Rebreathing in Pediatric Anesthesia: Recommendations and Descriptions of Improvements in Apparatus

Adriani, John; Griggs, Thomas

doi:10.1097/00000542-195307000-00003

Cited by 23 publications

(6 citation statements)

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“…We want to note that a comparison of YFS3 with the O (α 2 ) exact results in Ref. [7] has also been carried out [1,8] and it agrees with our findings. The way is open to incorporate the exact O (α 2 ) matrix element for the L3-type llγγ event phase space into YFS3 if the statistics on these events would be increased to require such accuracy in the YFS3 predictions.…”

Section: Discussionsupporting

confidence: 89%

“…and the recent exact results [4] by the three of us on the processes e + e − → ll+γγ, l = e, µ, τ , in the Z 0 resonance region to assess the probability that the observations in Refs. [1,2] are consistent with higher-order QED processes. This means that the over-all normalization of our calculations in the L3 acceptance must be known even in the presence of the strong initial state radiative effects associated with the Z 0 resonance line shape.…”

mentioning

confidence: 52%

“…[4] for the process e + e − → ll + 2γ, restricted to the L3-type phase space cuts as they are given in Ref. [1], with those predicted by YFS3. Here, we emphasize immediately that, due to the wide angles of the photons with respect to the charged par- ticles, the effect of radiative corrections on the Z 0 line shape has been taken into account properly in YFS3, and this amounts to an over-all normalization correction to the cross section for L3-type events.…”

Section: Comparison Of Yfsand Exact O (α 2 ) Results For L3-type Eventsmentioning

confidence: 89%

“…3(b) and 4(b) are the MC results from the L3 paper, Ref. [1], which are just the YFS3 results, of course. We conclude that, in all cases in Figs.…”

Section: Comparison Of Yfsand Exact O (α 2 ) Results For L3-type Eventsmentioning

confidence: 97%

“…Graph (a) shows the photon mass distribution obtained using YFS3 and the exact O(α 2 ) matrix elements. Graph (b) shows the same results normalized to give the number of events expected for a total integrated luminosity of 27 pb −1 , together with a dotted line showing the YFS Monte Carlo results used by the L3 Collaboration[1].…”

mentioning

confidence: 99%

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Theoretical expectations for high mass photon pairs inl+l−
Jadach
¹
,
Ward
²
,
Yost
³

1995
Phys. Rev. D
6
0
14
0
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Recently, the L3 collaboration has reported the observation of four events in the reactions e + e − → ll + γγ, l = e, µ, τ , with the invariant photon pair mass near 60 GeV in a data sample collected in the L3 detector corresponding to 950,000 produced Z 0 's. More recently, more data from the other LEP collaborations have become available. In this paper, we use the Monte Carlo genrator YFS3 and our recent exact results on e + e − → ll + γγ to assess the QED expectations for such L3-type high mass photon pair events in e + e − → ll + γγ + n(γ) near the Z 0 resonance.Recently, the L3 collaboration reported [1] the observation of high-mass γγ pairs in the reactions e + e − → ll+γγ in the Z 0 resonance region; in particular, four such events were reported with the invariant γγ mass near 60 GeV from a data sample corresponding to 950,000 produced Z 0 's in the LEP e + e − colliding beam device. More recently, related data from the ALEPH, DELPHI, and OPAL Collaborations [2] have become available, and hence, an immediate issue which needs to be addressed is that of the theoretical expectations from the basic QED processes themselves for such high-mass photon pairs. It is this issue which we shall address in what follows.More specifically, we want to use the YFS Monte Carlo approach [3] to higher-order SU 2L ×U 1 processes introduced by two of us (S.J.and B.F.L.W.) and the recent exact results [4] by the three of us on the processes e + e − → ll+γγ, l = e, µ, τ , in the Z 0 resonance region to assess the probability that the observations in Refs. [1,2] are consistent with higher-order QED processes. This means that the over-all normalization of our calculations in the L3 acceptance must be known even in the presence of the strong initial state radiative effects associated with the Z 0 resonance line shape. Accordingly, we will employ our YFS Monte Carlo event generator [3], which treats e + e − → f f +n(γ), in the Z 0 resonance region with the n(γ) multiple photon radiation for both the initial and final fermion. Here, f is a fundamental SU 2L × U 1 fermion. We should stress that, strictly speaking, f = e is implicit in YFS3. However, in the L3 acceptance for the high mass γγ pairs, kinematical cuts eliminate any large effect from the exchanges in e + e − → e + e − + n(γ) which are not the s-channel Z 0 exchange, so that we can use YFS3 for our analysis at the currently required level of precision. Our recent results in Ref.[4] of course do not have any such qualification in their applicability to the L3-type events for e + e − γγ final states: the full matrix element is available from Ref.[4], and indeed, it will be used to check the validity of our YFS3 s-channel exchange approach to the high γγ mass L3-type e + e − γγ final states, for example.What we will do in this paper then is to set the QED higher order expectations for the L3-type high γγ invariant mass events. We hope that sufficient data will be taken so that the statistical errors on the experimental results analyzed in this paper will cease to be the over-r...

