Measurement of the b-quark fragmentation function in Z0 decays -: art. no. 092006

被引：96

作者：

Abe, K ^{[1
]}

Abe, T

Adam, I

Akimoto, H

Aston, D

Baird, KG

Baltay, C

Band, HR

Barklow, TL

Bauer, JM

Bellodi, G

Berger, R

Blaylock, G

Bogart, JR

Bower, GR

Brau, JE

Breidenbach, M

Bugg, WM

Burke, D

Burnett, TH

Burrows, PN

Calcaterra, A

Cassell, R

Chou, A

Cohn, HO

Coller, JA

Convery, MR

Cook, V

Cowan, RF

Crawford, G

Damerell, CJS

Daoudi, M

de Groot, N

de Sangro, R

Dong, DN

Doser, M

Dubois, R

Erofeeva, I

Eschenburg, V

Etzion, E

Fahey, S

Falciai, D

Fernandez, JP

Flood, K

Frey, R

Hart, EL

Hasuko, K

Hertzbach, SS

Huffer, ME

机构：

[1] Tohoku Univ, Sendai, Miyagi 980, Japan

[2] Aomori Univ, Aomori 030, Japan

[3] Univ Bristol, Bristol, Avon, England

[4] Brunel Univ, Uxbridge UB8 3PH, Middx, England

[5] Boston Univ, Boston, MA 02215 USA

[6] Univ Colorado, Boulder, CO 80309 USA

[7] Colorado State Univ, Ft Collins, CO 80523 USA

[8] Ist Nazl Fis Nucl, Sez Ferrara, I-44100 Ferrara, Italy

[9] Univ Ferrara, I-44100 Ferrara, Italy

[10] Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy

[11] Johns Hopkins Univ, Baltimore, MD 21218 USA

[12] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA

[13] Univ Massachusetts, Amherst, MA 01003 USA

[14] Univ Mississippi, University, MS 38677 USA

[15] MIT, Cambridge, MA 02139 USA

[16] Moscow MV Lomonosov State Univ, Inst Nucl Phys, Moscow 119899, Russia

[17] Nagoya Univ, Chikusa Ku, Nagoya, Aichi 464, Japan

[18] Univ Oregon, Eugene, OR 97403 USA

[19] Univ Oxford, Oxford OX1 3RH, England

[20] Ist Nazl Fis Nucl, Sez Perugia, I-06100 Perugia, Italy

[21] Univ Perugia, I-06100 Perugia, Italy

[22] Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England

[23] Rutgers State Univ, Piscataway, NJ 08855 USA

[24] Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA

[25] Soongsil Univ, Seoul 156743, South Korea

[26] Univ Tennessee, Knoxville, TN 37996 USA

[27] Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA

[28] Univ Calif Santa Cruz, Santa Cruz, CA 95064 USA

[29] Vanderbilt Univ, Nashville, TN 37235 USA

[30] Univ Washington, Seattle, WA 98105 USA

[31] Univ Wisconsin, Madison, WI 53706 USA

[32] Yale Univ, New Haven, CT 06511 USA

来源：

PHYSICAL REVIEW D | 2002年 / 65卷 / 09期

关键词：

D O I：

10.1103/PhysRevD.65.092006

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present a measurement of the b-quark inclusive fragmentation function in Z(0) decays using a novel kinematic B-hadron energy reconstruction technique. The measurement was performed using 350 000 hadronic Z(0) events recorded in the SLD experiment at SLAC between 1997 and 1998. The small and stable SLC beam spot and the charge-coupled-device-based vertex detector were used to reconstruct B-decay vertices with high efficiency and purity, and to provide precise measurements of the kinematic quantities used in this technique. We measured the B energy with good efficiency and resolution over the full kinematic range. We compared the scaled B-hadron energy distribution with models of b-quark fragmentation and with several ad hoc functional forms. A number of models and functions are excluded by the data. The average scaled energy of weakly decaying B hadrons was measured to be [x(b)] = 0.709+/-0.003(stat)+/-0.003(syst)+/-0.002(model).

引用

页码：920061 / 9200612

页数：12

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