Measurement of σΛb0/σB¯0×B(Λb0→Λc+π-)/B(B¯0→D+π-) in pp¯Collisions at s=1.96 TeV

Abulencia, A.; Adelman, J.; Affolder, T.; Akimoto, T.; Albrow, M. G.; Ambrose, D.; Amerio, S.; Amidei, D.; Anastassov, A.; Anikeev, K.; Annovi, A.; Antos, J.; Aoki, M.; Apollinari, G.; Arguin, J. -F.; Arisawa, T.; Artikov, A.; Ashmanskas, W.; Attal, A.; Azfar, F.; Azzi-Bacchetta, P.; Azzurri, P.; Bacchetta, N.; Badgett, W.; Barbaro-Galtieri, A.; Barnes, V. E.; Barnett, B. A.; Baroiant, S.; Bartsch, V.; Bauer, G.; Bedeschi, F.; Behari, S.; Belforte, S.; Bellettini, G.; Bellinger, J.; Belloni, A.; Benjamin, D.; Beretvas, A.; Beringer, J.; Berry, T.; Bhatti, A.; Binkley, M.; Bisello, D.; Blair, R. E.; Blocker, C.; Blumenfeld, B.; Bocci, A.; Bodek, A.; Boisvert, V.; Bolla, G.; Bolshov, A.; Bortoletto, D.; Boudreau, J.; Boveia, A.; Brau, B.; Brigliadori, L.; Bromberg, C.; Brubaker, E.; Budagov, J.; Budd, H. S.; Budd, S.; Budroni, S.; Burkett, K.; Busetto, G.; Bussey, P.; Byrum, K. L.; Cabrera, S.; Campanelli, M.; Campbell, M.; Canelli, F.; Canepa, A.; Carillo, S.; Carlsmith, D.; Carosi, R.; Casarsa, M.; Castro, A.; Catastini, P.; Cauz, D.; Cavalli-Sforza, M.; Cerri, A.; Cerrito, L.; Chang, S. H.; Chen, Y. C.; Chertok, M.; Chiarelli, G.; Chlachidze, G.; Chlebana, F.; Cho, I.; Cho, K.; Chokheli, D.; Chou, J. P.; Choudalakis, G.; Chuang, S. H.; Chung, K.; Chung, W. H.; Chung, Y. S.; Ciljak, M.; Ciobanu, C. I.; Ciocci, M. A.; Clark, A.; Clark, D.; Coca, M.; Compostella, G.; Convery, M. E.; Conway, J.; Cooper, B.; Copic, K.; Cordelli, M.; Cortiana, G.; Crescioli, F.; Almenar, C. Cuenca; Cuevas, J.; Culbertson, R.; Cully, J. C.; Cyr, D.; DaRonco, S.; D’Auria, S.; Davies, T.; D’Onofrio, M.; Dagenhart, D.; de Barbaro, P.; Cecco, S. De; Deisher, A.; Lentdecker, G. De; Dell’Orso, M.; Paoli, F. Delli; Demortier, L.; Deng, J.; Deninno, M.; Pedis, D. De; Derwent, P. F.; Giovanni, G. Di; Dionisi, C.; Ruzza, B. Di; Dittmann, J. R.; DiTuro, P.; Dörr, C.; Donati, S.; Donega, M.; Dong, P.; Donini, J.; Dorigo, T.; Dube, S.; Efron, J.; Erbacher, R.; Errede, D.; Errede, S.; Eusebi, R.; Fang, H. C.; Farrington, S.; Fedorko, I.; Fedorko, W. T.; Feild, R. G.; Feindt, M.; Fernandez, J. P.; Field, R.; Flanagan, G.; Foland, A.; Forrester, S.; Foster, G. W.; Franklin, M.; Freeman, J. C.; Furic, I.; Gallinaro, M.; Galyardt, J.; Garcia, J. E.; Garberson, F.; Garfinkel, A. F.; Gay, C.; Gerberich, H.; Gerdes, D.; Giagu, S.; Giannetti, P.; Gibson, A.; Gibson, K.; Gimmell, J. L.; Ginsburg, C.; Giokaris, N.; Giordani, M.; Giromini, P.; Giunta, M.; Giurgiu, G.; Glagolev, V.; Glenzinski, D.; Gold, M.; Goldschmidt, N.; Goldstein, J.; Gomez, G.; Gomez-Ceballos, G.; Goncharov, M.; González, O.; Gorelov, I.; Goshaw, A. T.; Goulianos, K.; Gresele, A.; Griffiths, M.; Grinstein, S.; Grosso-Pilcher, C.; Group, R. C.; Grundler, U.; da Costa, J. Guimaraes; Gunay-Unalan, Z.; Haber, C.; Hahn, K.; Hahn, S. 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S.; Thomson, E.; Tipton, P.; Tiwari, V.; Tkaczyk, S.; Toback, D.; Tokar, S.; Tollefson, K.; Tomura, T.; Tonelli, D.; Torre, S.; Torretta, D.; Tourneur, S.; Trischuk, W.; Tseng, J.; Tsuchiya, R.; Tsuno, S.; Turini, N.; Ukegawa, F.; Unverhau, T.; Uozumi, S.; Usynin, D.; Vallecorsa, S.; van Remortel, N.; Varganov, A.; Vataga, E.; Vázquez, F.; Velev, G.; Veramendi, G.; Veszpremi, V.; Vidal, R.; Vila, I.; Vilar, R.; Vine, T.; Vollrath, I.; Volobouev, I.; Volpi, G.; Würthwein, F.; Wagner, P.; Wagner, R. G.; Wagner, R. L.; Wagner, J.; Wagner, W.; Wallny, R.; Wang, S. M.; Warburton, A.; Waschke, S.; Waters, D.; Wester, W. C.; Whitehouse, B.; Whiteson, D.; Wicklund, A. B.; Wicklund, E.; Williams, G.; Williams, H. H.; Wilson, P.; Winer, B. L.; Wittich, P.; Wolbers, S.; Wolfe, C.; Wright, T.; Wu, X.; Wynne, S. M.; Yagil, A.; Yamamoto, K.; Yamaoka, J.; Yamashita, T.; Yang, C.; Yang, U. K.; Yang, Y. C.; Yao, W. M.; Yeh, G. P.; Yoh, J.; Yorita, K.; Yoshida, T.; Yu, G. B.; Yu, I.; Yu, S. S.; Yun, J. C.; Zanello, L.; Zanetti, A.; Zaw, I.; Zhang, X.; Zhou, J.; Zucchelli, S.

