Measurement Of The Dipion Mass Spectrum In The Decay X 3872 Right Arrow J Psi Pi Pi At The Cdfii Experiment

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Measurement Of The Dipion Mass Spectrum In The Decay X 3872 Right Arrow J Psi Pi Pi At The Cdfii Experiment

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Author : Alexander Yurevich Rakitin
language : en
Publisher:
Release Date : 2005

Measurement Of The Dipion Mass Spectrum In The Decay X 3872 Right Arrow J Psi Pi Pi At The Cdfii Experiment written by Alexander Yurevich Rakitin and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.

We present a measurement of the dipion mass spectrum in the decay X(3872) [right arrow] J/ [psi] [pi]+ [pi]− using a 360 pb-1 sample of pp collisions at av [square root]s = 1.96 TeV collected with the CDF II detector at the Fermnilab Tevatron Collider. As a benchmark, we also extract the dipion mass distribution for [psi] (2s) [right arrow] J/ [psi] [pi]+ [pi]− decay. The X(3872) dipion mass spectrum is compared to QCD multipole expansion predictions for various charmonium states, as well as to the hypothesis [right arrow] J/ [psi] po. We find that the measured spectrum is compatible with 3S1 charmonium decaying to J/ [psi] [pi]+ [pi]− - and with the X(3872) - J/po hypothesis. There is, however, no 3S1 charmonium state available for assignment to the X(3872). The multipole expansion calculations for 1P1 and 3DJ states are in clear disagreement with the X(3872) data. For the [psi] (2S) the data agrees well with previously published results and to multipole expansion calculations for 3S1 charmonium. Other, non-charmonium, models for the X(3872) are described too. We conclude that since the dipion mass spectrum for X(3872) is compatible with J/pO hypothesis, the X(3872) should be C-positive. This conclusion is supported by recent results from Belle Collaboration which observed X(3872) -+ J/7y decay. We argue that if X(3872) is a charmonium, then it should be either ... state, decaying into J/ [psi] [pi]+ [pi]− in violation of isospin conservation. A non-charmonium assignment, such as DD* molecule, is also quite possible.

Measurement Of The Dipion Mass Spectrum In The Decay X 3872 2 J Psi Pi Pi At The Cdf Ii Experiment

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Author :
language : en
Publisher:
Release Date : 2005

Measurement Of The Dipion Mass Spectrum In The Decay X 3872 2 J Psi Pi Pi At The Cdf Ii Experiment written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.

The author presents a measurement of the dipion mass spectrum in the decay X(3872) → J/[Psi][pi]+ [pi]- using a 360 pb-1 sample of p$\bar{p}$ collisions at √s = 1.96 TeV collected with the CDF II detector at the Fermilab Tevatron Collider. As a benchmark, they also extract the dipion mass distribution for [Psi](2S) → J/[Psi][pi]+ [pi]- decay. The X(3872) dipion mass spectrum is compared to QCD multipole expansion predictions for various charmonium states, as well as to the hypothesis X(3872) → J/[Psi][rho]0. They find that the measured spectrum is compatible with 3S1 charmonium decaying to J/[Psi][pi]+ [pi]- and with the X(3872) → J/[Psi][rho]0 hypothesis. There is, however, no 3S1 charmonium state available for assignment to the X(3872). The multipole expansion calculations for 1P1 and 3DJ states are in clear disagreement with the X(3872) data. For the [Psi](2S) the data agrees well with previously published results and to multipole expansion calculations for 3S1 charmonium. Other, non-charmonium, models for the X(3872) are described too. They conclude that since the dipion mass spectrum for X(3872) is compatible with J/[Psi][rho]0 hypothesis, the X(3872) should be C-positive. This conclusion is supported by recent results from Belle Collaboration which observed X(3872) → J/[Psi][gamma] decay. They argue that if X(3872) is a charmonium, then it should be either 1D2± or 23P1++ state, decaying into J/[Psi][pi]+ [pi]- in violation of isospin conservation. A non-charmonium assignment, such as D$\bar{D}$* molecule, is also quite possible.

