Measurement of the ratio of inclusive cross sections $\sigma (p\overline{p} \rightarrow Z + b jet)/ \sigma(p\overline{p}\rightarrow Z + jet)$ at $\sqrt{s}$ = 1.96 TeV

• Published in: Physical review letters 2005, Vol.94, p.161801-1-161801-7
• Main Authors: Abazov, V.M., Abbott, B., Abolins, M., Acharya, B.S., Adams, M., Adams, T., Agelou, M., Agram, J.L., Ahn, S.H., Ahsan, M., Alexeev, G.D., Alkhazov, G., Alton, A., Alverson, G., Alves, G.A., Anastasoaie, M., Anderson, S., Andrieu, B., Arnoud, Y., Askew, A., Asman, B., Atramentov, O., Autermann, C., Avila, C., Badaud, F., Baden, A., Baldin, B., Balm, P.W., Banerjee, S., Barberis, E., Bargassa, P., Baringer, P., Barnes, C., Barreto, J., Bartlett, J.F., Bassler, U., Bauer, D., Bean, A., Beauceron, S., Begel, M., Bellevance, A., Beri, S.B., Bernardi, G., Bernhard, R., Bertram, I., Besancon, M., Beuselinck, R., Bezzubov, V.A., Bhat, P.C., Bhatnagar, V., Binder, M., Black, K.M., Blackler, I., Blazey, G., Blekman, F., Blessing, S., Bloch, D., Blumenschein, U., Boehnlein, A., Boeriu, O., Bolton, T.A., Borcherding, F., Borissov, G., Bos, K., Bose, T., Brandt, A., Brock, R., Brooijmans, G., Bross, A., Buchanan, N.J., Buchholz, D., Buehler, M., Buescher, V., Burdin, S., Burnett, T.H., Busato, Emmanuel, Butler, J.M., Bystricky, J., Carvalho, W., Casey, B.C.K., Cason, N.M., Castilla-Valdez, H., Chakrabarti, S., Chakraborty, D., Chan, K.M., Chandra, A., Chapin, D., Charles, F., Cheu, E., Chevalier, L., Cho, D.K., Choi, S. K., Christiansen, T., Christofek, L., Claes, D., Clément, B., Clément, C., Coadou, Y., Cooke, M., Cooper, W.E.
• Format: Article
• Language: English
• Subjects: High Energy Physics - Experiment; Physics
• ISSN: 0031-9007; 1079-7114
• DOI: 10.1103/PhysRevLett.94.161801

Using the data collected with the DZero detector at sqrt(s)=1.96-TeV, for integrated luminosities of about 180 pb^{-1}, we have measured the ratio of inclusive cross sections for p+pbar->Z+bjet to p+pbar->Z+jet production. The inclusive Z+b-jet reaction is an important background to searches for the Higgs boson in associated ZH production at the Fermilab Tevatron collider. Our measurement is the first of its kind, and relies on the Z->e^+e^- and Z->mu^+mu^- modes. The combined measurement of the ratio yields 0.023 +/- 0.005 for hadronic jets with transverse momenta p_T>20 GeV/c and pseudorapidities |eta|