W± production and single-spin asymmetries in polarized (p)over-right-arrow + p collisions at √s=500 GeV at STAR

被引：0

作者：

Wissink, Scott W. ^{[1
]}

机构：

[1] Indiana Univ, Bloomington, IN 47408 USA

来源：

INTERNATIONAL NUCLEAR PHYSICS CONFERENCE 2010 (INPC2010): HADRON STRUCTURE | 2011年 / 312卷

关键词：

D O I：

10.1088/1742-6596/312/3/032018

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

W boson production in longitudinally polarized p+p collisions provides a clean and novel probe of the flavor dependence of (sea) light anti-quark polarization distributions in the nucleon. The W+(-) are produced in leading order via u + (d) over bar (d + (u) over bar) fusion, and can be studied through detection of their decay charged leptons. The STAR Time Projection Chamber (TPC) provides excellent charged particle tracking at mid-rapidity, and allowed for robust e(+)/e(-) separation for PT up to similar to 50 GeV/c in this measurement. Electromagnetic calorimeters (EMCs) determine the precise lepton energy. The large acceptances of the STAR TPC and EMC systems cover most of the decay lepton (e(+/-)) phase space, and allow for strict isolation conditions to be imposed on the lepton, while also enabling a veto on substantial away-side energy. These two requirements reduce the 'QCD' background by several orders of magnitude, resulting in clean yield extraction. Preliminary results for the W+ and W- production cross sections and parity-violating single-spin asymmetries A(L), obtained from the 2009 data set at root s = 500 GeV, are presented.