Measurement Of The Dipion Mass Spectrum In The Decay X 3872 J Psi Pi Pi At The Cdf Ii Experiment

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Author :
language : en
Publisher:
Release Date : 2005

Measurement Of The Dipion Mass Spectrum In The Decay X 3872 J Psi Pi Pi At The Cdf Ii Experiment written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.

The authors present a measurement of the dipion mass spectrum in the decay X(3872) [yields] J/[psi][pi][sup +][pi][sup -] using a 360 pb[sup -1] sample of p[bar p] collisions at [radical]s = 1.96 TeV collected with the CDF II detector at the Fermilab Tevatron Collider. As a benchmark, they also extract the dipion mass distribution for [psi](2S) [yields] J/[psi][pi][sup +][pi][sup -] decay. The X(3872) dipion mass spectrum is compared to QCD multipole expansion predictions for various charmonium states, as well as to the hypothesis X(3872) [yields] J/[psi]p[sup 0]. They find that the measured spectrum is compatible with [sup 3]S[sub 1] charmonium decaying to J/[psi][pi][sup +][pi][sup -] and with the X(3872) [yields] J/[psi]p[sup 0] hypothesis. There is, however, no [sup 3]S[sub 1] charmonium state available for assignment to the X(3872). The multipole expansion calculations for [sup 1]P[sub 1] and [sup 3]D[sub J] states are in clear disagreement with the X(3872) data. For the [psi](2S) the data agrees well with previously published results and to multipole expansion calculations for [sup 3]S[sub 1] charmonium. Other, non-charmonium, models for the X(3872) are described too. The authors conclude that since the dipion mass spectrum for X(3872) is compatible with J/[psi]p[sup 0] hypothesis, the X(3872) should be C-positive. This conclusion is supported by recent results from Belle Collaboration which observed X(3872) [yields] J/[psi][gamma] decay. They argue that if X(3872) is a charmonium, then it should be either 1[sup 1]D[sub 2-+] or 2[sup 3]P[sub 1++] state, decaying into J/[psi][pi][sup +][pi][sup -] in violation of isospin conservation. A non-charmonium assignment, such as D[bar D]* molecule, is also quite possible.

Measurement Of The Dipion Mass Spectrum In X 3872 J Psi Pi Pi Decays

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Author :
language : en
Publisher:
Release Date : 2005

Measurement Of The Dipion Mass Spectrum In X 3872 J Psi Pi Pi Decays written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.

The authors measure the dipion mass spectrum in X(3872) → J/???− decays using 360 pb−1 of {bar p}p collisions at √s = 1.96 TeV collected with the CDF II detector. The spectrum is fit with predictions for odd C-parity (3S1, 1P1, and 3D{sub J}) charmonia decaying to J/??+?−, as well as event C-parity states in which the pions are from?° decay. The latter case also encompasses exotic interpretations, such as a D°{bar D}*° molecule. Only the 3S1 and J/?? hypotheses are compatible with the data. Since 3S1 is untenable on other grounds, decay via J/?? is favored, which implies C = +1 for the X(3872). Models for different J/?-? angular momenta L are considered. Flexibility in the models, especially the introduction of?-? interference, enable good descriptions of the data for both L = 0 and 1.

Measurement Of The Dipion Mass Spectrum In The Decay X 3872 U2192 J At The Cdf Ii Experiment

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Author :
language : en
Publisher:
Release Date : 2005

Measurement Of The Dipion Mass Spectrum In The Decay X 3872 U2192 J At The Cdf Ii Experiment written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.

The author presents a measurement of the dipion mass spectrum in the decay X(3872) → J/??+ ?- using a 360 pb-1 sample of p$ar{p}$ collisions at √s = 1.96 TeV collected with the CDF II detector at the Fermilab Tevatron Collider. As a benchmark, they also extract the dipion mass distribution for ?(2S) → J/??+ ?- decay. The X(3872) dipion mass spectrum is compared to QCD multipole expansion predictions for various charmonium states, as well as to the hypothesis X(3872) → J/??0. They find that the measured spectrum is compatible with 3S1 charmonium decaying to J/??+ ?- and with the X(3872) → J/??0 hypothesis. There is, however, no 3S1 charmonium state available for assignment to the X(3872). The multipole expansion calculations for 1P1 and 3DJ states are in clear disagreement with the X(3872) data. For the ?(2S) the data agrees well with previously published results and to multipole expansion calculations for 3S1 charmonium. Other, non-charmonium, models for the X(3872) are described too. They conclude that since the dipion mass spectrum for X(3872) is compatible with J/??0 hypothesis, the X(3872) should be C-positive. This conclusion is supported by recent results from Belle Collaboration which observed X(3872) → J/?? decay. They argue that if X(3872) is a charmonium, then it should be either 1D2± or 23P1++ state, decaying into J/??+ ?- in violation of isospin conservation. A non-charmonium assignment, such as D$ar{D}$* molecule, is also quite possible.

