Ishtiaq Ahmed

activity

20242026

collaborators

8 papers

hep-ph2026

Weak decay of the positronium ion

Nishat Ul Sani, M. Jamil Aslam, Ishtiaq Ahmed

The positronium ion ( $Ps^{-}$ ), a coulombic three-body bound state of two electrons and a positron, predominantly decays via electron-positron annihilation into electromagne…

hep-ph2026

A Phenomenological Study of Semileptonic $B^{+}$ and $B_{s}^{0}$ Decays into Axial-Vector Mesons $(D_{1} (2420), D_{1}^{'} (2430), D_{s 1} (2460), and D_{s 1}^{'} (2536))$ within the Standard Model

Rana Khan, Qazi Maaz Us Salam, Zohaib Aarfi +1

We study semileptonic $B$ meson decays $B^{+} \to D_{1}^{(')} ℓ^{+} I^½_{ℓ}$ and $B_{s}^{0} \to D_{s 1}^{- (')} ℓ^{+} I^½_{ℓ}$ , where $ℓ = I^¼, I ¨ $ . The final state axial vector meson…

hep-ph2026

The Angular Observables of $I^_{b} \to I^_{c} (\to I^^{0} I ¨ ^{+}) I ¨ ^{-} (\to I ¨ ^{-} I^½_{I ¨} ) I^ˉ ½_{I ¨} $ within the Paradigm of FCCC Anomalies

Muhammad Arslan, Ishtiaq Ahmed, Muhammad Jamil Aslam

We present a global analysis of the current $B$ -meson flavor anomalies and extend it to the baryonic sector through the decay $Î_b^0 \to Î_c^+(\to Î^0 Ï^+) Ï^-(\to Ï^- Î½_Ï)…

hep-ph2025

Addressing the $R_{I ¨ / I^¼, e} (D^{(*)})$ puzzle through New Physics four-fermion operators and their impact on $I^_{b} \to I^_{c} I ¨ I^ˉ ½_{I ¨} $ decay

Muhammad Arslan, Ishtiaq Ahmed, Muhammad Jamil Aslam +2

The Lepton Flavor Universality ratio $R_{I ¨ / I^¼, e} (D^{(*)})$ poses a challenge to the Standard Model (SM), as B-factory experiments, BaBar, Belle, and the LHCb show $3.…

hep-ph2025

Exploring New Physics in transition $b \to s ℓ^{+} ℓ^{-}$ through different $B_{c} \to D_{s}^{(*)} ℓ^{+} ℓ^{-}$ observables

Qazi Maaz Us Salam, Ishtiaq Ahmed, Rizwan Khalid +1

Inspired by the discrepancies observed in the $b \to s ℓ^{+} ℓ^{-}$ neutral current decays, we study the decay channel $B_{c} \to D_{s}^{(*)} ℓ^{+} ℓ^{-}$ ( $ℓ = I^¼, I ¨ $ ), which is…

hep-ph2024

Probing New Physics in light of recent developments in $b \to c ℓ I^½$ transitions

Tahira Yasmeen, Ishtiaq Ahmed, Saba Shafaq +2

The experimental studies of the observables associated with the $b \to c$ transitions in the semileptonic $B -$ meson decays at BaBar, Belle and LHCb have shown some deviati…

Weak decay of the positronium ion

A Phenomenological Study of Semileptonic B+ and Bs0​ Decays into Axial-Vector Mesons (D1​(2420),D1′​(2430),Ds1​(2460),and Ds1′​(2536)) within the Standard Model

The Angular Observables of I^b​→I^c​(→I^0I¨+)I¨−(→I¨−I^½I¨​)I^ˉ½I¨​ within the Paradigm of FCCC Anomalies

Addressing the RI¨/I^¼,e​(D(∗)) puzzle through New Physics four-fermion operators and their impact on I^b​→I^c​I¨I^ˉ½I¨​ decay

Exploring New Physics in transition b→sℓ+ℓ− through different Bc​→Ds(∗)​ℓ+ℓ− observables

Probing New Physics in light of recent developments in b→cℓI^½ transitions

A Phenomenological Study of Semileptonic $B^{+}$ and $B_{s}^{0}$ Decays into Axial-Vector Mesons $(D_{1} (2420), D_{1}^{'} (2430), D_{s 1} (2460), and D_{s 1}^{'} (2536))$ within the Standard Model

The Angular Observables of $I^_{b} \to I^_{c} (\to I^^{0} I ¨ ^{+}) I ¨ ^{-} (\to I ¨ ^{-} I^½_{I ¨} ) I^ˉ ½_{I ¨} $ within the Paradigm of FCCC Anomalies

Addressing the $R_{I ¨ / I^¼, e} (D^{(*)})$ puzzle through New Physics four-fermion operators and their impact on $I^_{b} \to I^_{c} I ¨ I^ˉ ½_{I ¨} $ decay

Exploring New Physics in transition $b \to s ℓ^{+} ℓ^{-}$ through different $B_{c} \to D_{s}^{(*)} ℓ^{+} ℓ^{-}$ observables

Probing New Physics in light of recent developments in $b \to c ℓ I^½$ transitions