Measurement of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi mathvariant="italic">J</mml:mi><mml:mi>/</mml:mi><mml:mi>ψ</mml:mi></mml:math>and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>ψ</mml:mi><mml:mo>(</mml:mo><mml:mn>2</mml:mn><mml:mi mathvariant="italic">S</mml:mi><mml:mo>)</mml:mo></mml:math>Polarization in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi mathvariant="italic">p</mml:mi><mml:mrow>

Affolder, A. A.; Akimoto, H.; Akopian, A.; Albrow, M.; Amaral, P.; Amendolia, S. R.; Amidei, D.; Anikeev, K.; Antos̆, J.; Apollinari, G.; Arisawa, T.; Asakawa, T.; Ashmanskas, W.; Ataç, M.; Azfar, F.; Azzi, P.; Bacchetta, N.; Bailey, M. W.; Bailey, S.; Barbara, Paola; Barbaro‐Galtieri, A.; Barnes, V. E.; Barnett, B. A.; Barone, M.; Bauer, G.; Bedeschi, F.; Belforte, S.; Bellettini, G.; Bellinger, J.; Benjamin, D.; Bensinger, J. R.; Beretvas, A.; Berge, J. P.; Berryhill, J.; Bevensee, B.; Bhatti, A.; Binkley, M.; Bisello, D.; Blair, R. E.; Blocker, C.; Bloom, K.; Blumenfeld, B.; Blusk, S.; Bocci, A.; Bodek, A.; Bokhari, W.; Bolla, G.; Bonusnkin, Y.; Bortoletto, D.; Boudreau, J.; Brandl, A.; Brink, S. van den; Bromberg, C.; Brozović, M.; Bruner, N.; Buckley-Geer, E.; Budagov, J.; Budd, H. S.; Burkett, K.; Busetto, G.; Byon-Wagner, A.; Byrum, K. L.; Calafiura, P.; Campbell, M.; Carithers, W.; Carlson, J.; Carlsmith, D.; Cassada, J.; Castro, A.; Cauz, D.; Cerri, A.; Chan, A. 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doi:10.1103/physrevlett.85.2886

Cited by 199 publications

(87 citation statements)

References 24 publications

Supporting

Mentioning

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“…Þi: This would lead to a nontrivial result that J=c direct production is dominated by the 1 S ½8 0 channel; hence, J=c is mainly unpolarized, which agrees with the polarization measurement [5].…”

Section: Fig 2 (Color Online) Nlo Short-distance Coefficientŝsupporting

confidence: 83%

See 1 more Smart Citation

J/ψ(ψ′)Production at the Tevatron and LHC atO(αs4
Ma
¹
,
Wang
²
,
Kong
³

2011
Phys. Rev. Lett.
277
17
371
2
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We present a complete evaluation for J/ψ(ψ') prompt production at the Tevatron and LHC at next-to-leading order in nonrelativistic QCD, including color-singlet, color-octet, and higher charmonia feeddown contributions. The short-distance coefficients of 3P(J)([8]) at next-to-leading order are found to be larger than leading order by more than an order of magnitude but with a minus sign at high transverse momentum p(T). Two new linear combinations of color-octet matrix elements are obtained from the CDF data, and used to predict J/ψ production at the LHC, which agrees with the CMS data. The possibility of (1)S(0)([8]) dominance and the J/ψ polarization puzzle are also discussed.

show abstract

Section: Fig 2 (Color Online) Nlo Short-distance Coefficientŝsupporting

confidence: 83%

“…Dominated by gluon fragmentation to 3 S ½8 1 , the LO NRQCD predicts transverse polarization for J=c ðc 0 Þ at high p T [4], whereas measurements at the Fermilab Tevatron give almost unpolarized J=c ðc 0 Þ [5]. To exploit the underlying physics, several efforts have been made, either by introducing new channels [6] or by proposing other mechanisms [7].…”

mentioning

confidence: 99%

J/ψ(ψ′)Production at the Tevatron and LHC atO(αs4
Ma
¹
,
Wang
²
,
Kong
³

2011
Phys. Rev. Lett.
277
17
371
2
View full text Add to dashboard Cite

show abstract

“…[12], the feeddown contribution from χ c1 for J/ψ polarisation is in the interval [− , 1], regardless of its production mechanism. 3 We showed that the smearing from feeddown contribution will not change our result too much based on our direct J/ψ polarisation. Now, we are intending to give a rigorous prediction for prompt J/ψ yields and polarisation after including the feeddown contribution from χ cJ and ψ(2S) decay.…”

Section: Jhep05(2015)103mentioning

confidence: 82%

“…At the Tevatron, the polarization observable λ θ (or α) for both of prompt J/ψ and prompt ψ(2S) in their helicity frame measured by CDF Collaboration [3] are close to 0, which are in contradiction with the prediction of transverse polarization at the leading order (LO) in non-relativistic QCD (NRQCD) [4]. In the past a few years, three groups [5][6][7] reported their independent analyzes of J/ψ polarizations at the next-to-leading order (NLO) level in α S .…”

Section: Introductionmentioning

confidence: 99%

Yields and polarizations of prompt J/ψ and ψ(2S) production in hadronic collisions

Shao

Han

et al. 2015

J. High Energ. Phys.

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We give predictions of J/ψ and ψ(2S) yields and polarizations in prompt production at hadron colliders based on non-relativistic QCD factorization formula. We calculate short-distance coefficients of all important color-octet intermediate channels as well as color-singlet channels up to O(α 4 S ), i.e. next-to-leading order in α S . For prompt J/ψ production, we also take into account feeddown contributions from χ cJ (J=0,1,2) and ψ(2S) decays. Color-singlet long-distance matrix elements (LDMEs) are estimated by using potential model, and color-octet LDMEs are extracted by fitting the Tevatron yield data only. The predictions are satisfactory for both yields and polarizations of prompt J/ψ and prompt ψ(2S) production at the Tevatron and the LHC. In particular, we find our predictions for polarizations of prompt J/ψ production have only a little difference from our previous predictions for polarizations of direct J/ψ production.