引用

页数：6

共 50 条

[11] Transverse single-spin asymmetries of midrapidity π0 and η mesons in polarized p plus p collisions at √s=200 GeV
Acharya, U. A.
Aidala, C.
Akiba, Y.
Alfred, M.
Andrieux, V
Apadula, N.
Asano, H.
Azmoun, B.
Babintsev, V
Bandara, N. S.
Barish, K. N.
Bathe, S.
Bazilevsky, A.
Beaumier, M.
Belmont, R.
Berdnikov, A.
Berdnikov, Y.
Bichon, L.
Blankenship, B.
Blau, D. S.
Bok, J. S.
Borisov, V
Brooks, M. L.
Bryslawskyj, J.
Bumazhnov, V
Campbell, S.
Roman, V. Canoa
Cervantes, R.
Chi, C. Y.
Chiu, M.
Choi, I. J.
Choi, J. B.
Citron, Z.
Connors, M.
Corliss, R.
Cronin, N.
Csanad, M.
Csorgo, T.
Danley, T. W.
Daugherity, M. S.
David, G.
DeBlasio, K.
Dehmelt, K.
Denisov, A.
Deshpande, A.
Desmond, E. J.
Dion, A.
Dixit, D.
Do, J. H.
Drees, A.
PHYSICAL REVIEW D, 2021, 103 (05)
[12] How to measure the parity of the Θ+ in (p)over-right-arrow(p)over-right-arrow collisions
Hanhart, C
Büscher, M
Eyrich, W
Kilian, K
Meissner, UG
Rathmann, F
Sibirtsev, A
Ströher, H
PHYSICS LETTERS B, 2004, 590 (1-2) : 39 - 44
[13] STUDIES OF SPIN OBSERVABLES IN ((P)OVER-RIGHT-ARROW,(P)OVER-RIGHT-ARROW') AND ((P)OVER-RIGHT-ARROW,P'GAMMA) REACTIONS AT INTERMEDIATE ENERGIES
WISSINK, SW
NUCLEAR PHYSICS A, 1994, 577 (1-2) : C27 - C32
[14] Measurement of transverse single-spin asymmetries for J/ψ production in polarized p + p collisions at √s = 200 GeV (vol 82, 112008, 2010)
Adare, A.
Afanasiev, S.
Aidala, C.
Ajitanand, N. N.
Akiba, Y.
Al-Bataineh, H.
Alexander, J.
Al-Ta'ani, H.
Angerami, A.
Aoki, K.
Apadula, N.
Aphecetche, L.
Aramaki, Y.
Asai, J.
Atomssa, E. T.
Averbeck, R.
Awes, T. C.
Azmoun, B.
Babintsev, V.
Bai, M.
Baksay, G.
Baksay, L.
Baldisseri, A.
Barish, K. N.
Barnes, P. D.
Bassalleck, B.
Basye, A. T.
Bathe, S.
Batsouli, S.
Baublis, V.
Baumann, C.
Bazilevsky, A.
Belikov, S.
Belmont, R.
Bennett, R.
Berdnikov, A.
Berdnikov, Y.
Bhom, J. H.
Bickley, A. A.
Blau, D. S.
Boissevain, J. G.
Bok, J. S.
Borel, H.
Borggren, N.
Boyle, K.
Brooks, M. L.
Buesching, H.
Bumazhnov, V.
Bunce, G.
Butsyk, S.
PHYSICAL REVIEW D, 2012, 86 (09):
[15] Recent STAR Results on W Boson Production in Polarized p plus p Collisions at √s=500 GeV
Balewski, Jan
19TH PARTICLES AND NUCLEI INTERNATIONAL CONFERENCE (PANIC11), 2012, 1441 : 252 - 254
[16] Cross Section and Parity-Violating Spin Asymmetries of W± Boson Production in Polarized p plus p Collisions at √s=500 Gev
Adare, A.
Afanasiev, S.
Aidala, C.
Ajitanand, N. N.
Akiba, Y.
Akimoto, R.
Alexander, J.
Al-Ta'ani, H.
Andrews, K. R.
Angerami, A.
Aoki, K.
Apadula, N.
Appelt, E.
Aramaki, Y.
Armendariz, R.
Aschenauer, E. C.
Awes, T. C.
Azmoun, B.
Babintsev, V.
Bai, M.
Bannier, B.
Barish, K. N.
Bassalleck, B.
Basye, A. T.
Bathe, S.
Baublis, V.
Baumann, C.
Bazilevsky, A.
Belmont, R.
Ben-Benjamin, J.
Bennett, R.
Berdnikov, A.
Berdnikov, Y.
Blau, D. S.
Bok, J. S.
Boyle, K.
Brooks, M. L.
Broxmeyer, D.
Buesching, H.
Bumazhnov, V.
Bunce, G.
Butsyk, S.
Campbell, S.
Caringi, A.
Castera, P.
Chen, C. -H.
Chi, C. Y.
Chiu, M.
Choi, I. J.
Choi, J. B.
PHYSICAL REVIEW LETTERS, 2011, 106 (06)
[17] π0 Transverse Single-Spin Asymmetries at η=4.1 in p plus p Collisions at √s=200 GeV
Drachenberg, J. L.
SPIN PHYSICS, 2009, 1149 : 517 - 520
[18] Cross section and longitudinal single-spin asymmetry AL for forward W± → μ±ν production in polarized p plus p collisions at √s=510 GeV
Adare, A.
Aidala, C.
Ajitanand, N. N.
Akiba, Y.
Akimoto, R.
Alexander, J.
Alfred, M.
Aoki, K.
Apadula, N.
Aramaki, Y.
Asano, H.
Atomssa, E. T.
Awes, T. C.
Azmoun, B.
Babintsev, V.
Bagoly, A.
Bai, M.
Bai, X.
Bandara, N. S.
Bannier, B.
Barish, K. N.
Bathe, S.
Baublis, V.
Baumann, C.
Baumgart, S.
Bazilevsky, A.
Beaumier, M.
Beckman, S.
Belmont, R.
Berdnikov, A.
Berdnikov, Y.
Black, D.
Blau, D. S.
Boer, M.
Bok, J. S.
Boyle, K.
Brooks, M. L.
Bryslawskyj, J.
Buesching, H.
Bumazhnov, V.
Butsyk, S.
Campbell, S.
Roman, V. Canoa
Chen, C. -H.
Chi, C. Y.
Chiu, M.
Choi, I. J.
Choi, J. B.
Choi, S.
Christiansen, P.
PHYSICAL REVIEW D, 2018, 98 (03)
[19] Transverse single-spin asymmetries at mid-rapidity at √s=200 GeV in p+p collisions
Eyser, K. Oleg
PARTICLES AND NUCLEI, 2006, 842 : 404 - 406
[20] Spin polarization transfer in the ((p)over-right-arrow,(n)over-right-arrow) and ((He)over-right-arrow,(t)over-right-arrow) reactions
Kim, BT
Lee, HS
Udagawa, T
INTERNATIONAL SYMPOSIUM ON NEW FACET OF SPIN GIANT RESONANCES IN NUCLEI, 1998, : 40 - 49

← 1 2 3 4 5 →