doi:10.1103/physrevlett.98.122002

Measurement of σ Λb0 / σ B¯ 0 ×B( Λb0 → Λc+ π- )/B( B¯ 0 → D+ π- ) in p p¯ Collisions at s =1.96 TeV

Journal Article · Mon Mar 19 00:00:00 EDT 2007 · Physical Review Letters

DOI:https://doi.org/10.1103/physrevlett.98.122002· OSTI ID:892455

Abulencia, A. ^[1]; Adelman, J.; Affolder, T.; Akimoto, T.; Albrow, M. G.; Ambrose, D.; Amerio, S.; Amidei, D.; Anastassov, A.; Anikeev, K.; Annovi, A.; Antos, J.; Aoki, M.; Apollinari, G.; Arguin, J. -F.; Arisawa, T.; Artikov, A.; Ashmanskas, W.; Attal, A.; Azfar, F. more »

Univ. of Illinois at Urbana-Champaign, IL (United States); CDF Collaboration. et al.

Here, we present the first observation of the baryon decay $$Λ^{0}_{b}$$ → $$Λ^{+}_{c}$$$$⁢π^-$ followed by $$Λ^{+}_{c}$$ → $pK^-$$⁢π^+$ in 106 $$pb^{-1}$$ $$p\overline{p}$$ collisions at $$\sqrt{s}$$ =1.96 TeV in the CDF experiment. In order to reduce systematic error, the measured rate for $$Λ^{0}_{b}$$ decay is normalized to the kinematically similar meson decay $$\overline{B}$$$$^0$ → $D^+⁢π^-$ followed by $D^+$ → $π^+K^-⁢π^+$. We report the ratio of production cross sections ($$σ$$) times the ratio of branching fractions ($$\mathscr{B}$$) for the momentum region integrated above $$p_t$$ > 6 GeV/c and pseudorapidity range |$$η$$| < 1.3: $$σ$$⁡($$p\overline{p}$$ → $$Λ^{0}_{b}$$$$X$)/$$σ$$⁡($$p\overline{p}$$ → $$\overline{B}$$$$^0$$X$$) × $$\mathscr{B}$$⁡($$Λ^{0}_{b}$$ → $$Λ^{+}_{c}$$$$⁢π^-$)/$$\mathscr{B}$$⁡($$\overline{B}$$$$^0$ → $D^+⁢π^-$)=0.82±0.08⁢(stat)±0.11⁢(syst)±0.22⁢[$$\mathscr{B}$$($$Λ^{+}_{c}$$ → $pK^-$$⁢π^+$)].

View Accepted Manuscript (DOE)

Research Organization:: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)

Sponsoring Organization:: National Science Foundation (NSF); USDOE

Contributing Organization:: CDF Collaboration

Grant/Contract Number:: AC02-76CH03000

OSTI ID:: 892455

Alternate ID(s):: OSTI ID: 20951118
OSTI ID: 922906

Report Number(s):: FERMILAB-PUB--05-574-E; arXiv eprint number hep-ex/0601003

Journal Information:: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 12 Vol. 98; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Measurement of σ Λb0 / σ B¯ 0 ×B( Λb0 → Λc+ π- )/B( B¯ 0 → D+ π- ) in p p¯ Collisions at s =1.96 TeV

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