Study Of The B J Psi K Pi Pi Decay And Measurement Of The B X 3872 K Branching Fraction

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Author :
language : en
Publisher:
Release Date : 2004

Study Of The B J Psi K Pi Pi Decay And Measurement Of The B X 3872 K Branching Fraction written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with categories.

The authors study the decay B[sup -] [yields] J/[psi]K[sup -][pi][sup +][pi][sup -] using 117 million B[bar B] events collected at the [Upsilon](4S) resonance with the BaBar detector at the PEP-II e[sup +]e[sup -] asymmetric-energy storage ring. They measure the branching fractions [Beta](B[sup -] [yields] J/[psi]K[sup -] [pi][sup +][pi][sup -]) = (116 [+-] 7(stat.) [+-] 9(syst.)) x 10[sup -5] and [Beta](B[sup -] [yields] X(3872)K[sup -]) x [Beta](X(3872) [yields] J/[psi][pi][sup +][pi][sup -]) = (1.28 [+-] 0.41) x 10[sup -5] and find the mass of the X(3872) to be 3873.4 [+-] 1.4MeV/c[sup 2]. They search for the h[sub c] narrow state in the decay B[sup -] [yields] h[sub c] K[sup -], h[sub c] [yields] J/[psi][pi][sup +][pi][sup -] and for the decay B[sup -] [yields] J/[psi]D[sup 0][pi][sup -], with D[sup 0] [yields] K[sup -][pi][sup +]. They set the 90% C.L. limits [Beta](B[sup -] [yields] h[sub c]K[sup -]) x [Beta](h[sub c] [yields] J/[psi][pi][sup +][pi][sup -])

Study Of The Psi 2 3823 And Chi C1 3872 States In B Rightarrow Left J Psi Pi Pi Right K Decays

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Author : Roel Aaij
language : en
Publisher:
Release Date : 2020

Study Of The Psi 2 3823 And Chi C1 3872 States In B Rightarrow Left J Psi Pi Pi Right K Decays written by Roel Aaij and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020 with categories.

A Study Of The Dipion Production In The Reaction Pi P Arrow Pi Pi N Between 1 6 And 2 4 Gev C

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Author : Andris Skuja
language : en
Publisher:
Release Date : 1972

A Study Of The Dipion Production In The Reaction Pi P Arrow Pi Pi N Between 1 6 And 2 4 Gev C written by Andris Skuja and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1972 with categories.

Search For An X 3872 Charged Partner In The Decay Mode X J Psi Pi Pi0 In The B Meson Decays B0 X K And B X Ks

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Author :
language : en
Publisher:
Release Date : 2004

Search For An X 3872 Charged Partner In The Decay Mode X J Psi Pi Pi0 In The B Meson Decays B0 X K And B X Ks written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with categories.

The authors have performed a search for a charged partner of the X(3872) decaying to J/[psi][pi][sup [+-]][pi][sup 0]. The results set upper limits on the product branching fractions of B([bar B][sup 0]/B[sup 0] --> X[sup [+-]]K[sup [-+]], X[sup [+-]] --> J/[psi][sup [+-]][pi][sup 0]) 5.2 x 10[sup -6] and B(B[sup [+-]]) -- X[sup [+-]]K[sup 0][sub s], X[sup [+-]] --> J/[psi][sup [+-]][pi][sup 0]

Search For A Charged Partner Of The X 3872 In The B Meson Decay B To X K X To J Psi Pi Pi0

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Author :
language : en
Publisher:
Release Date : 2005

Search For A Charged Partner Of The X 3872 In The B Meson Decay B To X K X To J Psi Pi Pi0 written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.