatitis C viral antibody among Brazilian children, adolescents, and street youths (1995) Am J Trop Med Hyg, 53 (6), pp. 654-655McQuillan, G.M., Khare, M., Karon, J.M., Schable, C.A., Vlahov, D., Update on the seroepidemiology of human immunodeficiency virus in the United States, household population: NHANES III, 1988-1994 (1997) J Acquir Immune Defic Syndr Hum Retrovirol, 14 (4), pp. 355-360Nyamathi, A.M., Dixon, E.L., Robbins, W., Smith, C., Wiley, D., Leake, B., Risk factors for hepatitis C virus Infection Among Homeless adults (2002) J Gen Intern Med, 17 (2), pp. 134-143Pavan, M.H.P., Aoki, F.H., Monteiro, D.T., Gonçalves, N.S.L., Escanhoela, C.A.F., Gonçalves Jr, F.L., Viral hepatitis in patients infected with human Immunodeficiency virus (2003) Braz J Infect Dis, 7 (4), pp. 253-261Raoult, D., Foucault, C., Brouqui, P., Infections in the homeless (2001) Lancet Infect Dis, 1 (2), pp. 77-84Robertson, M.J., Clark, R.A., Charlebois, E.D., Tulsky, J., Long, H.L., Bagsberg, D.R., HIV seroprevalence among homeless arid marginally housed adults in San Francisco (2004) Am J Public Health, 94 (7), pp. 1207-1217Roy, E., Haley, N., Leclerc, P., Boivin, J.F., Cédras, L., Vincelette, J., Risk factors for hepatitis C virus infection among street youths (2001) CMAJ, pp. l65. , 5:557-60Roy, E., Haley, N., Lemire, N., Boivin, J.F., Leclerc, P., Vincelette, J., Hepatitis B virus infection among street youths in Montreal (1999) CMAJ, 161 (6), pp. 689-693Samuel, M.C., Doherty, P.M., Bulterys, M., Jenison, S.A., Association between heroin use, needle sharing and tattoos received in prison with hepatitis B and C positivity among street-recruited injecting drug users in New Mexico, USA (2001) Epidemiol Infect, 127 (3), pp. 475-484Sherriff, L.C., Mayon-White, R.T., A survey of hepatitis C prevalence amongst the homeless community of oxford (2003) J Public Health Med, 24 (4), pp. 358-361Stein, J.A., Nyamathi, A., Correlates of Hepatitis C virus infection in homeless men: A latent variable approach (2004) Drug Alcohol Depend, 75 (L), pp. 89-95Stratigos, A.J., Katsambas, A.D., Medical and cutaneous disorders associated with homelessness (2003) Skinmed, 2 (3), pp. l68-l74Szwarcwald CL, Carvalho MF. Estimativa do Número de Indivíduos de 15 a 49 anos infectados pelo HIV, Brasil, 2000. Bol Epidemiol Aids [periódico na internet]. 2001 [Acesso em: 4/4/2006];l4(l). Disponível em: http://www.aids.gov.br/final/ biblioteca/bol_htm/artigo1.htmTorres, R.A., Mani, S., Altholz, J., Brickner, P.W., Human Immunodeficiency virus infection-among homeless men in a New York City shelter. Associalion with Mycobacterium tuberculosis infection (1990) Arch Intern Med, 150 (10), pp. 2030-2036Vieira, M.A.C., Bezerra, E.M.R., Rosa, C.M.M., (2004) População de rua: Quem é, como vive, como é vista, , 3. ed. São Paulo: Hucitec;Zanetta, D.M.T., Strazza, L., Azevedo, R.S., Carvalho, H.B., Massad, E., Menezes, R.X., HIV infection and related risk behaviours in a disadvantaged youth institution of Sao Paulo, Brazil (1999) Int J STD AIDS, 10 (2), pp. 98-10