Can the minimal supersymmetric standard model with light bottom squark and light gluino survive Z-peak constraints? -: art. no. 111802

被引：32

作者：

Cao, JJ

Xiong, ZH

Yang, JM

机构：

[1] CCAST, World Lab, Beijing 100080, Peoples R China

[2] Henan Normal Univ, Dept Phys, Xinxiang 453002, Henan, Peoples R China

[3] Acad Sinica, Inst Theoret Phys, Beijing 100080, Peoples R China

来源：

PHYSICAL REVIEW LETTERS | 2002年 / 88卷 / 11期

关键词：

D O I：

10.1103/PhysRevLett.88.111802

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

In the framework of the minimal supersymmetric model we examine the Z-peak constraints on the scenario of one light bottom squark (sbottom) (similar to2-5.5 GeV) and light gluino (similar to12-16 GeV) which has been successfully used to explain the excess of bottom quark production in hadron collisions. Such a scenario is found to be severely constrained by the CERN LEP Z-peak observables, especially by R-b, due to the large effect of gluino-sbottom loops. To account for the Rb data in this scenario, the other mass eigenstate of sbottom, i.e., the heavier one, must be lighter than 125 ( 195) GeV at 2sigma(3sigma) level, which, however, is disfavored by CERN LEP II experiments.

引用

页数：4

共 30 条

[1] The b(b)over-bar production cross section and angular correlations in p(p)over-bar collisions at √s = 1.8 TeV [J].

Abbott, B ;

Abolins, M ;

Abramov, V ;

Acharya, BS ;

Adams, DL ;

Adams, M ;

Akimov, V ;

Alves, GA ;

Amos, N ;

Anderson, EW ;

Baarmand, MM ;

Babintsev, VV ;

Babukhadia, L ;

Baden, A ;

Baldin, B ;

Banerjee, S ;

Bantly, J ;

Barberis, E ;

Baringer, P ;

Bartlett, JF ;

Bassler, U ;

Bean, A ;

Belyaev, A ;

Beri, SB ;

Bernardi, G ;

Bertram, I ;

Bezzubov, VA ;

Bhat, PC ;

Bhatnagar, V ;

Bhattacharjee, M ;

Blazey, G ;

Blessing, S ;

Boehnlein, A ;

Bojko, NI ;

Borcherding, F ;

Brandt, A ;

Breedon, R ;

Briskin, G ;

Brock, R ;

Brooijmans, G ;

Bross, A ;

Buchholz, D ;

Buehler, M ;

Buescher, V ;

Burtovoi, VS ;

Butler, JM ;

Canelli, F ;

Carvalho, W ;

Casey, D ;

Casilum, Z .

PHYSICS LETTERS B, 2000, 487 (3-4) :264-272

[2] Cross section for b-jet production in (p)over-barp collisions at √s=1.8 TeV [J].

Abbott, B ;

Abolins, M ;

Abramov, V ;

Acharya, BS ;

Adams, DL ;

Adams, M ;

Alves, GA ;

Amos, N ;

Anderson, EW ;

Baarmand, MM ;

Babintsev, VV ;

Babukhadia, L ;

Baden, A ;

Baldin, B ;

Balm, PW ;

Banerjee, S ;

Bantly, J ;

Barberis, E ;

Baringer, P ;

Bartlett, JF ;

Bassler, U ;

Bean, A ;

Begel, M ;

Belyaev, A ;

Beri, SB ;

Bernardi, G ;

Bertram, I ;

Besson, A ;

Bezzubov, VA ;

Bhat, PC ;

Bhatnagar, V ;

Bhattacharjee, M ;

Blazey, G ;

Blessing, S ;

Boehnlein, A ;

Bojko, NI ;

Borcherding, F ;

Brandt, A ;

Breedon, R ;

Briskin, G ;

Brock, R ;

Brooijmans, G ;

Bross, A ;

Buchholz, D ;

Buehler, M ;

Buescher, V ;

Burtovoi, VS ;

Butler, JM ;

Canelli, F ;

Carvalho, W .

PHYSICAL REVIEW LETTERS, 2000, 85 (24) :5068-5073

[3] MEASUREMENT OF THE B-MESON DIFFERENTIAL CROSS-SECTION D-SIGMA/DP(T) IN P(P)OVER-BAR COLLISIONS AT ROOT-S=1.8 TEV [J].