show abstract

“…The well-known J=c polarization puzzle became obvious when the CDF measurement at the Tevatron [1] was found completely different from the leading-order (LO) theoretical prediction in the framework of nonrelativistic QCD (NRQCD) [2], which was proposed as a factorization approach on heavy quarkonium decay and production [3]. Even with the progress in the next-toleading-order (NLO) QCD calculation, theoretical studies [4][5][6] on J=c polarization at NLO could not clearly clarify the situation.…”

mentioning

confidence: 94%

Complete Next-to-Leading-Order Study on the Yield and Polarization ofΥ(1S,2S,3S)at the Tevatron and LHC

et al. 2014

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Based on the nonrelativistic QCD factorization scheme, we present the first complete next-to-leadingorder study on the yield and polarization of Çð1S; 2S; 3SÞ hadroproduction. By using the color-octet longdistance matrix elements obtained from fits of the experimental measurements on Ç yield and polarization at the Tevatron and LHC, our results can explain the measurements on the yield very well, and for the polarizations of Çð1S; 2S; 3SÞ, they are in (good, good, bad) agreement with recent CMS measurement, but still have some distance from the CDF measurement.The well-known J=c polarization puzzle became obvious when the CDF measurement at the Tevatron [1] was found completely different from the leading-order (LO) theoretical prediction in the framework of nonrelativistic QCD (NRQCD) [2], which was proposed as a factorization approach on heavy quarkonium decay and production [3]. Even with the progress in the next-toleading-order (NLO) QCD calculation, theoretical studies [4][5][6] on J=c polarization at NLO could not clearly clarify the situation. Early measurements [7,8] on the polarization of Ç at the Tevatron are also in conflict with the corresponding LO NRQCD prediction [9]. Recently, a very important and interesting measurement on the polarization of Çð1S; 2S; 3SÞ at the LHC was reported by the CMS Collaboration [10], which employed improved consideration in the measurement [11]. Since the bottom quark is almost three times as heavy as the charm quark, the NRQCD s and velocity expansions are of better convergence and the theoretical predictions at QCD NLO are more reliable for Ç than that for J=c . Therefore, it is very important to extend the theoretical predication on Ç at QCD NLO to solve or clarify the long-standing polarization puzzle when there are already measurements at the LHC.In the last six years, there has been some very important progress in the NLO QCD correction calculation. The NLO corrections to color-singlet (CS) J=c hadroproduction have been investigated in Refs. [12,13], where its transverse momentum (p t ) distribution is found to be enhanced by 2-3 orders of magnitude at the high p t region and its polarization changes from transverse to longitudinal at NLO [13]. The results are reproduced at p t LO in a new factorization scheme for large p t quarkonium production [14]. The NLO corrections to J=c production via S-wave color-octet (CO) states ( 1 S ½8 0 , 3 S ½8 1 ) are studied in Ref.[15] and the corrections to the p t distributions of both the J=c yield and polarization are small. In Ref.[16], NLO corrections for cJ hadroproduction are studied. The complete NLO calculation for prompt J=c hadroproduction (with 3 P ½8 J included) was given by two groups [17,18], and their predictions for p t distributions agree with the experimental measurements at the Tevatron and LHC. The calculation for polarization of direct J=c hadroproduction at NLO QCD was presented by two groups [4,5]. The complete NLO calculation of the polarization for prompt J=c hadroproduction was completed by our group [6...

show abstract

Measurement ofJ/ψandψ(2S)Polarization inp

Cited by 199 publications

References 24 publications

J/ψ(ψ′)Production at the Tevatron and LHC atO(αs4
Ma
¹
,
Wang
²
,
Kong
³

2011
Phys. Rev. Lett.
277
17
371
2
View full text Add to dashboard Cite

J/ψ(ψ′)Production at the Tevatron and LHC atO(αs4
Ma
¹
,
Wang
²
,
Kong
³

2011
Phys. Rev. Lett.
277
17
371
2
View full text Add to dashboard Cite

Yields and polarizations of prompt J/ψ and ψ(2S) production in hadronic collisions

Complete Next-to-Leading-Order Study on the Yield and Polarization ofΥ(1S,2S,3S)at the Tevatron and LHC

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About

Measurement ofJ/ψandψ(2S)Polarization inp

Cited by 199 publications

References 24 publications

J/ψ(ψ′)Production at the Tevatron and LHC atO(αs4Ma1, Wang2, Kong3 2011Phys. Rev. Lett.277173712View full textAdd to dashboardCite

J/ψ(ψ′)Production at the Tevatron and LHC atO(αs4Ma1, Wang2, Kong3 2011Phys. Rev. Lett.277173712View full textAdd to dashboardCite

Yields and polarizations of prompt J/ψ and ψ(2S) production in hadronic collisions

Complete Next-to-Leading-Order Study on the Yield and Polarization ofΥ(1S,2S,3S)at the Tevatron and LHC

Contact Info

Product

Resources

About

J/ψ(ψ′)Production at the Tevatron and LHC atO(αs4
Ma
¹
,
Wang
²
,
Kong
³

2011
Phys. Rev. Lett.
277
17
371
2
View full text Add to dashboard Cite

J/ψ(ψ′)Production at the Tevatron and LHC atO(αs4
Ma
¹
,
Wang
²
,
Kong
³

2011
Phys. Rev. Lett.
277
17
371
2
View full text Add to dashboard Cite