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Section: Discussionsupporting

confidence: 89%

mentioning

confidence: 52%

Section: Comparison Of Yfsand Exact O (α 2 ) Results For L3-type Eventsmentioning

confidence: 89%

“…3(b) and 4(b) are the MC results from the L3 paper, Ref. [1], which are just the YFS3 results, of course. We conclude that, in all cases in Figs.…”

Section: Comparison Of Yfsand Exact O (α 2 ) Results For L3-type Eventsmentioning

confidence: 97%

mentioning

confidence: 99%

See 3 more Smart Citations

Theoretical expectations for high mass photon pairs inl+l−
Jadach
¹
,
Ward
²
,
Yost
³

1995
Phys. Rev. D
6
0
14
0
View full text Add to dashboard Cite

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Narkosebeatmung — Prinzipien

Altemeyer¹

1993

Beatmung Von Kindern in Anästhesie Und Intensivmedizin

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Closed-Circuit Anaesthesia for Paediatric Patients

Lin¹

1986

Closed-Circuit System and Other Innovations in Anaesthesia

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Rebreathing in Pediatric Anesthesia: Recommendations and Descriptions of Improvements in Apparatus

Cited by 23 publications

References 0 publications

Theoretical expectations for high mass photon pairs inl+l−
Jadach
¹
,
Ward
²
,
Yost
³

1995
Phys. Rev. D
6
0
14
0
View full text Add to dashboard Cite

Theoretical expectations for high mass photon pairs inl+l−
Jadach
¹
,
Ward
²
,
Yost
³

1995
Phys. Rev. D
6
0
14
0
View full text Add to dashboard Cite

Narkosebeatmung — Prinzipien

Closed-Circuit Anaesthesia for Paediatric Patients

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Rebreathing in Pediatric Anesthesia: Recommendations and Descriptions of Improvements in Apparatus

Cited by 23 publications

References 0 publications

Theoretical expectations for high mass photon pairs inl+l−Jadach1, Ward2, Yost3 1995Phys. Rev. D60140View full textAdd to dashboardCite

Theoretical expectations for high mass photon pairs inl+l−Jadach1, Ward2, Yost3 1995Phys. Rev. D60140View full textAdd to dashboardCite

Narkosebeatmung — Prinzipien

Closed-Circuit Anaesthesia for Paediatric Patients

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Product

Resources

About

Theoretical expectations for high mass photon pairs inl+l−
Jadach
¹
,
Ward
²
,
Yost
³

1995
Phys. Rev. D
6
0
14
0
View full text Add to dashboard Cite

Theoretical expectations for high mass photon pairs inl+l−
Jadach
¹
,
Ward
²
,
Yost
³

1995
Phys. Rev. D
6
0
14
0
View full text Add to dashboard Cite