ABE, F ;

ALBROW, MG ;

AMENDOLIA, SR ;

AMIDEI, D ;

ANTOS, J ;

ANWAYWIESE, C ;

APOLLINARI, G ;

ARETI, H ;

ATAC, M ;

AUCHINCLOSS, P ;

AZFAR, F ;

AZZI, P ;

BACCHETTA, N ;

BADGETT, W ;

BAILEY, MW ;

BAO, J ;

DEBARBARO, P ;

BARBAROGALTIERI, A ;

BARNES, VE ;

BARNETT, BA ;

BARTALINI, P ;

BAUER, G ;

BAUMANN, T ;

BEDESCHI, F ;

BEHRENDS, S ;

BELFORTE, S ;

BELLETTINI, G ;

BELLINGER, J ;

BENJAMIN, D ;

BENLLOCH, J ;

BENSINGER, J ;

BENTON, D ;

BERETVAS, A ;

BERGE, JP ;

BERTOLUCCI, S ;

BHATTI, A ;

BIERY, K ;

BINKLEY, M ;

BIRD, F ;

BISELLO, D ;

BLAIR, RE ;

BLOCKER, C ;

BODEK, A ;

BOKHARI, W ;

BOLOGNESI, V ;

BORTOLETTO, D ;

BOSWELL, C ;

BOULOS, T ;

BRANDENBURG, G ;

BROMBERG, C .

PHYSICAL REVIEW LETTERS, 1995, 75 (08) :1451-1455

[4] MEASUREMENT OF THE BOTTOM-QUARK PRODUCTION CROSS-SECTION USING SEMILEPTONIC DECAY ELECTRONS IN P(P)OVER-BAR COLLISIONS AT ROOT-S = 1.8 TEV [J].

ABE, F ;

ALBROW, M ;

AMIDEI, D ;

ANWAYWIESE, C ;

APOLLINARI, G ;

ATAC, M ;

AUCHINCLOSS, P ;

AUSTERN, M ;

AZZI, P ;

BADEN, AR ;

BACCHETTA, N ;

BADGETT, W ;

BAILEY, MW ;

BAMBERGER, A ;

DEBARBARO, P ;

BARBAROGALTIERI, A ;

BARNES, VE ;

BARNETT, BA ;

BAUER, G ;

BAUMANN, T ;

BEDESCHI, F ;

BEHRENDS, S ;

BELFORTE, S ;

BELLETTINI, G ;

BELLINGER, J ;

BENJAMIN, D ;

BENLLOCH, J ;

BENSINGER, J ;

BERETVAS, A ;

BERGE, JP ;

BERTOLUCCI, S ;

BIERY, K ;

BHADRA, S ;

BINKLEY, M ;

BISELLO, D ;

BLAIR, R ;

BLOCKER, C ;

BODEK, A ;

BOLOGNESI, V ;

BOOTH, AW ;

BOSWELL, C ;

BRANDENBURG, G ;

BROWN, D ;

BUCKLEYGEER, E ;

BUDD, HS ;

BUSETTO, G ;

BYONWAGNER, A ;

BYRUM, KL ;

CAMPAGNARI, C ;

CAMPBELL, M .

PHYSICAL REVIEW LETTERS, 1993, 71 (04) :500-504

[5] J/psi and psi(2S) production in p(p)over-bar collisions at root s=1.8 TeV [J].

Abe, F ;

Akimoto, H ;

Akopian, A ;

Albrow, MG ;

Amendolia, SR ;

Amidei, D ;

Antos, J ;

Aota, S ;

Apollinari, G ;

Asakawa, T ;

Ashmanskas, W ;

Atac, M ;

Azfar, F ;

AzziBacchetta, P ;

Bacchetta, N ;

Badgett, W ;

Bagdasarov, S ;

Bailey, MW ;

Bao, J ;

deBarbaro, P ;

BarbaroGaltieri, A ;

Barnes, VE ;

Barnett, BA ;

Barone, M ;

Barzi, E ;

Bauer, G ;

Baumann, T ;

Bedeschi, F ;

Behrends, S ;

Belforte, S ;

Bellettini, G ;

Bellinger, J ;

Benjamin, D ;

Benlloch, J ;

Bensinger, J ;

Benton, D ;

Beretvas, A ;

Berge, JP ;

Berryhill, J ;

Bertolucci, S ;

Bevensee, B ;

Bhatti, A ;

Biery, K ;

Binkley, M ;

Bisello, D ;

Blair, RE ;

Blocker, C ;

Bodek, A ;

Bokhari, W ;

Bolognesi, V .

PHYSICAL REVIEW LETTERS, 1997, 79 (04) :572-577

[6] Low-energy supersymmetry and the tevatron bottom-quark cross section [J].

Berger, EL ;

Harris, BW ;

Kaplan, DE ;

Sullivan, Z ;

Tait, TMP ;

Wagner, CEM .

PHYSICAL REVIEW LETTERS, 2001, 86 (19) :4231-4234

[7] RADIATIVE-CORRECTIONS TO B(Z-]BBBAR) IN THE MINIMAL SUPERSYMMETRIC STANDARD MODEL [J].

BOULWARE, M ;

FINNELL, D .

PHYSICAL REVIEW D, 1991, 44 (07) :2054-2063

[8]

BROWN HN, HEPEX0009029

[9]

BROWN HN, HEPEX0102017

[10] LIGHT GLUINOS AND UNIFICATION OF COUPLINGS [J].

CARENA, M ;

CLAVELLI, L ;

MATALLIOTAKIS, D ;

NILLES, HP ;

WAGNER, CEM .

PHYSICS LETTERS B, 1993, 317 (03) :346-353

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